Transmission Question---

Mighty HD · May 30, 2004

This has happened twice now. First when I got the truck and it had only 200 miles, and again this afternoon, with 1470 miles.

When at a stop---after driving, and when taking off it feels like the truck is in neutral and then slides into drive. For example, I can ease on the gas and feel the truck make 2 bumps forward like it's slipping on wet pavement, then it will get traction and take off. Any ideas?

I took it to the dealer a few days ago for the rear leaf spring snapping..."cant duplicate problem" Just my luck. Since this dosent happen all the time, I may get the same results until the transmission just falls out..lol

snoman · May 30, 2004

Check the fluid level when it is doing this. A clogged or kinked tranny cooler line could do this too if tranny is getting to hot it will act funny.

Mighty HD · May 30, 2004

I'll check the fluid today after I drive around a bit.

It has a cooler, it shouldnt be getting that hot. I havent even towed anything yet. It is in the 90's with super high humidity but that shouldnt be an issue. I'll keep an eye on things...

snoman · May 30, 2004

Just because cooler is present does not mean it is working as things can happen when trucks are built. Given your simptoms, comfirm its actual operation.

JimWilson · June 2, 2004

Mine does that on occasion too. First time it happened I thought the truck had gotten rear-ended it was so sharp. And, like you, the dealer says "no problem found". But it IS a problem, because you (and me) are certainly not the first people to experience it -- I've seen this same thing posted by many others.

Pewter Pro-Tec · June 2, 2004

There is a recall on some 2004 2500HD's with the 4L80E trans.

Check this thread.

http://www.gm-trucks.com/forums/index.php?...showtopic=29215

c5vetteman · June 2, 2004

Mine did the same thing not too long ago at about 5000 miles. Problem has yet to duplicate itself again. Relatively speaking, the tranny has been babied its first 5000 miles with no towing or hard accelerations.

Shaners · June 2, 2004

My '01 had the same problem. Some times it would "chirp" the tires when it dropped into gear.

I took it to the dealer, and he actually could duplicate it!!! It also acted up on the Technician too...

They reflashed/programmed my tranny over a a year and a half ago and the problem has not re-occured.

snoman · June 2, 2004

My '01 had the same problem. Some times it would "chirp" the tires when it dropped into gear.

I took it to the dealer, and he actually could duplicate it!!! It also acted up on the Technician too...

They reflashed/programmed my tranny over a a year and a half ago and the problem has not re-occured.

I really do miss the old non ECM controlled automatic trannies. I like the shifting on my old 89 700R4 better than on my 2000 4L80E and the shifting on my originail THM400 in my J20 jeep is even better yet!