When I service my transmision I am considering using Transynd instead of the type VI fluid in there now. I don't tow heavey all the time but when I do in the summer with my camper the temp in traffic can reach 200F which is somewhere near where the fluid starts to break down.

How much margin does Transynd give you above type VI before it has problems?

Transynd, being synthetic, will definitely give added protection. MOre resistant to thermal breakdown and better flow properties will do exactly what you are looking for, help keep the temps lower.
I see you use our motor oil. The Torque drive is the same product as transynd but maybe a little cheaper? The ATF, which is dex 6, is what AMSOIL actually recommends for the allison. Benefits of both a synthetic and the improved qualities of a dex 6.:)
Heath

I have used transynd for the last 50,000 miles the tranny runs cooler (10 to 15 f) when towing, it works, in 2001 and 2002 there were many posts praising transynd for its heat disipation never any negatives.

good luck
drive safe

I have a situation-specific heating issue with my '07 Classic Allison. Dealer and Allison both say they know about the situation but won't do anything. Both recommended the deep pan, Transynd, and possibly a larger cooler. Both said Transynd handles the heat better. Chevy noted that "All of our big trucks come with it." Allison thought my 3500 DRW might (should) have it from the factory — not so lucky. BTW, the new Mobile synthetic now has the same rating by Allison as Transynd. Check this http://www.allisontransmission.com/news/Sept2007/331.jsp and the related thread under Maintenance/Fluids

If you're under warranty, I would use a licensed and approved TES-295 fluid. Amsoil is good oil for some applications, but as far as warranty by GM or Allison is concerned, Amsoil is not TES-295 licensed or spec'd.

I noticed a substantial difference going from Dex VI to Transynd. Now that there's more players coming into the approved TES-295 arena, you will see prices get more competative. Now it's Transynd (Castrol/BP), Mobils Delvac Synthetic ATF and the International Truck TES-295 rebranded oil.

Given the cost of these transmissions, I would spend the extra money and go TES-295. I wouldn't want to argue with GM or Allison aboout who's paying the bill because you used a non approved fluid. TRUST me, they will find any and every excuse that can not to pay.

Transynd, being synthetic, will definitely give added protection. MOre resistant to thermal breakdown and better flow properties will do exactly what you are looking for, help keep the temps lower.
I see you use our motor oil. The Torque drive is the same product as transynd but maybe a little cheaper? The ATF, which is dex 6, is what AMSOIL actually recommends for the allison. Benefits of both a synthetic and the improved qualities of a dex 6.:)
Heath

X2...compositionally, the Amsoil Torque-Drive is just as good or better than the Castrol Transynd product - the main difference is the exclusive marketing agreement Castol has with Allison. I use Torque-Drive in my Allison transmission. I've noticed that my transmission temperature is around 20-25 degrees cooler when pulling my trailer.

BigBadAllis - your logic about warranty is correct, but your direction is somewhat flawed.

DEX VI is the only GM approved fluid for all 2006 and up vehicles, including the Allison 1000 in our trucks. TES-295 is approved by Allison, but ironically, not by GM in the light duty (up to 3500) trucks like ours. Allison is no longer owned by GM, and GM says "DEX VI". In fact, Allison service shops are not approved to work on warranty claims for 1000 series transmissions in the light duty trucks (while under warranty); that is reserved for GM dealerships.

The DEX VI and TES-295 fluids are dis-similar enough that if you research the websites of Amsoil, Schaeffer's and others, you can even read statements such as "not recommended" when trying to cross reference one to the other. Odd, since TES-295 is actually a premium DEX III based fluid, and DEX VI is supposed to be backwards compatible with DEX III fluids. Further, Allison has serial number cut-offs for some of their transmission series regarding DEX VI use. Here's a link to an Allison statement on TES-295 fluids and DEX VI. http://www.allisontransmission.com/servlet/DownloadOnDemand?ApplicationID=155&DownloadID=5&Preview=1


This in mind, your logic that you wouldn't want to argue with the manufacturer over warranty issues is correct. But GM says DEX VI, not TES-295. Allison says TES-295 is the best, and they're probably right, but Allison didn't make your truck, they didn't sell you the truck, and they don't warranty the truck; GM does. And GM says DEX VI for 2006 and up in light duty trucks.

Do what you want; it's caveat emptor. If I had a 2007 GM truck with 100K miles of powertrain warranty, I wouldn't risk it on TES-295 fluids. It's not like the DEX VI is a bad product. Quite the contray, DEX VI is a very good fluid, much improved over DEX III. It's shear and oxidation stability are WAY improved. It is a very, very good fluid.

X2...compositionally, the Amsoil Torque-Drive is just as good or better than the Castrol Transynd product - the main difference is the exclusive marketing agreement Castol has with Allison. I use Torque-Drive in my Allison transmission. I've noticed that my transmission temperature is around 20-25 degrees cooler when pulling my trailer.

It's not exclusive to Castrol/BP anymore. There's new players in town on the TES-295 front

It's not exclusive to Castrol/BP anymore. There's new players in town on the TES-295 front

My apologies...I was sure that TranSynd, as a Castrol product, had license exclusivity with Allison. Do the new TES-295 products carry Allison's licensing? I haven't seen any product notifications or updates from Allison regarding other approved synthetic ATF. Where are these other products offered? Just curious.

My apologies...I was sure that TranSynd, as a Castrol product, had license exclusivity with Allison. Do the new TES-295 products carry Allison's licensing? I haven't seen any product notifications or updates from Allison regarding other approved synthetic ATF. Where are these other products offered? Just curious.

It not exclusive anymore. Allison has a press release on their homepage about the new Mobil Delvac Synthetic ATF for Severe Duty. International Truck also has a fluid that is TES-295 licensed as well.

Best regards,

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.

BigBadAllis - your logic about warranty is correct, but your direction is somewhat flawed.

DEX VI is the only GM approved fluid for all 2006 and up vehicles, including the Allison 1000 in our trucks. TES-295 is approved by Allison, but ironically, not by GM in the light duty (up to 3500) trucks like ours. Allison is no longer owned by GM, and GM says "DEX VI". In fact, Allison service shops are not approved to work on warranty claims for 1000 series transmissions in the light duty trucks (while under warranty); that is reserved for GM dealerships.

The DEX VI and TES-295 fluids are dis-similar enough that if you research the websites of Amsoil, Schaeffer's and others, you can even read statements such as "not recommended" when trying to cross reference one to the other. Odd, since TES-295 is actually a premium DEX III based fluid, and DEX VI is supposed to be backwards compatible with DEX III fluids. Further, Allison has serial number cut-offs for some of their transmission series regarding DEX VI use. Here's a link to an Allison statement on TES-295 fluids and DEX VI. http://www.allisontransmission.com/servlet/DownloadOnDemand?ApplicationID=155&DownloadID=5&Preview=1


This in mind, your logic that you wouldn't want to argue with the manufacturer over warranty issues is correct. But GM says DEX VI, not TES-295. Allison says TES-295 is the best, and they're probably right, but Allison didn't make your truck, they didn't sell you the truck, and they don't warranty the truck; GM does. And GM says DEX VI for 2006 and up in light duty trucks.

Do what you want; it's caveat emptor. If I had a 2007 GM truck with 100K miles of powertrain warranty, I wouldn't risk it on TES-295 fluids. It's not like the DEX VI is a bad product. Quite the contray, DEX VI is a very good fluid, much improved over DEX III. It's shear and oxidation stability are WAY improved. It is a very, very good fluid.

Glad your owners manual didn't tell you to jump off a cliff. ):h You still would be under warranty though. :D

Transynd is approved by GM in our Allison transmissions. I talked to an Allison/GM tech rep., He said that GM issued a TSB stating that Transynd is approved. I found this on the Allison site, it is listed under the ATF questions.

http://www.allisontransmission.com/service/faq/index.jsp?CategoryID=11

how much is transynd?

how much is transynd?

At the local Allison dealer they wanted $32/gal or $215 for a service.

My original question was how much extra temperature capability does it have relative to the dex VI. Here I was thinking of the one time temperature spike you might get going up a mountain. It seems to also have temperature lowering capabilities also thus having even greater margin to Dex VI.

Depends, whether it's dex 3 or dex 6, it won't matter as far as temp. Whether it's petroleum based or synthetic will make the difference. Synthetic 3 or 6 will offer better operating temps than a pet. based 3 or 6.

I rather doubt you'll see much difference in operating temps between DEX VI and TES-295 fluids.

I service a garbage truck here in SE Utah that drives 45 mi. one way to landfill elevation change is from 7000 ft. to 5000 ft. with alot of ups and downs between two 9% grades. Truck runs an industrial ally we recently changed from ally's fluid to Lubrication Engineers 7500 power fluid and saw a 17 degree drop in temps. Good fluid can make a difference. An added benefit is that if you have a failure and oil test shows wear as culprit LE fixes the trans.