Hi,

I just came across the following Service Tip on the Allison web site:

http://www.allisontransmission.com/servlet/DownloadOnDemand?ApplicationID=155&DownloadID=5&Preview=1

It seems to be saying that TranSynd is still their recommended ATF for Allison transmissions even for GM model year 2006 and later that require Dextron-VI. Am I reading it correctly and what do others recommend?

Will using a non-Dextron-VI licensed product void GM's waranty?

Hi,

I just came across the following Service Tip on the Allison web site:

http://www.allisontransmission.com/servlet/DownloadOnDemand?ApplicationID=155&DownloadID=5&Preview=1

It seems to be saying that TranSynd is still their recommended ATF for Allison transmissions even for GM model year 2006 and later that require Dextron-VI. Am I reading it correctly and what do others recommend?

Will using a non-Dextron-VI licensed product void GM's waranty?

TranSynd is still Allisons prefered fluid unless Machinator says different. TranSynd will not void your warranty and I have not heard of any top quality fluid put anyones warranty in jeapordy.
mike

What he said:)
The topic seems a little confusing, but essentially everything is dexron 6 now, with Transynd grandfathered in. One way to look at it anyway.

I don't mean to hijack, but I can't find TranSynd anywhere. Will the new Valvoline synthetec Dex VI work on my LLY?
Thanks
Jerry

I don't mean to hijack, but I can't find TranSynd anywhere. Will the new Valvoline synthetec Dex VI work on my LLY?
Thanks
Jerry

Yes it will work fine. TranSynd can only be purchased at an Allison dealer.

Well, this just confuses the matter further if you ask me. Check out the attached reference from hiker; on page 15 it shows the fluid change intervals. Now, if I understand correctly, with a HD GM pickup and Duramax, we have the series 1000/2000 transmission, right? The chart lists a 1000/2000 NON-Pickup catagory, so where do we fall into? Then if you read further, it shows NON-TES fluids at 50,000 miles regular service, or 12,000 miles severe service. Now, the question is, does DEX VI fall into the "non-TES 295" catagory? Man - 12,000 miles is not very far to go before you need a severe service change on what I would presume is DEX VI. And what's more confusing, my '06 manual from GM (Chevy) calls for a severe service change at 25,000 miles on DEX VI. Further, I don't understand the difference between TES 295 and TES 389 fluids. TES 295 appears to be Transynd; can we assume that the TES 389 is the new DEX VI?

It would be nice if these two compaines (don't forget that GM owns Allison, for now anyway) would get together and publish a JOINT statementon the requirement on fluids and the fluid/filter change intervals.

I just read the whole attachment.

Apparently TES 295 "Transynd" type fluids are still the "recommended" fluids.

TES 389 was created for the "DEX VI" and is now on the approved list, but apparently is still not as robust as the TES 295 stuff. I say this because only the TES 295 fluid gets the long intervals for the fluid changes. All others (NON TES 295) get a reduced change interval.

Still - would be nice if GM and Allison would get on the same page and do a joint doccument, because what GM says in the owners manual and what Allison says in this statement are not in cohesion as far as TES 389 severe service fluid changes.

After my warranty expires (3 years), I'm going right to the TES 295 stuff!

I just read the whole attachment.

Apparently TES 295 "Transynd" type fluids are still the "recommended" fluids.

TES 389 was created for the "DEX VI" and is now on the approved list, but apparently is still not as robust as the TES 295 stuff. I say this because only the TES 295 fluid gets the long intervals for the fluid changes. All others (NON TES 295) get a reduced change interval.

Still - would be nice if GM and Allison would get on the same page and do a joint doccument, because what GM says in the owners manual and what Allison says in this statement are not in cohesion as far as TES 389 severe service fluid changes.

After my warranty expires (3 years), I'm going right to the TES 295 stuff!

Thanks for taking the time to read the attachment. I agree with your interpretation. I want to change ATF at 25K and would prefer using Transynd but like you am concerned about voiding the GM warranty. Seems weird that Allison and GM don't seem to agree.

I've been on the net today trying to find info specific to the Transynd (Allison-Castrol), Torqdrive (Amsoil) and others. The DEX VI is a major improvement over the past DEX III(h), and it's apparently a semi-synthetic. Now, many of the major oil companies are on the wagon for this new product, including Castrol, Penzoil, Kendall, and so on.

Because the Transynd and Torqdrive are both full synthetics, and they are a cut above even the DEX VI. I guess it's a matter of the "good, better, best" mentality. I'm not at all a convert to Amsoil, but their product does seem to be a good alternative to the Transynd; it was reverse engineered and is an extremely close match. However, the DEX VI is the OEM MANUFACTURER'S CHOICE (GM), and for me, warranty compliance is king until my wallet has to take over the costs.

In the attachment, I did notice that the "severe" service guildlines would be VERY extreme for most of us. We need to remember that the Allison products are used in much more than just GM light duty trucks. For the Allison tranmission team, I believe that they mean "severe" when they look at significant stop/go while pulling heavy loads (think of shuttle busses at airports, trash trucks, etc.). I even wonder if that's why you'll see that they listed the 1000/2000 trans series as "non-pickup".

Food for thought.

FYI...

Schaeffer's 204SAT-All Trans Supreme Fully-Synthetic transmission fluid can be used where TES-295 (Transynd) & TES-389 (Allison Dex VI spec) are recommended.

BoiseRob

Yesturday I just dropped some Dex VI in along with a new spin-on. Also Mike, I put another bottle of that other stuff in.

FYI...

Schaeffer's 204SAT-All Trans Supreme Fully-Synthetic transmission fluid can be used where TES-295 (Transynd) & TES-389 (Allison Dex VI spec) are recommended.

BoiseRob

many specialty tranny rebuilders use only schaeffers.it's considered the best! probably the most expensive too!

Also Mike, I put another bottle of that other stuff in.
What other stuff?? do tell

Transynd is fully synthetic fluid developed for Allison by Castrol.
It's used in city port authority buses, large contruction vehicles, ect,ecf,
all with servere duty in mind.
Dex VI is a GM branded fluid used in everything they build including Saturns, Cobalts, Monte Carlos.
If you show up at your local dealership with your Allison in a funk, but still under warrenty unless the vehicle shows obvious signs of abuse, it will be repaired under warrenty. Remember the dealershio stands to make a buck from GM on the repair.
All of the fluids talked about in these forums are of good quality and will do the job. Some are better than others, but they all work. I don't think any of them will cause premature failure of your transmision as long as you follow your scheduled maintenance. I pull a 15,000 lb trailer with my dully. I consider that servere duty. My choice is Transynd, following the servere duty schedule, wjth absolutely no concern for warrenty being denied

Sorry, you guys have mis-interpreted the TES-389 spec.

If you read the spec, TES-389 is Allison's version of DEXRON III spec since GM no longer licenses DEX III.

In fact, has anyone found a DEX VI that is also TES-389 approved?

Sorry, you guys have mis-interpreted the TES-389 spec.

If you read the spec, TES-389 is Allison's version of DEXRON III spec since GM no longer licenses DEX III.

In fact, has anyone found a DEX IV that is also TES-389 approved?

I have never seen Dex 4. What vehichles used it?

Here's the reference excerpt from TES-389:

2.1. Only formerly licensed DEXRON-III, H Specification automatic transmission fluids shall be considered as valid candidate fluids for approval and licensing under this specification.

2.3. Applicants shall submit copies of their General Motors DEXRON-III license forms to the Allison Transmission license administrator as proof of former DEXRON-III, H specification license.

Read that part about GENERAL MOTORS ... license. GM controls the DEXRON license. Allison has to come up with their own spec where the former DEXRON III is fine in certain applications their transmissions, hence TES-389.

Sorry Mike, just a typo. Should be DEX VI.
Sort of like what's a "vehichles" :)

But there actually was a DEX 4 spec, don't think it was ever licensed though.

Sorry Mike, typo. Should be DEX VI.

I kinda thought so but I have seen Dex 4 referred to a bunch of times and just wanted to know. I was in no way trying to correct you. Thanks. :D

Mike,
Your corrections are welcome anytime... especially on my typing!!
I should try downloading that spell checker!

FYI...

Schaeffer's 204SAT-All Trans Supreme Fully-Synthetic transmission fluid can be used where TES-295 (TranSynd) & TES-389 (Allison Dex VI spec) are recommended.

BoiseRob

I think you might be confused here.

That document states at the bottom of Page 2:

All Trans Supreme is not recommended for use in those passenger cars and light duty trucks that specify the use of Ford Type F, Ford M2C33F, Ford MerconŽSP, Automatic Transmission Fluid Type G, GM Dexron VI, Honda CVT, Honda Genuine, Nissan Matic K, Nissan CVT type fluids or in dual clutch transmissions (DCT) or continuously variable transmissions (CVT).

Sorry Mike, just a typo. Should be DEX VI.
Sort of like what's a "vehichles" :)

But there actually was a DEX 4 spec, don't think it was ever licensed though.

Show me some love here Crafty1. ):h :D Never said I could spell. I have seen Dex 4 in print over the years but never an application, so it made me wonder.

I just found a very interesting alternative for the tranny fluid.

Consider a product called "AutoTrans 5" from a company called DA Lubricant Company (www.dalube.com). The AutoTrans 5 product is a TES-295 clone just like 204SAT and TorqDrive, but it is VERY cost competitive. I just got off the phone with them and they are quoting $95 for a 5 gallon pail. THAT'S ONLY $19 A GALLON! for a Transynd Clone! I did some research of their specs, and they are right in line with Transynd and Mobil Delvac Synthetic ATF (which are officially licensed) and Torqdrive and 204SAT (which are clones).

I am not affiliated with them in any way. I just learned about them today from an engineer that I work with, and he used to work for them a few years ago. He told me they are a smaller company that does primarily premium fleet products, but will sell to individuals.

OK----
I'm still new here, and that's probably why I'm really confused now.
I have a new 06 LBZ right now it has ~4000 miles. I was going to change the trans fluid at 5k and put Transsyn. Should I or should I find a bunch of Dex-6 and use that??? I have nothing to pull and truck is highway most of the time.

When servicing the transmission you are not going to be draining all of the fluid so the question I must ask is what fluid is in the pan of my new truck. When I service it I want to put the same stuff that came in it back in so it matches the fluid that was left in it. If it has allison Transynd then I will go to the allison dealer and get that regardless of cost competitiveness but I only imagine GM put their Dex VI fluid in it that they put in all of their new vehicles.

Beginning with the 2006 model year, ALL GM car and LD truck automatic transmissions come with DEXRON VI from the factory. To date, this is the only fluid that has been approved by GM for these transmissions.

There's been a lot of discussion here about using TranSynd in the Allison trasmission, and Allison does recommend using it in their transmissions. But Allison also says that the transmissions in these trucks are warrantied by Chevrolet and GMC. So far, I have not been able to get anyone at GM to officially commit in writing that using TranSynd won't void the warranty.

I have NOT read about GM voiding anyone's warranty simply because they used a different "High Quality" fluid. However, it's my understanding that TranSynd IS DEXRON III approved, so there should be no problem using it on an earlier model year Allisons. But if you have a 2006 or newer truck and you want to be absolutely sure, you'll probably have to wait for TranSynd to get DEXRON VI approval. I don't know if or when that will ever happen.

There must be some differences between TranSynd and DEXRON VI, because Allison's website warns NOT to use DEXRON VI in early vintage Allison transmissions. (They have a VIN break point for determining which Allisons are compatible with DEXRON VI)

Here is another TES-295 approved (http://www.allisontransmission.com/service/autoapp/172/viewpage.jsp?ThisPage=3) alternative to TranSynd.

Autran Syn 295 (http://www.bp.com/liveassets/bp_internet/lubricants/bp_north_america/STAGING/local_assets/downloads/b/BP7097.pdf) from BP

I don't know how much it costs or how easily it can be found, but I suspect your local BP dealer should be able to find out for you.

Ray Mich:
Do you know whho is making the Dex-6 oil in the GM bottle?

Ray Mich:
Do you know who is making the Dex-6 oil in the GM bottle?


Well, I just went out to the truck and looked at a quart bottle of GM DEXRON VI that I have and all it says is:GM VehicleCareDEXRON® VIDistributed by General Motors Corporation.No other information about who actually makes it. Sorry!! :(

On Edit: I just found this on line
GM's DEXRON® VI is made by Petro-Canada and was developed in cooperation with GM of Canada.
http://www.whitfieldoil.com/downloads/PetroCanadaDEXRONVITechBulletin_1.pdf:

I'm VERY new to this forum and somewhat new to owning a diesel truck. I really love my new to me truck (2006 Chevy 3500 EXT cab SRW with now with 28,000 miles). The previous owner changed the tranny fluid at 14,000 miles, and I am wanting to change it again soon. I fully intend to keep this truck for a long time. It appears from reading the stuff in this thread, the way to go is with Dex VI until the warranty is up. The previous owner used GM fluid (changed at dealership)

#204SAT ALL TRANS SUPREME
Multi-vehicle fluid for automatic transmissions,
North American and most Asian and European vehicles.
Premium fully synthetic fluid that provides upgraded performance.
Simplifies consumer choice and reduces inventory.

#205 Dexron VI

For those automatic transmissions that require a Dexron VI licensed product.
Schaeffer’s license number is J-60325



DEXRON-VI is not suitable for Allison transmissions.
Allison issuing TES-389 which would be equivalent to DEXRON-III H.

ATRA tested or had all atf fliuds tested and DEX VI outperformed them all in every aspect

and what i have heard, dextron is the leading killer of the dodge 48re trans....interesting

When switching to TranSynd the Allison dealer told me it takes two drain and fills to completely replace the old fluid and start the extended change intervals.

My local GM dealer has TranSynd jugs in the parts dept so I can't see any warranty issue by using it.

There is some IH branded "transynd tes-295 approved available at ih truck stores much cheaper.

DEXRON-VI is not suitable for Allison transmissions.



Where did you get this information?

Do you have a link to the Allison website stating this?

My 2006 Allison transmission came with DEXRON-IV from the factory.

I've gone around and around with GMC on this issue and to this day, DEXRON VI is the only fluid that GMC will acknowledge for use in my transmission.

and what i have heard, dextron is the leading killer of the dodge 48re trans....interesting

i dont know about the leading killer but im sure its on the VERY large list of things that do, including any type of power/load, or movement whatsoever :nutkick::naughty:

also, i have a sheet from allisons website that states the dexron-VI is very suitable for 1000 and 4000 series allison transmissions:)

and what i have heard, dextron is the leading killer of the dodge 48re trans....interesting
From what I've read, the Dodge 48RE will fail with ANY fluid. :D

When I had a trans heating issue with my new '07 3500 Classic, the Chevy dealer told me that while Chevy will not do it for me (as long, slow, steep pulls with a trailer are not an issue for most people — as they explained it to me), it would be a good idea to add the deep pan and the Transynd fluid and perhaps another cooler, as "Transynd handles heat better." Dealer went on to say, "All of our big trucks come with Transynd." While such words are not stuff that you can take to court when a warranty is denied, I did find it interesting. Too, a call to Allison suggested that I take a close look at my present fluid (said Transynd looks like Dex but with a slight golden tint to it IIRC) since it may already have Transynd in it. It doesn't, but Allison didn't see an issue with the Transynd vs the Dex VI. When I explaind my problem to Allison, the response was, "We've see that issue." They too recommended Transynd and the deep pan. I bought the deep pan and filter/sump and am going to change to Transynd.

Has anyone used the synthetic Amsoil instead of Transynd?

Howdy; Just picked up five one gallon jugs of Coastal Dex III ATF. 37K, and I tow a heavy fiver. Should I stick with Dex II or go with VI? Thanx in advance.

Buy the amsoil I got 1mpg more with it the stuff is great!

I just did a service last night and Im short a few quarts of DEX6.....Its Sunday and need to work tonight. GM dealers are closed...I cant seem to find DEX6 anywere but GM....Any ideas on what to do?

autozone has it atleast here in florida

Thanks CDR. I think I will. I have it in everything else. I'll wait until I swap out my standard Allison 5 speed for the Suncoast 6 speed conversion kit that can handle 1000 ft lb torque. Thanks again.

Where did you get this information?

Do you have a link to the Allison website stating this?

My 2006 Allison transmission came with DEXRON-IV from the factory.

I've gone around and around with GMC on this issue and to this day, DEXRON VI is the only fluid that GMC will acknowledge for use in my transmission.

He probably got that from the Allison Transmission Service Information Letter (SIL). See below. This letter represents Allison Transmission's position for their commercial service vehicles. Since GM puts the Allison in their trucks and pays the warranty, their position can be different than Allison's.

From the Allison SIL:
SIL 10-TR-99, Rev. F
January, 2007

Fluids and Specifications:
Allison Transmission recommends that all customers use TranSynd™ or TES 295 equivalent fluids to extend drain intervals and enhance transmission performance and durability in all operating environments. Customers may continue to choose from a wide variety of Allison-approved fluids.

General Motors no longer licenses DEXRONŽ-III fluids effective January 1, 2007.
DEXRONŽ-VI fluids may be used in the 1000 and 2000 Product Families transmissions beginning with S/N 6310670488 and 6320784373. DEXRONŽ-VI fluids may be used with the 3000 and 4000 Product Families transmissions beginning with serial numbers 6510717075 and 6610220990.

DEXRONŽ-VI shall NOT be used in Allison 500, 600, or 700 Series transmissions (AT, MT, HT/V/CLT products).

Schedule 1 TES-389 and DEXRONŽ-VI fluids will have the same fluid change intervals and will be the same as the current Allison approved Non-TES 295 fluid intervals.

He probably got that from the Allison Transmission Service Information Letter (SIL). See below. This letter represents Allison Transmission's position for their commercial service vehicles. Since GM puts the Allison in their trucks and pays the warranty, their position can be different than Allison's.

From the Allison SIL:
SIL 10-TR-99, Rev. F
January, 2007

Fluids and Specifications:
Allison Transmission recommends that all customers use TranSynd™ or TES 295 equivalent fluids to extend drain intervals and enhance transmission performance and durability in all operating environments. Customers may continue to choose from a wide variety of Allison-approved fluids.

General Motors no longer licenses DEXRONŽ-III fluids effective January 1, 2007.
DEXRONŽ-VI fluids may be used in the 1000 and 2000 Product Families transmissions beginning with S/N 6310670488 and 6320784373. DEXRONŽ-VI fluids may be used with the 3000 and 4000 Product Families transmissions beginning with serial numbers 6510717075 and 6610220990.

DEXRONŽ-VI shall NOT be used in Allison 500, 600, or 700 Series transmissions (AT, MT, HT/V/CLT products).

Schedule 1 TES-389 and DEXRONŽ-VI fluids will have the same fluid change intervals and will be the same as the current Allison approved Non-TES 295 fluid intervals.


Very intersting!

Thanks Crafty1. That's why my '07 has TES-295 fluid in it and not TES-389, Dex VI. While everyone else is worried about "warranty", I'm concerned about my transmission's longevity beyond 100k miles...

BoiseRob

Let me start by saying I love my truck. Any decision to use a product is well scrutinized and thought out. I don't run bully dogs,banks or any other high HO products. I do pull heavy, 15000 lbs 40 ft 5th wheel. I like synthetic oils, prefer mobil 1 in the crank case and transyne in the transmission. On it's worst day synthetic will out perform regular dino oils, period, It take much higher temps to break them down period. GM claims DEX VI is a semi sym, OK How much Syn? I keep hearing obout warrenty issues or concerns. Does anyone know anyone that has been denied warrenty serice on thier Allison because they used Transyne, or any other product for that matter. The dealership wants your broken transmission in for warrenty work. They truely don't care that your not loyal to thier GM branded fluid. I like the idea that the fluid I'm using is also in the Mack truck or Prevost bus or 80000 lb concrete mixer running down the road next to me. If your afraid of the warrenty police then stop by the local Saturn dealership and get your fluid changed. If your truck is a grocery getter your most likely safe. I pull heavy, I choose Allison fluid in my Allison Transmision.
PS The filters for your Allison 1000 Transmission are less than $8 bucks at the Allison dealer. The one and only I purchased at the Chevy dealer was $43. SAME ALLISON FILTER Are the warrenty police listening?
Sorry for the rant, Happy motoring

for me the clincher is allison recomended service interval. from the 1000 series owner manual the following is the fluid change recomendations.

for non TES-95 fluids (Dextron II/VI) service interval is 50K miles normal service, 12K severe service.

for transynd it is 150K miles normal service 75K severe service. says something about transynd.

for me the clincher is allison recomended service interval. from the 1000 series owner manual the following is the fluid change recomendations.

for non TES-95 fluids (Dextron II/VI) service interval is 50K miles normal service, 12K severe service.

for transynd it is 150K miles normal service 75K severe service. says something about transynd.


agreed ^

i may be using transynd now that I know that it can extend you drain intervals. are you guys sure that it is dextron VI now? i am reading on the allison tranny website and it says dextron III?! but i guess i can ask my local dealer just to be sure. how easy is it to change your tranny oil i have decided to start doing my own repairs now since the dealer charges crazy money for a job an idiot can do.

i may be using transynd now that I know that it can extend you drain intervals. are you guys sure that it is dextron VI now? i am reading on the allison tranny website and it says dextron III?! but i guess i can ask my local dealer just to be sure. how easy is it to change your tranny oil i have decided to start doing my own repairs now since the dealer charges crazy money for a job an idiot can do.
At this point in time, TranSynd is NOT Dexron VI certified.

At this point in time, TranSynd is NOT Dexron VI certified.

There is obviously much going on regarding Dex VI and Transynd that is not out in the open. The folks who make the transmission recommend Transynd for all of their transmissions. The 1000 is not excluded. But Dex VI is OKed for some of their transmissions but not recommended for all of them. Both Chevy and Allison told me to put Transynd in my '07 Classic to help with the trans heating issue that I have explained elsewhere in DP. Why GM LD trucks have not certified Transynd (while putting it in all of the GM trucks above the 3500) is what would be interesting to learn about. I can only suspect that marketing has a lot to do with it — as well, perhaps, as GM's sale of the heavy equipment component of Allison. Does anyone seriously imagine that there's someting in the Allison 1000s used in GM LD trucks that is not in the other Allison 1000s such that Transynd would hurt something. After all, Allison does not say, Transynd should not be used in GM LD trucks. They only refere you back to GM. And I went back to GM (local Chevy service), where I was told to run Transynd.

I can only think and wonder if the internal Tranny seals that GM used or is using on their 2500/3500 LD duramax/allison may not be compatible with the higher grade synthetic oil. Remember they spec their transmission materials, have it made to their spec and assemble it even though the design concept is Allison's. BTW, I had two Allison shops and headquarter support reviewed my situation below and they all recommended GM Dealers to look into my issue even though I was using their oil. Also, there may be other internal component differences not known to us since it is a GM transmission. Anyhow, 13K miles after I changed over to Transynd I blew the C1 internal piston seal that caused my C1 clutch to go. Not sure if related but I am still awed by this problem I went through a month ago. I had the best oil inside my tranny per everyone's opinion and Allison's long term recommendation, but my tranny failed with it. I completely changed over to Transynd at 26K and it started failing at 39K. GM provided a goodwill warranty and fixed it. They backed up their product. The tech told me the internal piston seal dislodged itself not sure how, but that caused low pressure and subsequent slips in second and third and limp mode galore. Now I have Dex 6 installed by the dealer after the repair. They changed all the interanl seals and C1 clutch pack and plates, go figure. I plan on leaving the Dex 6 in for a long time until I get a better feel for Transynd later on from others. For whatever is worth, if GM builds it and warrants it, I will keep it to spec for now on since they have extended my tranny warranty 12/12. And yes the GM tech who worked with my dealer tranny tech knows they filled it with Dex 6 and they were fine with it since everything was brought up to their current spec. I asked a lot of questions cause I do not want to go through this experience again.

I can't imagine how using TranSynd could have hurt your Allison transmission. I would say that is merely a coincidence.

As to why GM is not using TranSynd in the Allison 1000 transmission for the 2500 and 3500 trucks, I would say it's a matter of cost plain and simple. It costs them a hell of a lot less to use DEXRON VI which was developed by GM in conjunction with Petro-Canada and Afton Chemical Corporation compared to what it would cost them to buy TranSynd from Castrol.

The fact that GM does not specifically recommend TranSynd the same way that Allison does, tells me that they are too damn stubborn to test and validate anything that would compete with their DEXRON VI, when they can get royalties from anyone who uses the DEXRONŽ VI trademark.

Unless Castrol decides to get DEXRON VI certification for TranSynd like they did with DEXRON III, in order to say that it is approved for the newer GM transmissions, I doubt that GM will outright recommend it. GM has made the specs for DEXRON VI a lot more specific. It is now a lot harder for the oil companies to make a universal ATF that is, for example MERCONŽ and DEXRONŽ VI compatible, so unless the other transmission manufacturers make their specs a lot closer to the GM specs there will be many more different type of ATF out in the market and the cost to the consumer will definitely go up.

Yes, it really sucks when we know that TranSynd is a Superior product for the Allison transmission, but in reality, that's the way corporate marketing politics works. I also doubt that GM will be seeking TES-295 certification for DEXRON VI anytime soon. They look at TranSynd as a competnig product and if there is no money in it for them, they really couldn't care less. :(

Buy the amsoil I got 1mpg more with it the stuff is great!
did you use the amsoil atf or atd fluid???