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Chevy Silverado and GMC Sierra Transmission Problems

506 messages,  Last post on Dec 01, 2009 at 1:57 PM

You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck


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#403 of 506
Re: chevy '02 2500 hd hot tranny ? [jneal] by Lady3bglover
Feb 06, 2009 (1:29 pm)
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Replying to: jneal (Sep 03, 2006 10:09 pm)

We all know Chevy/Gm isn't known for their transmission production, unless it's on a performance vehicle. After #3 on my '02 Silverado (2 were replaced by GM), I've upgraded to a performance trans with a Vig 3400 stall and Servos.
 
I agree... get the cooler. B&M has a nice set up and it's relatively easy to install.
#404 of 506
Re: Start in 3rd gear [byancey] by byancey
Feb 08, 2009 (5:36 am)
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Replying to: byancey (Jan 13, 2009 5:24 pm)

Found out it's the ignition switch (not the key tumbler) that was bad. Seems it supplies 12v to the trans and when it would lose power, it went to "limp-home" mode. $30 switch, $20 labor, and problem fixed. I looked at the old switch and it had carbon on the contacts. Mechanic also said it could cause the electric fuel pump to quit.....too much computer stuff nowdays....
 
BY
#405 of 506
2008 sierra 1500 V-max funky throttle/trans by combine_dude
Feb 08, 2009 (6:05 pm)
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2008 sierra 4X4 crew cab 6.0 V-max trailering pkg. About 1500 miles now. I drive like an old lady most of the time (I have to use a hand brake control-so kinda hard to take an agressive drive as bad as I may want to) but I do get on it now and then on the straights. As compared to my 2002 Chev 2500HD 6.0 this new one acts like it has a rubber band in the throttle linkage (I know it doesn't have a linkage but this description paints the best picture for you). The response you get doesn't seem porporsional to the amount of pedal movement you apply.You can move out easy, then press a little to pick it up a bit, and get not much response, so then a little more, and sometimes a little more before you get much, then it comes alive and keeps pulling hard way beyond where you would expect it to level out (almost like a turbo lag). Then you gotta get way out of it to level out at a reasonable speed. This seems strange. Is it just the way drive by wire is? Not a big issue just wondering. A bigger concern is when I slow down (pretty slow) to make a turn, like into my driveway (100 yds long) and then press on the gas slightly to take me up the driveway there is a slack point as if you slipped it into neutral for a split second before it starts to go again. I believe it is more prevalent when the pick-up is cold. I'm a newby here. I read all 400 or so tranny entries-pretty interesting. Lots of good heads out there! My AFM 6.0 has me a little scared after reading some of the comments in that section. I would invite any of you who really KNOW (not just strong opinions) GM engines to put my mind at ease. I was "Ford to the core" from age 12 but (after openning my mind enough to consider all brands) starting in 2002 have bought 5 GMCs and 2 Chevys and liked them all. Hey, I'm also pretty computer/internet challenged. Where'd that car picture next to my message come from? Please take it easy on this old farmer in your response!
#406 of 506
2003 Silverado Transmission Problem by madman4
Feb 11, 2009 (8:47 pm)
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I own an 03 Chev Silverado 2500HD Duramax w/ an Allison transmission. My problem started not long ago as a hard shift between 2nd and 3rd. I decided to change the fluid, filter, and give it a trany flush. Since then the truck has gone into limp mode twice at highway speeds, not good. It does this when everything is good and warm, when the trany is cold everything works properly. I would really like to get an idea of possible solutions. If they don't involve doing a rebuild on the trany I would like to do the work my self.
#407 of 506
What can I do ? by levans498
Feb 05, 2009 (5:57 am)
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#408 of 506
What can I do ? by levans498
Feb 05, 2009 (5:57 am)
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I have a 96 step side silver. with the 4L60E tranny. Well I want to get away from that tranny cause it is such an odd ball . I know it is the electronic tranny . But is there ANY WAY to go with a different tranny ? all I do is HWY driving . no pulling and such . O YEAH the tranny in the truck now is shot .
#409 of 506
Allison shifting and indication problem by mtceintl
Feb 20, 2009 (1:28 pm)
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#410 of 506
Allison shifting and indication problem by mtceintl
Feb 20, 2009 (1:43 pm)
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After a recent snow storm, rare for this area, I ran into a problem with my 2001 2500hd with the Allison transmission. It locked up in 2nd gear and I lost indication of selected gear on the panel. After it was left in the garage overnight it returned to normal but the lockup happened again a couple of times. DTC code of 0708/0709
"range selector problems. Loss of indication became worse. After digging around on many forums and into the GM service bulletins I found something really interesting which ultimately solved my problem. There is evidently, a bit of a design problem in that when you turn left any water or snow gets sprayed up directly on to the park/neutral/ backup switch, which is also the range selector switch. If the selector shaft o ring is worn or cut, water penetrates the switch and the problem begins. I changed the switch and everything back to normal. Out of curiosity I drilled out the rivets and opened up the switch. Sure enough the o ring was damaged and there was water in the switch. The switch had water repellent grease in it but the water had caused high resistance across the terminals.The things they don't talk about !!! Hope this helps someone else.
#411 of 506
Trans. flush,or drain? by grampy1
Feb 23, 2009 (4:17 pm)
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2004 K1500 sierra, 4 speed auto,4.8 lit.
 
 Whats the best/accepted way to service the tranny? i hear different opinions. My owners manual just says "service the transmission". I don't know what that means.
#412 of 506
tranny on 2001 chevrolet silverado by speedboy1
Feb 23, 2009 (5:35 pm)
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i have a 2001 chevrolet silverado RWD its got 126000 kms on it now is there a 5 speed auto available for it because mine feels like it has 5 gears

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