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Chevy Silverado and GMC Sierra Transmission Problems

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

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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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#315 of 506
'99 Silverado 1500 Transmission by wtharp2
Jun 26, 2008 (1:22 am)
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I have owned my Silverado for less than 90 days, and the transmission is now giving me problems. Specifically, it will no longer enter 3rd/4th gears. 1st, 2nd and Reverse work just fine. There are no abnormal noises coming from the transmission and the truck isn't acting differently than normal (other than the loss of 3rd & 4th). The transmission fluid is both dirty and low, but it is not burned.
The only warning of this issue I received was the transmission hunting between 3rd and 4th and the idiot lights coming on for hot transmission (first the warning, then the critical). When I saw the critical, I shifted to neutral and coasted until it went out (I was on a freeway with no lane in which to stop).
Any idea what is wrong? Obviously, I'd like to not replace the transmission.
 
Thanks for any help.
#316 of 506
Re: '99 Silverado 1500 Transmission [wtharp2] by obyone
Jun 26, 2008 (2:52 am)
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Replying to: wtharp2 (Jun 26, 2008 1:22 am)

Over heated with low and dirty fluid and the truck is 9 years old. I'd say you're in for at least an overhaul.
#317 of 506
Re: 03 SILVERADO 1500 Transmission Problem? [catfish2] by 1500_v8
Jul 02, 2008 (8:32 pm)
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Replying to: catfish2 (Mar 20, 2007 4:30 pm)

Sounds like you have the same issues as mee. Did you ever get an answer?
 
Thanks,
#318 of 506
Re: '99 Silverado 1500 Transmission [obyone] by wtharp2
Jul 04, 2008 (6:58 am)
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Replying to: obyone (Jun 26, 2008 2:52 am)

Actually it is a rebuilt that is less than 3 years old -- the engine was new -- from -gm -- as of May 2007...
 
I took it to a local AAMCO, and they said there was fine metal in the pan. They wanted an additional $479 to dismount it, crack the case, and see what was wrong. Although I thought that was fairly reasonable, 1) I don't have a spare $479 at the moment and 2) I am ultimately going to replace it with a beefed up one, so I'm not going to fool with it for now.
 
Thanks.
 
obyone said:
"Over heated with low and dirty fluid and the truck is 9 years old. I'd say you're in for at least an overhaul."
#319 of 506
Transmission problems in my 2001 sierra by hcamaro
Jul 06, 2008 (7:08 am)
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hello, I have a 5.3 v8 2001 sierra and the other day it was runing fine (no sliping or warning lights) and i went to pull alway from a stop sign and something happen. It felt like it got put into nuetral. Now i don't have D,3,2,1 but i do have reverse. I changed the oil to look at it. The old was realy dark and there was some metel at the bottom of the container but nothing abnomal. The truck has 97000 miles on it. if any one can help me out please feel free to write back.
#320 of 506
Re: Transmission problems in my 2001 sierra [hcamaro] by fordfan_17
Jul 07, 2008 (10:27 am)
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Replying to: hcamaro (Jul 06, 2008 7:08 am)

if the trans will go into reverse but absolutely no forward gears the input sprag (forward) is probably blown or the forward clutches are smoked. have it checked by a trans shop but your description is a blown sprag
#321 of 506
thanks by hcamaro
Jul 08, 2008 (4:34 am)
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#322 of 506
by hcamaro
Jul 08, 2008 (4:37 am)
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what would cause somthing like this happen.? It did sit up for about 1 1/2 year.
#323 of 506
Re: [hcamaro] by fordfan_17
Jul 08, 2008 (3:53 pm)
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Replying to: hcamaro (Jul 08, 2008 4:37 am)

well during the stored time trans fluid can drain down and leave parts open to air since the trans has a atmospheric vent to keep pressure from building if parts started to rust in a year + time and then load put back on them the metal has deteriated and possibly rusted away enuff to let the input sprag fail...
#324 of 506
1500 Silverado HD Auto trans by 1500_v8
Jul 09, 2008 (9:04 pm)
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My truck was rough shifting from 1st and 2nd gear(alomost jumping). Also it would idle too fast. i finally took is to the dealer and they said is was the Throddle positioning sensor. The part by itself costs $140. For a awhile there I was getting whiplash. They fixed it and now the truck shift smoother than ever. I thought the trans was going. Whew! I hope this helps.

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