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Chevy Silverado and GMC Sierra Transmission Problems

471 messages,  Last post on Jun 29, 2009 at 3:51 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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#462 of 471
Z71 tranny problems by ruftoyzdawtr
Jun 19, 2009 (2:08 pm)
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Well it depends on the people who have owned the truck, pretty much with any vehicle, if you care for it, it will run well for a very long time. Routine maintenance, etc. We had the same problem, i actually posted about our truck on here too. Ours had an allison transmission in it, supposedly one of the toughest, if not THE toughest tranny there is, and it went out. Our truck is still not running because the guy we had rebuild it, didn't do it right and the gears are grinding putting metal through the valve body and into the fluid, clogging the valves. It currently is stuck in reverse mode and only has 3rd clutch and reverse clutch. I guess it just depends on the job, IF yours was rebuilt then the guy didn't do it right. It also could very well be an over-heating problem or an electrical problem. You can take it to a shop and most places will only charge an hours labor to see whats wrong with the truck. If it comes down to the tranny then you know. Better to be safe than put a ton more money into it and be sorry when you find out that wasn't the problem. Even if you have a buddy who has a scan tool that you can hook into it, If the truck has the ports for one, you can do it free that way, the computer will usually tell you if there are any electrical issues or for example and misfire, which would be a spark plug. vehicles that haven't been well cared for are a pain. Hope some of this helps! =)
#463 of 471
Re: In reply to the 1996 Z71 Tranny problems [ruftoyzdawtr] by jcc1958
Jun 19, 2009 (3:35 pm)
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Replying to: ruftoyzdawtr (Jun 18, 2009 11:16 pm)

I started the truck today and it ran for about 10 minutes before it went out of gear and it made that hissing (air) noise when it did.Started it back up and it moved about 2 ft..you can tell when it's going to go out because of that hissing noise.
an ideas?
#464 of 471
Re: In reply to the 1996 Z71 Tranny problems [ruftoyzdawtr] by jcc1958
Jun 19, 2009 (3:36 pm)
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Replying to: ruftoyzdawtr (Jun 18, 2009 11:16 pm)

I started the truck today and it ran for about 10 minutes before it went out of gear and it made that hissing (air) noise when it did.Started it back up and it moved about 2 ft..you can tell when it's going to go out because of that hissing noise.
an ideas? oh I forgot to put the # I got off of the tranny.. 15671928 no idea what it means.
#465 of 471
2000 Silverado 1500 4x4 what's wrong? by krazyk22
Jun 23, 2009 (3:30 pm)
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I own a 2000 Silverado 1500 4x4 with 125K miles. Here recently when I accelerate, the truck often revs up into the 3000 rpms, and and sounds like it's going, but the truck doesn't move. I have been assuming it must be the transmission, but could this be something else?
#466 of 471
Transmission by jcc1958
Jun 23, 2009 (4:59 pm)
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Well I am having the transmission rebuilt.My mechanic said that tranny had NOT been rebuilt and gave me some tips for checking for that.You can bet next time I will.He told me my motor was good so I said just fix it then.He said the motor should last for another 100 to 300 thousand miles.So I am going to take the chance and see.Will let you all know what happens.I should have it back in about a week.The guy I bought it from really ripped me a big one.Oh the tips he told me were to look at the fluid on the tranny fluid..I did that but it was before I drove it.He said the guy probably just changed the fluid is all he did.He said check it before you drive it and after and smell of it to.If it smells like its burnt walk away unless you want to put a tranny in it..I hope that guy knows what comes around goes around..He also said if it shirfted smooth that you couldnt feel it that was bad to..He said you should be able to tell..to feel when it shifts ..maybe this will help someone else so they dont get ripped one like I did.
#467 of 471
Re: 2004 GMC Sierra Ext SLE 5.3l [04sierraz71] by saintal
Jun 27, 2009 (7:37 pm)
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Replying to: 04sierraz71 (May 28, 2009 11:02 pm)

HI, did you ever find out what caused the problem.
 
I had a problem today pulled out on hwy. lost 3 4 forth had to drive home in 2nd gear.
 
thanks, saintal
#468 of 471
Re: 2004 GMC Sierra Ext SLE 5.3l [saintal] by jcc1958
Jun 27, 2009 (9:49 pm)
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Replying to: saintal (Jun 27, 2009 7:37 pm)

Yes it's my tranny..the guy told me it had been rebulit but it hadn't..but it's getting rebuilt right now.Hope to have it back by the end of next week.The guy thats rebuilding it told me he would be out of a job if it wasn't for gmc and chevy transmissions..they still put that same one in trucks now..Hope that's not what yours is.let me know good luck
#469 of 471
Transfercase shift motot issues. by lpopowich
Jun 29, 2009 (5:39 am)
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I have a 2003 chevy 1500 4X4 , i have been having issues with my transfercase shift motot, Mechanic said it was garbage, I have bought a new one, installed it and tried it agiain, everthing seemed to work on electronic shift module display in truck , but when I did go to shift into 4X4 I heard it all working from inside the truck ,( the electronic motor working ) , Then it turned all lights on display off, and the instriment display indicated for me to service 4 wheel drive. and none of the display lights work again.
I am back to square one. would this be I have to get me truck plugged back into the mechanic computer and re set ????
 
any help would be appreciated.
 
Lorne
#470 of 471
Re: 2004 GMC Sierra Ext SLE 5.3l [saintal] by txredneck
Jun 29, 2009 (6:01 am)
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Replying to: saintal (Jun 27, 2009 7:37 pm)

SORRY, NO I NEVER FOUND OUT WHAT IS WRONG. IT SOMETIMES SHIFTS GREAT, AND OTHER TIMES IT WINDS UP WAY FARTHER THAN IT SHOULD BEFORE IT WILL SHIFT. I KNOW LITTLE TO NOTHING ABOUT TRANSMISSIONS SO I AM AFRAID TO TEAR INTO IT THAT I WILL DO MORE DAMAGE THAN GOOD.
#471 of 471
95 Chevy Z71 won't shift into 3rd by gvick
Jun 29, 2009 (3:51 pm)
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I have a 1995 Chevy Z71, it shifts from 1st to second just fine but will not shift into 3rd, the fluid does not smell burnt and still redish in color, any suggestions??

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