Please post yes or no if you've had tranny problems. Also could you please give a brief description of the problem and the fix. Thanks..........................SWH...

Yes

Park Nuetral Position Switch (NSBU) last summer.

Switch replaced under warranty...................SWH...

YES

Limped it twice once towing 5500 lbs,once empty.
Suncoast coming soon.

Yep, thanks to a quad 215 tune and my hot juice on 5 she was toast at about hour 28 of ownership.):h Problem resolved with new warranty tranny, removing quad and turning the juice down(expect for truck pulls). Problem will be resolve correctively in the next month with ATS stuff.:ro) Matt

No problems except clutch slippage when stock.

Yes.

When backing up in a parking lot, check engine light came on and truck would not shift out of first gear. First time with about 1400 miles on the truck and then again 100 miles later. Second time they replaced entire valve body on the transmission. That seems to have fixed the problem. Now 13,000 miles and no problems since the valve body was replaced. I understand the valve body is about a $1,500 part.

yes

leaking front seel and loose flywheel bolts from factory

See this thread: http://dieselplace.com/forum/showthread.php?t=18791

Trans (Allison) pops out of gear on the 1-2 shift. Though I'm almost 100% positive it's not the fault of the transmission... it's the dealer's fault for not putting the correct amount of fluid back in the truck after they did a flush and filter change on it.

13.5K trouble free miles.

37K miles no trouble

28K no problems other than dealer did not put the magnet back on after trans flush.

7K - no problems

Since approx. 900 miles, tranny would not engage into reverse when sitting for 5 to 10 days in garage (intermittantly). Never was a problem after warmup or daily driving but I thought it needed to be repaired (converter drain back). Now sits at dealership waiting for fix--I hope. Other than that, tranny has been very dependable and I love the grade braking feature when towing my 9500# travel trailer.
Richard

4000+miles no problems

No! 40k and flawless!

Yes. At about 7K miles the tranny would take an extended amount of time to shift into gear. It set a code (don't remember what it was). Anyways, the fix was change the spin on filter. I had changed it at 500 miles, but the dealer said it should be changed at 5k. I now have 33K miles and no problems towing my 9500LB 5ver with the Banks Stinger Kit (Otto Mind, Big Head Wastegate, 4" exhaust & guages).

JP

I had a "shift range inhibit" mesage at around 15000 miles. The fix was not the NSBU but the ignition switch. The tech had the tech II on when he noticed that when he transitioned from park to drive that there was a voltage drop of 5 to 6 volts to thru the part of the ignition sw that supplys line voltage to the tcm. Anyhow a new ignition switch fixed the problem..

A fellow in Boise had the same problem and the dealer couldn't fix it untill he read my post and relayed the problem to them. A switch cured his as well.
I also had the trans replaced at 600 miles for a leak. Since them no leaks and works perfect. Now has 17,000 plus miles on truck and trans.
Denny:D

01
68000 miles
no problems

limped mine on the 40 hp setting while pulling 15k. before limping i had no problems with 50k on the truck. thanks to Mike L. i now have a suncoast stage 3 and a tts converter. now i can play the way i want to.

27k with no problems beside a NSBU switch going south at a few thousand. At 27k i put the SC level 3 in and havent had any problems since with 35k on it total now.

edit: uptill I got the SCIII I ran a 90 hp juice, after the SC I got a hot juice and then shortly after a TTS extreme:ro)

6000 with no problems

I have a story about my buddy's trans. Not sure of the miles though. It's an 02 2500HD LB7 with the Ally. He took it to the dealer because after stabbing the throttle to race away from a light, the truck wouldn't shift into a higher gear and was holding very high RPM's. Only way to get it to shift was let the truck glide for a little then pick up the throttle easy. This happened numerous times. The dealer changed the fuel filter! Problem solved!

Here's one to keep in your hat!!!

90,000 KLMs, nothing yet. Had a scare, but turned out ot be nothing.

2002 with 58,000. No problems, but I am adding the juice/attitude this weekend.

70k NSBU switch at 38K and a couple of limps juice set on 5 and doing stuff i wasn't suppose to do with a stock tranny. dave

NSBU at 30,000, no other problems...

33K no trouble at all

Yes, did'nt come from the factory modded. Fix Suncoast stagev.:)

35000 miles only one limp with courtesy of 120hp Predator tune. Been bullet proof otherwise.

YES

Torque Converter bearing at 105,000. Yes $1100.00 worth
But thats it
2001 Chevy E-cab 4x4 8.1/Allison LT

Nope! 150,000 miles - However, I want to upgrade!

I just bought a 02 dmax w/50k on it. I had a driveshaft vibration in it. (posted these forums) dealership finally fixed it(N/C warrantee) after almost 3 weeks. After driving it less than 2 weeks, the tranny slipped going into 4th ( PO700, 734) Tranny place said a pressure seal had a groove wore into it thus loosing pressure causing the problem. Also the primary clutches showed some burning. Their best guess is that it looked like it may have been run low on fluild at some point in the past. This the same shop that replaced a seal, bearing housing & a bearing in the final drive right before i bought it. The result of a vibratiing Drive shaft.(looks like it never got fixed) Which this latest problem could have in part been caused by this. End result...complete rebuild(N/C warrantee) Will get it back tomorrow. Vin records show no piror problems with this truck. All i know is that i've owned it for 6weeks & have only drove it about 2 1/2 of these weeks. I sure hope this gets better & no worse!!!

Limped it and glazed the clutches. I'm baby it until I go Co-pilot ATS or Suncoast. Cha-ching!!

38k the nsbu switch went out.

No problems as of 31,000 miles.

10650miles, tranny wouldn't shift out of 1st ,would up shift but would whim, got home very slow about 2 miles, Had it hauled in they said 1st gear shift pack needed some parts. Instead of fixing they put in a new tranny. Works fine now. Up tell this it worked good. Towed some pretty good loads on my 28ft flatbed gooseneck trailer. Don't know what the weight could have been it fit on trailer and go, worked good

26K with no problems. Tow 12K 5th wheel for approx. 15K. Changed spin on filter at 5K and added ODLO. Great trans! Will flush and change to TranSynd soon.

One problem on the stocker, bad o-ring on the VSS, it leaked a little. Replaced o-ring, problem solved. No problems 20K miles. Suncoast IV, no problems 25K miles.

27000miles no problems 90hpjuice 11000miles:ro)

NO problems
15k
Predator 120 Limped it at 10k, been on the 85 tune since.

53,000 edge attitude since 500 miles or so. Level 5 most of the time. added quad 215 for dyno and fun. NO PROBLEMS!!!!!!!!!!!!!!!!!!!

I had no problems at all until I started running a big VA box. So self induced problems only.

2001 8.1 had torque converter replaced at about 30K miles. Tech at dealer said he heard faint abnormal noise. So far as I knew it was running fine. The 04.5 LLY with the Allison is doing well with 10K on the vehicle.

13.6K, replaced spin-on at 5K, trans shift is smooth as butter. No problems so far.

Almost 5k miles and no issues.

55000 miles and no problems.

2002 73,000 miles totally troublefree towing heavy (up to 33,000gcvw) using transynd fluid (changed every 30,000 mi)and deep pan. When sold, trans was like new. No performance mods.
2005 5,000 miles no problems. No performance mods.

2002, 36,500mi, intermittant drainback problem since 800mi. Have Hypertech III since 22,000mi. Just got it outa the shop so, hope it's fixed now.

50,000 Miles No problems.

Yes, same problem twice now, first time was last April when the truck had 14,000 miles on it and now last week. Transmission Trim A Pressure sensor selanoid. First time just the check engine light came on, last week the truck went into limp mode and the check engine light came on, have close to 25,000 miles on the truck now - completely stock, hardley ever tow. Seems statistically significant with the same part going twice and right around the same mileage (10K)? Anyone have the same problem or some insight? Truck is a 2003 Chevy 2500HD 4x4 extended cab.

16K + miles on stock trans and no issues to speak of. Hopefully it will stay that way...

Fisrt week i owned it less than 200 miles, Bad front pump seal and torquecoverter bolts also replaced some seals and gaskets, 5800 miles now and no problems, The best thing about the deal was GM gave me a extended tranny warrenty to 5 year or 75,000 miles to make me happy.

62,000 miles and 1 problem. DTC P0700 and P1860 (torque converter clutch pulse width modulation solenoid). Replaced solenoid, couldn't reset SES with scan tool but codes cleared after about 50 miles driving? Everything else seems in good shape.

12k + juice @ level 4 no probs

Bill

2002 @ 135,000km

NSBU @ 45,000km
NSBU @ 85,000km
Torque Converter leaking oil by one of the 6 flywheel attachement block @ 108,000km

Put a Transgo & Tripple disc in to settle the problem once and for all.

2002
NSBU @ 95,000 km
Valve body @ 115,000 km

2004
No problems @ 27,000 km

Yes.
At 60K miles limped it while driving on wet roads.
New NSBU switch (brown one) fixed the problem.
Now at 92K miles.

Gary

something that might be useful info here is where you got your tranny stuff... did you?
-buy a complete tranny from ats?
-buy a kit and do it yourself?
-buy a kit and have a tranny shop do it?
-there's plenty of other ways people could gone about doing it

i bought the complete tranny from ATS, in the beginning i had a front seal leak i guess. but i did the install so it could have been my fault. pulled the tranny back out and changed the seal. working great after that.

I have a story about my buddy's trans. Not sure of the miles though. It's an 02 2500HD LB7 with the Ally. He took it to the dealer because after stabbing the throttle to race away from a light, the truck wouldn't shift into a higher gear and was holding very high RPM's. Only way to get it to shift was let the truck glide for a little then pick up the throttle easy. This happened numerous times. The dealer changed the fuel filter! Problem solved!
I had this same problem and thanks to this post it saved me a trip to the dealership! I thought I had some serious issues. Can't believe it was just a bad fuel filter!

24K miles no probs.

No troubles, 58000 miles on my 04.5 Dmax LLY

17k no problems got the predator at 15k running the 65 hp tune since, no problems so far

24,000 miles with no problems:)

2003 D/A

8500 miles with no problems. Solo driving and approx. 2000 miles pulling 5th wheel trailer.

YES

Limped it twice once towing 5500 lbs,once empty.
Suncoast coming soon.
Update,limped two more times on Christmas eve within 5 minutes of each other,both times empty with Edge J/A on 5 and Predator on 65hp. Second time brought a SES light that won't clear with Predator's scanner.I believe the code was 1070 TCM malfunction.

455,000 miles on 5, no problems other than a little quirky. Boxes on all at one time or another and pulling more weight than I should most of the time.

02, 66,000 no problems, 100% stock. Routinely tow 8,000# work trailer and/or 8' cabover camper.

None.

18 000 km and no problems so far!

Yes - 58k

5K no problems, all stock.

15K No problems, smooth as butter even when towing 4500#. Best engine/trans combination I've ever owned.

10,000 miles - Got a SES light while towing, slowing down in town and coming to a stop at a light. When I pulled away from the light, the truck seemed to be slipping the tranny bad, then once the speed got up it hooked up and shifted through upper gears and did fine on the road, just didn't have any power and wouldn't pull over 65MPH. When I got home and shut it down, restarted later, and drove the dealer with no problems, but I wasn't towing either.

Dealer report:
FOUND TROUBLE CODE P0747 TRANS PRESSURE CONTROL SOLENOID STOCK ON IN THE HISTORY DATA CALLED TAC CENTER WITH CASE #7732965 AND RECOMMENDED TO CLEAR TROUBLE CODE AND ROAD TEST VEHICLE AND IF CODE DOES NOT RESET INDICATE GLITCH PROBLEM AT THIS TIME TIS UNDER INVESTIGATION K9995

The Service manager told me on the phone when he said that GM knew of the problem but has not come up with a fix for it yet. Hasn't happened since, been a few thousand mile put on it and no problems.

Almost 400k on my 02 with no tranny problems at all. No engine or tranny mods.

35600 miles, no problems

21,000 miles no trouble

50,150 miles...................No Problems at all!!

NSBU replaced at 35000 under warranty.

30500 miles, no problems.

78000 miles and the tourqe convertor bolts went for a walk and took the front pump with them. Cost $6500.00 to get them back so I could sell the truck and buy a 04 GMC.):h

78000 miles and the tourqe convertor bolts went for a walk and took the front pump with them. Cost $6500.00 to get them back so I could sell the truck and buy a 04 GMC.):h
What did they do for that money. You could have had a Suncoast Level 5 and taken your family on a vacation for that.
mike

I have the banks six-gun and the magnaflow 4 inch exhaust and i'm on my 2nd Allison in 48000 and ready for my third. I just got my 6 gun 5 days ago so the tranny will prolly be gone pretty soon. Does anyone know a good torque converter that would stand up to my programmer?

45000 miles of fun and abuse no problems what so ever Suckers!!!!!!

No real problems it can slip with the 100 horse tune in though. 40,000 miles with 37 inch tires for the first 38k and 35's now.

No problems 13k lly

48K miles. Last Friday after I left the car wash I noticed that the shift indicator light was blinking on the dash. After i stopped, the light would only come on in 1, 3, R. I drove it that afternoon like that and later in the evening it set a code and the truck would only run in 3rd gear.


Dealer diagnosed and indicated the shift range selector switch on the side of the tranny was shorted. They replaced and it's fine now. Not covered under warranty.

Bought my truck used in 2002 with 41K miles. Found paper work in glove box that tranny was replaced at 2500 miles (irratic shifting). No problems to report since I had it other than when truck sits too long (about 5 to 6 days) nose up, I have the dranin back issue of the torque converter and need to reset the ces light.

No problems other than a bad switch at about 65,000.

I am at 8X,000 now and it works great.

01 chevy 6.6, at 104k lost injectors. FYI, g.m. sent out a letter, for sure on certain VIN #'s , as i got one, the injectors are covered for 200k now. They paid for all mine, at 104,000 , Bill would have been 3800 dollars from the man. now at 111,000 i am replaceing the nsbu, it went out 2-11-05, also note tranny was replaced by g.m. while first owner had vehicle at 32k.

17000 trouble free miles.

5000k just wouldn't shift out of 3rd in tow mode pulling my 5er when cold outside temp was 30. other than that no problems !!!

90,000 miles,Switched to AMSOIL Torque-drive & noproblems. pull a 10k 5th wheel on level 3 attitude & level 4 rest of time other than occasional smoke shows

52k only problem was determined to be a loose batter cable when the tranny would suddenly 'pop' into neutral from any gear (very wet weather). Tightened battery cable and no issues before or since. Heavy pulling and lots of high speed freeway trips. My first automatic and I will NEVER go back to manual as long as ALLISON is in business!!

Almost 400k on my 02 with no tranny problems at all. No engine or tranny mods.

Now that is a winner!

Do you use it for hauling?

At 23,500 miles when my truck was totaly stock, I had just delivered a small escavator and was heading home, truck was running great. Pulling away from a stop light at about 35 I put my foot a little into it, there was a loud clunk, loss of power momentarily so I let off on the peddle. I continued home but the tranny was stuck in 3rd gear. Took to dealer and they found pieces of clutch material in the tranny fluid, so they rebuilt the tranny. Dealer said it was uncommon occurance with the Alison tranny. This was before I discoverd "The Diesel Place" and now I know a lot more about what really happened. However I am suprised that I could "limp" the tranny stock and not even using WOT. I am hoping there was just a bad clutch and the new parts are better than the original ones!

Been running Juice/Attitude for a month now with no problems.
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Of course, at 36,500 miles the tranny/tc took a dump on the way to Vegas while towing my 5th wheel. Truck is totally stock, except for Monster Exhaust. No power enhancements.

When I got to Inglewood to have Mike L. work on it he said the tc was the most "burned" he had seen in 30 years of doing tranny's.

However, a Suncoast Level 3 cured any future problems.

None 62000 miles

YES. Converter Drain Back. Fix by extending idle time on initial start-up.

my dad has 4X000 on his and had zero problems my cousin is in 7X000 on his and no problems uncle had had 9x000 on it when sold and went to an 05 and no problems and one duelly with i have no idea how many on it.... our family is in the excavating business so all of these have seen a fair amount of bumper time and they all are constantly hauling a 100 gallon of fuel in the bed as well as a tool box and a cooler.

my cousin has a 95hp chip in his with a load leveler for that dozer he loves to hook on to with a pintle hitch.......we all hate dump trucks and would much rather use the 450hp volvo or pickups for smaller stuff..... if we thought we could servive a wreck in a pickup hauling a dozer we would do it all the time.

oh btw these were are 02's with the lb7

16000 miles no problems

30,000 no problems

I pulled my Ally down 3 weeks ago and found C3 burned. My truck was never beat on and never saw more than 80 hp. I had no slippage, but I was installing a TTS Extreme program. Where does that put me in this poll? Did I have a potential problem? Yes. Does it count here? How many others have lurking problems that may or may not show up? Most stock Duramaxes will go many miles without a trans problem. Weakest link will be the torque converter. You guys that tow heavy loads, change your spin-on every 5K. That little bugger (spin-on filter) is the most restrictive pressure unit on your Ally. Don't get cheap; just change it every 5K.

mike

Interesting thread. This is my first post. I have a new '05 with Allison,and less than 1K on it. OK so far.

I'm looking for tips on how to get the thing to last. A new spin-on filter every 5K goes into the memory banks and will be followed. I appreciate learning that.

A whole bunch of guys had trouble with a nbsu(or nsbu?)switch. Usually at 30K to 40K. What is it and why does it go out? Or should I ask that somewhere else?

Thanks.

yes

leaking front seel and loose flywheel bolts from factory
Were there signs of the loose bolts?

Phantom 99
Every maunufacturer out there is having problems with their NSBU ( or the like) switches. Nothing new.
mike

1042 miles, lookin' good. Bought the 100,000 mile extended warranty, and will sell the truck at around 80,000 and buy a new one anyway, so any issues will be warranty. Predator on 40HP and it will stay that way, it's only there for the hills when towing. I drive for mileage, not for sport, unless I'm on my Mean Streak or my KTM three hunny.........

61,000 miles and no problems, but truck came with wrong dipstick. Had me scratching my head at the fisrt fluid change.:eek:

6000mi ok for now 3 good pulls on it 8000lbs+. no tuner or edge . i do have mbrp 4in .
i agree with spin on filter change at 5k

409k no problems ever not even the NSBU. pulling 70% of the time

409k no problems ever not even the NSBU. pulling 70% of the time

WOW!:ro)

21k and no problems

48,000 miles and no problems.

2002 49000 miles not a single problem. have had the juice on it since 6500 miles set on level 4 in drive, and level 2 in tow/haul mode. I have towed a 6500lb. work trailer about 27000 of the 49k. Love this tranny.
Kevco

18500mi on the clock, no problems. :)

37k, no problems! Love this tranny.

-DMaxEnvy

No problems!

i think the tranny smells burned......what should the fluid smell like 3k 05 d/a

03, 41,000 Toasted C3 and still under inspection for other damage

9000 miles and can slip the torque converter in high gear with a trailer on. ok without trailer. has a bully dog power pup on level 3 and a Bully Dog dyno dominator. wont slip with just the power pup.

02 had funky shifting from day 1. At about 5000 miles,the dealer replaced valvebody.

I Haved owned personally 5 different Ally equipted trucks and no problems as of yet.

NSBU switch at 42k and thats all!:cool2:

03 79k and juice since 35 miles no probs at all. 01 81k no probs at all on that one either except for fuel pressure regulator.

03
31000 Miles
Stock Truck, No towing
No Allison problems

nsbu switch

went in the middle of a good snow storm while plowin

roughly 23,000

2002 62k with Predator on 40hp no problems

No.

Just the other day had predator on full bore.Cruising in third gear stepped on it limped trans po700,po701,po702,po703,po704.Predator would not clear it.Had to use Actron 9135 scanner. Seems to be fine now.

No trouble at all in 53k with '03 Big Block. '05 D/A only 1k so far

02 lb7, no problems yet at 116k, only issue is that on cold days it wont shift into fifth for about five miles, this is when the tranny finally starts to warm up. i thought these trucks were made to pull heavy loads for a million miles? it looks like a lot of you guys use them to cruise town with all your horsepower upgrades. No one really has a high mileage truck that I can see.

No problems at 18k miles, running Transynd and deep pan since 5k, towing heavy at 25k lbs. One smart tranny! JJ :)

02 - 75,000 miles of heavy towing (once at 33,010), off road, beating the wholy ---- out of it, with deep pan and transynd - not one problem. Felt better than new the say I sold truck.
05 - 15,000 miles moderate use, no deep pan, and about ready to change to transynd - perfect in every way.
07 - waiting for 6 speed auto

05 CC dually 4x4 , 814 miles, limp mode, no reverse, check engine light. No cause yet. happened this morning on way to get race trailer. wait 4 hours for dealership to come get and bring loaner. keep posted on out come.

Never had a problem TILL AFTER i answered this thread !!!! I think this survey jinxed me. (&&^^#$@^E%$ Anyway,not sure what it is as yet,have a vibration at 45-55 & metal fillings in fluid. Let ya know next week, going to Mi. to see Eric. Oh Yeah 417k on it.

:muahaha: :help2:

02 lb7, no problems yet at 116k, only issue is that on cold days it wont shift into fifth for about five miles, this is when the tranny finally starts to warm up. i thought these trucks were made to pull heavy loads for a million miles? it looks like a lot of you guys use them to cruise town with all your horsepower upgrades. No one really has a high mileage truck that I can see.


Guess ya didnt see the post on mine. 417k :exactly:

Yes
Park Nuetral position switch at 100k. Not a big deal.

replaced nsbu at 9000. have limped trany 8 times on 230 tune but flawless on 110 tune. vanaaken since 18000 miles now has 65000. want to upgrade trany to see what the 230 tune is realy like

Today trans limped or something no mods just stock with 1097 miles on it. Service writer is good, BUT not to happy taking to a place that says we don't see hardly any duramax or allison's in a year. Great to see alll the competent dealerships today. This is who Chevy recomended? WTF?

21,000 with no problems.

Grandpa has a Kenworth W900 dump truck with an Allison in it... 2,000,000 miles on it, no problems. Yes you read it right: TWO MILLION!!

Dan

To:cool2: man.

Tom, Give me a call, I got a guy in your neck of the woods that needs a trans.

Bill sent me a "e" mail will check it in the morning.

nsbu switch at 41K still trying to get stealer to refund for warranty//

15k miles -- no problems

12K, No Problems

03 silverado 2500HD 26K miles no probs
05 GMC 2500HD 8K miles no probs

Well first of all I'd like to thank all who have participated in this survey I started. The responses are certainly overwhelming. Keep 'em comin'!! It's good to see the vast majority have problem free Allisons or problems covered under warranty.......................HDY...

2001 8.1 27k miles and no problems.
2nd 2001 8.1 10k miles and no problems.
2005 LLY 4k and no problems yet.

Please check here: http://dieselplace.com/forum/showthread.php?t=28651
Thanks:
TomP

when tranny is cold, shifting down toi 1st there is a clunk. after a couple of blocks the problem goes away.

Wouldnt back up once and was hung up in 5th gear. Eng. service light on...14000 mi. Took ground cable off,waited a minute, havent had problem since.....35000 mi now.