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Chevy Silverado and GMC Sierra Transmission Problems

503 messages,  Last post on Nov 10, 2009 at 5:28 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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#48 of 503
2005 Silverado 2500 transmission noise by ariles7
Mar 10, 2007 (6:03 pm)
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I have just bought a 2005 Silverado 2500. I love the truck and it gets great gas milage and runs great, but I hear a clanking noise when I shift gears. Like something is loose. (5 speed trans.) I have taken it to my local dealer since the dealer I bought it from is 2 hours away. I have emailed the GM company and they said try another dealer and if I am not satisfied with their diagnoses, let GM know and they will make it right. Most people I talk to say it is normal. I just wonder if it normal or if it is a real
 problem that GM is trying to avoid. Should we join forces and contact the consumer protection agency or something?
#49 of 503
Re: 2005 Silverado 2500 transmission noise [ariles7] by geo9
Mar 10, 2007 (6:33 pm)
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Replying to: ariles7 (Mar 10, 2007 6:03 pm)

HMMMMMMM.....You have 1 RARE truck....A 2500 5 speed ?
Miles? 2 or 4wd? auto or stick??????//
 
Take it to another dealer...............
#50 of 503
Re: 07 Silverado rough shifting [azmike07] by chrmdome
Mar 11, 2007 (9:17 am)
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Replying to: azmike07 (Mar 09, 2007 1:16 am)

Greetings:
 
I picked up my 2007 Silverado K1500, 4x4 Crew on Friday, March 9th and noticed the same problem. Rough shift from 1st to 2nd. It had 5 miles on it when delivered. Now at 36 miles the shift is smooth. I attributed the rough shifting to incomplete trans fluid distribution. I have driven the truck at low speeds for last two days and am not noticing any rough shifting now.
 
Chromedome, San Diego
#51 of 503
Re: 07 Silverado rough shifting [chrmdome] by dustyk
Mar 15, 2007 (4:42 pm)
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Replying to: chrmdome (Mar 11, 2007 9:17 am)

The 4L70E and 4L80Es have new shift control assemblies and are now semi-adaptive. Your transmission was probably going through it's learn cycle. I think you'll find that if you ever disconnect the battery for a minute or two, it will do the same thing.
 
Dusty
#52 of 503
Re: Auto Transmission clunk [jsross44] by pins
Mar 17, 2007 (4:37 pm)
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Replying to: jsross44 (Jan 29, 2007 7:09 pm)

I have a 2004 Sierra, same thing with my shifting. I have had it in twice and same as you, I have been told this is normal. Love my truck!
#53 of 503
Loss of power and transmission noise by october2525
Mar 18, 2007 (7:00 am)
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My 2004 GMC Sierra 2500HD 4 x 4 looses power when my transmission temp gets between 180-200 degrees. It only gets hot on the hot summer days or when I tow my boat. There is also an unusual noise(higher RPM?) in the transmission when I take off after sitting a controlled intersection. I get my vehicle serviced on a regular basis. I have yet to take it into a dealer..any ideas?
#54 of 503
06 auto tranny failure by oomag12
Mar 18, 2007 (9:18 am)
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42,700.. easy on her, no hauling, no towing..all highway miles....just went, no warning. I did have a little ride on slush ice the day before she went, down shifted and upshifted from D to 3 maybe a dozen times. next day, slipping and serious grinding growl. perplexing indeed. My 97 Jimmy Z-71 v-8 4wd has been bullitt proof..I am knocking on wood. Any insight. 06 did start using a new trans type correct?? I have the v-6 vortec WT 4 sp auto 2wd. Uses the new VI fluid type.
#55 of 503
Re: Auto Transmission clunk [jsross44] by likearock
Mar 18, 2007 (3:46 pm)
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Replying to: jsross44 (Jan 29, 2007 7:09 pm)

Start saving your money for a new transmission, GM Will be of no help, Afterall this is normal according to their service notice.
 I sold mine after getting tired of beating a dead horse trying to talk to G.M.
I took a gamble and bought a 2500 HD with a Duramax diesel and the Alison Transmission, I am very happy with this truck and the transmission is great. but will never buy another G.M 1/2 TON truck again.
 
Good luck
#56 of 503
Re: Auto Transmission clunk [likearock] by paisan
Mar 18, 2007 (6:30 pm)
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Replying to: likearock (Mar 18, 2007 3:46 pm)

This is good to hear Likearock. I'm always worried about trans issues on any automatic trans.
 
-mike
#57 of 503
new style 07 trany w/vortex max by bumperdude
Mar 18, 2007 (7:23 pm)
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i bought a new style 07 1500 w/the 6.0 vortex max package. the first gear always sounded like it had a whine but at 7,500 miles it has gone. bought it dec 05 2006. it came apart and gm said they will rebuild it. i wanted a new transmission but the warranty says rebuild. i will be taking them up on that new 100,000mile factory warranty.

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