Well two days ago, my cousin came up with his 12 valve, and we were runnin hard all weekend, and i finally found the limit of the stocker...5th gear going up a long grade, with 3 guys, and a jetski in the back, rolled into her to see how much she would take and how much boost i could make before shed limp or if shed limp...got to maybe 3/4 throttle and as soon as my guage touched 25psi of boost, boom! stuck in 4th...gues im not one of those lucky ones with the amazing stockers...haha looks like ill have to take her easy in 5th from now on :(. still rockin the 135 tho :), what do you guys think? think she'll take the abuse in 1-4 for another 4 or 5 months?? thad prolly be the soonest i could upgrade...

what do you guys think? think she'll take the abuse in 1-4 for another 4 or 5 months?? thad prolly be the soonest i could upgrade...


No.

maybe but i doubt it. I would back'er down to 50 and leave it there. Probably still limp on 50.

blow her up and put in a Suncoast.

Does a limp trip any DTC codes? I think I limped mine this last weekend, but checked the codes with the hypertech tuner and none were related to the trans. U1000 and P0234

Does a limp trip any DTC codes? I think I limped mine this last weekend, but checked the codes with the hypertech tuner and none were related to the trans. U1000 and P0234

if you limp the tranny, you'll know it. your rpm's will not go over 2000 and you'll find codes:D

if you limp the tranny, you'll know it. your rpm's will not go over 2000 and you'll find codes:D
Cruise was set at about 75-80 and the truck loaded with 4 guys 3 motorcycles in the bed and one in a very small trailer and all of our gear. Maybe 1100-1200 lbs in motorcycles, 300lbs trailer, 800lbs in dudes, and 100lbs in gear. We start up the hill and about 1 mile up a 3 mile hill the cruise shuts off like something broke. I let the motor coast down and it stays idling and im not sure if I put it in neutral or not. All occupants are concerned, I cant answer any questions other than "I think this is called a limp-mode". Power returns in less than 10-25 seconds and I gradually accelerate until I floor it as people are climbing up my butt. Bam it happens again but this time I have my foot on the throttle. There was an exit handy and I pull over and kill the ignition for about 30 seconds and cross my fingers and it starts again, no problem. We continue up the hill and one more time as I push it less than before POW! the power goes out but returns just like before. Never got a check engine light, nothing. Now we are up on a high plateau and no hills for quite a while to tax us. Stop 50 miles later and lower the power to level 1 on the Hypertech and record/clear those to codes. All goes well the rest of the trip up. On the way home an equally (possibly more) difficult hill does the same thing. I back out of the throttle and the power comes back to normal and the rest of the way home no problems.

Each time no smoke, no radical increase in RPM's, no CEL.

Is/was this an actual transmission limp?

Would it have recorded the slip % so I can see it with some other scanner if it was?

You'll limp it again. Once it limps, it's like cancer, just keeps getting worse. Start saving for a stage 4 build. Oh and would not advise "blowing it up". The cleaner the tranny is on the inside, the easier it is to build with minimal cleaning. Purposely roasting the clutch packs just makes a mess inside the ally.

You'll limp it again. Once it limps, it's like cancer, just keeps getting worse. Start saving for a stage 4 build. Oh and would not advise "blowing it up". The cleaner the tranny is on the inside, the easier it is to build with minimal cleaning. Purposely roasting the clutch packs just makes a mess inside the ally.Like I said Im not convinced it was a trans limp. And I wasnt that hard on it to start with but I will be easier on it in a 4-5th shift and try to be nicer to it all around. I know dirt and contaminates are the enemy, and you never gain anything by flogging it in anger or frustration.

Like I said Im not convinced it was a trans limp. And I wasnt that hard on it to start with but I will be easier on it in a 4-5th shift and try to be nicer to it all around. I know dirt and contaminates are the enemy, and you never gain anything by flogging it in anger or frustration.

X2! I beat the piss out of my 05 after i limped it. Bad idea! It was to the point I couldn't roll any throttle in 5th on a grade or it would limp. I had to lock OD out to climb any hills and take it waaaay is in 5th.

I limped my tranny for the 3rd of fourth time in three years on Friday night. Saturday I put it on a dyno and it wouldn't hold gear when they applied load. Driving around town it's fine. I have 80k and am wondering if anyone has had any warranty issues? Any advice???

Warranty will just provide you with another "stock" tranny that you will limp again in the future. Save your money and get a SunCoast stage 4 kit and never look back.

I limped my tranny for the 3rd of fourth time in three years on Friday night. Saturday I put it on a dyno and it wouldn't hold gear when they applied load. Driving around town it's fine. I have 80k and am wondering if anyone has had any warranty issues? Any advice???

You'll limp it again. Once it limps, it's like cancer, just keeps getting worse. Start saving for a stage 4 build. Oh and would not advise "blowing it up". The cleaner the tranny is on the inside, the easier it is to build with minimal cleaning. Purposely roasting the clutch packs just makes a mess inside the ally.OK, sorry to hyjack, but like I said Im not sure it was actually a problem with the trans. THIS WEEKEND I towed 7K+ Hypertech set on level 1. On flat and level ground, Scottsdale northbound on the 101 cruise set at 65 the truck limps, (like someone shut off the cruise control) no throttle response for about 10 seconds and I pull over to check/change it, but decide to continue as no CEL or SES lights are tripped. Continue 10 miles more exact same thing, only this time I get a SES light (Servie Engine Soon). Pull over and remove Hypertech tune and clear P0234 code, this is an Overboost code, (absolutely NO difference in the max boost "22psi" while the tune is installed or not). Continue on our trip. On the way up to flagstaff 2 GIANT climbs (well over 1000 foot of altitude gain in less than 4 miles) and one giant one on the way south. Absolutely NO issues, other than the temps climbing when I push it NO PROBLEMS AT ALL. Once at the top of each hill, temps drop like a rock. Engine @ 190-200 and Trans @ 190-210 all the way up. On the way down, Engine at 190 Trans at 185-195. Engine maxed at about 240 or so 235 the other few times. Ambient max temps @ 95 on the way up and 90 or so on the way down.

Back on 4th of july weekend I left it on level 2 and had a small enclosed trailer maybe 2500 Lbs total not including 500lbs in passengers and gear (total) and as long as I kept it below 65mph on the climbs it would stay in 4th gear and never throw a code. Im guessing because the fuel pump RPM was up and didnt draw air or was able to account for the fuel leak I have in my fuel prime assembly.

Here is the story of my leaking fuel prime assembly
http://www.dieselplace.com/forum/showthread.php?t=321794

Mine stuck in 4th or 5th gear.. and will not shift out.. any ideas?? Later came an overheat.. wont shift even after being shut off and codes reset.. still throws the same codes.

Man you have WAY more mods than me. This is just wild ass guess, but other cars that I have known to get stuck in a gear with a TCM, (transmission control module) was because the TCM took a crap or it blew a fuse. Thats usually the mode of failure when an electronically controlled trans gets stuck in a gear.

It (the TCM) either lost power or fried/failed.

Like I said this is a WAG.
Mine stuck in 4th or 5th gear.. and will not shift out.. any ideas?? Later came an overheat.. wont shift even after being shut off and codes reset.. still throws the same codes.

On an unrelated note I replaced all of the rubber fuel lines up on top of the engine. All of them showed signs of dry rotting and Im crossing my fingers that this will solve the problem. $35-45 in fuel lines and 4 hours of work (multiple sizes of long needle nose pliers are a MUST). I will post picts later.

I thought about that. As I said I tried to drive it a bit after the failure.. I checked the module.. I kinda thought that might be the problem at the time, but was unable to tell for sure. thanks for the tip. :)

Now I just need to find one and see how much they run

i love reading the trans problem stories from a while back with the guys still running hot tunes after a limp....strangely almost all of them now have a built transmission or havent been seen around the diesel performance area in a while...haha.

hot tune on a stock trans is a recipe for a built trans...no way around it...no cheap alternative. tired of all these guys saying...i destroyed my trans and have $1000. tell me how to make it hold 600rwhp. this is not a cheap hobby.

I expected a rebuild long before I ever added anything to my truck. My truck limped on stock settings shortly after I bought it used. I have unfortunately never worked on an automatic transmission. Rebuilt my 6 speed in my stealth with stouter parts, but not this. I agree any time you go over stock power you have to expect something along these lines. :) If I hadn't ripped my transmission line from the radiator when I hit the bear I might have made it out a little better. However ripping that out caused overheat on both engine and trans.. :( And that fully sucked.

i got a ppe hot tuner and mines been doing it for the past 6 months and me beatin the piss outa it i cant even get on it in 5th anymore at all..... saving for the new one as we speak lmao but ya dont beat the piss outa it BAD IDEA

I have been running mine on 135hp, if your smart it will last and if your not well you guys get the picture. It is no so much the tune as it is the DRIVER.

You'll limp it again. Once it limps, it's like cancer, just keeps getting worse. Start saving for a stage 4 build. Oh and would not advise "blowing it up". The cleaner the tranny is on the inside, the easier it is to build with minimal cleaning. Purposely roasting the clutch packs just makes a mess inside the ally.

Exactly what George (BD) told me. Most of the time in the build is cleaning and preping. when he installed my trans he told me that it was beat on. He also said that it was not good to keep changing between tunes because the trans has to keep relearning and that puts were and tear on the clutches. When i had the stock trans I had the PPE HOT+2 for about a year and a half, and it never limped when i didn't have a trailer on the back. when i put the trailer on there i limped it towing 12000 pounds, but i knew i was gonna because i got on it a little more then i should because there was a dodge next to me pulling a trailer also. What it comes down to is knowing the truck and its limits. and then biting the bullet and rebuilding it and never look back. The trans built is like no other mod you can do, sure it doesn't add hp but its the spine of the truck. without it you cant move.

Exactly what George (BD) told me. Most of the time in the build is cleaning and preping. when he installed my trans he told me that it was beat on. He also said that it was not good to keep changing between tunes because the trans has to keep relearning and that puts were and tear on the clutches. When i had the stock trans I had the PPE HOT+2 for about a year and a half, and it never limped when i didn't have a trailer on the back. when i put the trailer on there i limped it towing 12000 pounds, but i knew i was gonna because i got on it a little more then i should because there was a dodge next to me pulling a trailer also. What it comes down to is knowing the truck and its limits. and then biting the bullet and rebuilding it and never look back. The trans built is like no other mod you can do, sure it doesn't add hp but its the spine of the truck. without it you cant move.


This was an excellent post. I abused mine overly hard with loads and my ppe hot +2 on setting 3 all the time (5setting ppe). I had slippage.. but it lasted a long time. I just back this statement up with after a slippage dont wait till its completely gone.. I went 2 1/2 yrs on mine limping.. it just sucked.. Never had a 4th gear slip but had the 4-5 too many to count. 0-65 you could push as hard as you wanted but on that following shift back out. .02 cents worth save and fix

Mines still going after 9 months of crazy tunes. Its still working just as it did the first day I put the tune on. Im just to addicted to take the tune off... So if my tranny goes before spring im prepared to park the truck untill I get my tax revenue cheque.

Cant wait to be able to open her up in 5th, I seen a video on Nicks site and I love just watching that guage go from 60-100 in no time at all... it gives me goosebumps...haha

Once you get the tranny its a different animal. You will love it. Then it becomes very expensive to proceed with building.

i was jus reading my old thread and realized how lucky ive gotten with my stocker. i lft it on the 135 tune since i limped it, and its now october...(4 months) later and shes still runnin awesome. i think it acutally learned more and more the longer i let the tune in...idk. maybe i jus know its limits more. the only problem i have now is i want more power :) lol. jus thought id post for all those who said id destroy it even on the 70hp or even 50hp after the limp haha

i was jus reading my old thread and realized how lucky ive gotten with my stocker. i lft it on the 135 tune since i limped it, and its now october...(4 months) later and shes still runnin awesome. i think it acutally learned more and more the longer i let the tune in...idk. maybe i jus know its limits more. the only problem i have now is i want more power :) lol. jus thought id post for all those who said id destroy it even on the 70hp or even 50hp after the limp haha


The ally does learn the power the longer you drive it. That is why you must take it easy and gradually give it more power until it fully learns.

Hi, first time poster here, have '02 2500HD w/ Ally. I am learning from all this info but can someone pls define simply what "limping" means and how it happens.?

A Transmission goes into limp mode when it senses its clutches slipping due to a discrepancy in the input and output shaft speeds of the transmission. The Transmission then sends a code to your ECM telling it to limit power to keep the possibly that the clutches continue to slip to a minimum. Of course other situations will also cause the transmission to enter limp mode but usually one is referring to this situation when talking about adding power and 5th gear.

A CEL will come on and your truck wil have little power and no power over 2000rpm, it will continue to run this way until the code is either erased or a number of ignition cycles are completed where the fault does not occur (im not sure on how many).

Hope this helps you understand it a little bit better. If not you can PM me if you like.


Welcome to the Forum :)