Last post on Nov 19, 2013 at 10:09 AM
You are in the Chevrolet Silverado & GMC Sierra
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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#562 of 1521 Re: 02 silverado 3500 4x4 auto trans goes out of gear [sawdustdel]
Mar 01, 2010 (11:22 am)
Have you gotten an answer yet? I have a 2001 Silverado 2wd, with the Allison trans and last week started it up and the trans would not engage. Today it drove just fine.
#563 of 1521 2004 silverado will not stay in overdrive
Mar 01, 2010 (6:22 pm)
My transmission will shift from 1 to 2 just fine. It will rev to about 6000 rpms before going to third gear. After that it will not go into overdrive unless i let off the gas and as soon as i touch the gas it will jump into third gear and rev high rpms. Is there a bad sensor or is it the govenor?
#564 of 1521 Re: 02 silverado 3500 4x4 auto trans goes out of gear [stuckinorlando]
Mar 02, 2010 (12:01 pm)
No answer as of yet! No one I talk to is sure what could make this happen. Will keep trying.
#565 of 1521 Re: Everyone with Tranny problems
Mar 02, 2010 (12:30 pm)
Most of you are having the same type of problems. We had the same problems also and actually found someone to diagnose it. When the truck shifts but feels like it goes into neutral first, or shifts 1st to 2nd then straight into neutral (would make high RPMS) it is called fail-safe mode, or limp mode. It is a computer problem that would come from a number of things, ours came from the "back-up neutral safety switch" or "PRNDL" switch, it tells the dash in the truck, and the transmission what gear YOU want it to go into when you put it in PARK, REVERSE, NEUTRAL, DRIVE, 2ND, or LOW. If when you put it in gear and it does not highlight that gear on the dash, chances are, there's something wrong with the PRNDL switch in your truck, ours went out because of water damage, they are attached to the side of the transmission and have 2 shields to protect them, but sometimes the shields are faulty. This part is a 100% electronic part and water doesn't do it any good haha. As a result of that part going out, and trying to coherse the truck into gear, the clutches burnt out in a matter of 5 days and we had to pay a total of $6000 to have it rebuilt and have our GM dealer "flash" the computer 3 times (an hours labor charge, which is $132 up here). Hope I have helped someone with this, just remember when you're asking around, Limp mode/fail-safe mode, and PRNDL switch.
#566 of 1521 Re: 02 silverado 3500 4x4 auto trans goes out of gear [sawdustdel]
Mar 04, 2010 (11:47 am)
Most likely it's the NSBU switch. (Neutral Safety Back up).
Its an electrical switch mounted on the drivers side of your tranny. In earlier Allison trannys it was poorly shielded from the elements and prone to failure. I'd start there.
#567 of 1521 2005 GMC Sierra 4x4 T-Case slip
Mar 07, 2010 (11:52 am)
Hi im new to this forum. I have a 2005 GMC Sierra. the transfer case slips into neutral when taking off from a stop sign or when throttling in to it. the transmission was replaced about 2 years ago. i was thinking the encoder motor? what do you guys think.
#568 of 1521 i want to buy input gear, 261xhd
Mar 10, 2010 (1:04 pm)
I am looking to buy a good condition input gear for my 261xhd, why used? its simple cause Iím broke. But not having one keeps me from fixing my truck, not having my truck keeps me from making money, No money means I cant pay retail prices and the circle keeps going. If you have one thatís new or dealer or whatnot feel free to email, but my preference is used.
If you have one let me know price, your location and if you accept paypal or how you would like paid. I live in Maryland(20832) my email is shawnmiliyahoo.com
#569 of 1521 Re: 2500hd diesel trans line problem [yadayada3]
Mar 25, 2010 (12:58 pm)
chevy did redesign those hoses, and they still leak. there is a really great fix available at http://www.redsautorehab.com
#570 of 1521 Tranny trouble 2001
Mar 26, 2010 (8:14 am)
My problem is with my 2001 Silverado. I've had it for about 6 months and recentley it has been hard to shift (auto) from 1st to 2nd. Not all the time just somtimes. Also while driving my power seat starts moving, until I hit the control. And lastly sometimes i get in the truck and I notice the time on my dashboard has changed, but not the presets. Otherwise it has been a great truck. It was previously used as a 5th wheel. Any thoughts would be appreciated
#571 of 1521 94 gmc sierra transmission problem
Mar 28, 2010 (8:56 am)
I parked my truck for 2 weeks and come back home. When i started it up and put the trans in overdrive it don't want to shift right. It takes it awhile to shift from first to second and takes awhile to pickup speed. When u let off the gas it shifts fine, but if u get on it, with the pedal mashed down it wont shift right. ANY HELP WOULD BE APPRECIATED.