Duramax/Allison Question

[mschaffer66]

As some of you might know I haven't been driving my truck the past 4 months or so as the woman has been driving it to save miles on her lease.

Well today when coming home from up north I went to pass someone and when i put my foot into it it would rev up a bit, then eventhough i was holding it down the RPM's didn't increase and neither did my speed...just like it was being governed out. I did it a few more times later and it did almost the same thing. Its like it didn't want to upshift.

I also tried it a few times from a dead stop, it would do the 1-2 shift and maybe the 2-3 and it would just sit there and hold the gear without allowing my speed to really increase(it was just barely inching higher), then after 5-10 seconds it would shift and it would pull hard just like it usually does.

Has anyone else had this problem before? Does anyone know about it?

[Yetti]

sounds like a flash issue. have you had it to the dealer for this problem yet? if not theres a new flash for your trans controler waiting

[mschaffer66]

Nope I haven't. About a year ago I had it in and they replaced the trans module.

So are you saying if i call up service tommorow they should understand whats going on and make it a quick in and out?

Do they charge you to flash you...hehe...or is it like a warranty/recall thing?

[Yetti]

there was tons of TSBs on the allison trans for malfunctions in the controller. if its under a tsb it should be free to you.

[Yetti]

by the way I had a trans at 4400 miles and three controllers in by the time I had 22,000 miles on my`01 allison

[mschaffer66]

I guess I should feel lucky that mine has made it to nearly 90k with minimal problems.

Oh well at 107k my warranty is up and I'm going to start modding it a bit. If the Allison goes after that I'll get an ATS or something for it.

[AWK]

I can search this issue for you if you like. PM me, I will need a little more info.

AWK

[KILLER"B"468]

Yep have it flshed and then have her drive it like you. It is OBDII and it does learn driving styles. But I would have it checked out none the less.

[95geo]

Originally Posted by mschaffer66

Oh well at 107k my warranty is up and I'm going to start modding it a bit. If the Allison goes after that I'll get an ATS or something for it.

www.dieselplace.com for all of your answers

mine did some things like what you described a while ago, i think i had an egr code and a tranny code. i have an LLY engine though

i'd recommend a suncoast level 3 or 4, IMO ATS is overpriced

[kerryann]

Originally Posted by KILLER"B&quot

Yep have it flshed and then have her drive it like you. It is OBDII and it does learn driving styles. But I would have it checked out none the less.

He doesnt know how I drive it when he's not around. :tonka:

[JOE]

Hey man, i'm glad to see you bought a Dmax! Check out www.dieselplace.com for all the answers. I am "APEXrtx" on there.

ATS has some excellent products but so does suncoast. When the time come for my upgrade I'll probably go with the suncoast.

[84Scrambler]

Y'all shoulda bought a Dodge. ;)

[kerryann]

The truck is running fine. It seems that it might have changed it's shift points because our driving styles are drastically different.. or something like that. :tonka:

[JOE]

Originally Posted by 84Scrambler

Y'all shoulda bought a Dodge. ;)

lol.....rrrriiiigggghhhtttt

[mschaffer66]

Originally Posted by kerryann

The truck is running fine. It seems that it might have changed it's shift points because our driving styles are drastically different.. or something like that. :tonka:

Actually I found out that its not running right today when I almost met Jesus. That darned shifting this is kind of important when you need to get moving.

[95geo]

if you get a programmer like a predator or the like (not a box) you can read/clear codes along with having the power to got moving quickly... just some food for thought... :tonka: