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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

#491 of 506 Clunk upon acceleration by joopdog Sep 25, 2009 (7:44 pm)
I have the following: 1996 Chevy Pickup truck V6 4.3L engine   When I accelerate from 1st to 2nd gear (10-15 mph) I get this noticeable clunk noise. It all started on Monday (09-21-2009), it just started out of the blue. No gradual noises, no warnings.   I believe it's coming from the transmission. And now, it's beginning to leak. I see wet spots under my truck that I've never seen before.   What is this? Do I need a new transmission? I hope not, I don't have the expense for this.   Any help would be appreicated.
#492 of 506 Re: 4l80e in 2006 GMC Sierra 2500HD 4x4 [redbuggyboy] by redbuggyboy Sep 30, 2009 (5:26 am)
Replying to: redbuggyboy (Sep 15, 2009 8:46 pm) Ok I was gonna be nice by not mentioning the dealer we took the truck in to have the tranny problem repaired but now I am pissed. First off after we got it back I did the inspection at home and they left the vent lines all loose and didn't put the wiring back into the retainers properly. The morons left the shift cable sitting on top the transfer case drive shaft as well. This is Don Davis out of Lake Jackson, Texas....incompetent and arrogant worthless dealer and technicians. I am posting this because just yesterday the tranny blew the front seal and bled everywhere and unfortunately we have to take it back to the pieces of shit that installed the rem tranny. I spent four hours cleaning up tranny fluid from the underside and all along the passenger side of the truck! So much for having a oil free truck!!!!! I will post on what takes place. Thanks Don!!!!!!!!!!!!!!!
#493 of 506 truck wont run when i shift into drive or reverse by mudd_lover Oct 06, 2009 (7:12 am)
i have an 88 silverado 1500 with the 700 r 4 tranny. i pulled my buddy out of the mud and the next day it didnt want to shift itself into 1st. so i would be leaving stoplights in 2nd gear. it would only go into first if i shifted it manualy on the collum. then when i would come to a stop the truck would die. it only wants to run in park or neutral. i can can get it to move if i rev it up to about 1700 rpm and drop it into gear and once im moving its fine. i was told it was the torqe converter. does anyone else have any ideas or have had a similiar problem? it is a rebuilt tranny with only 3000 miles on it.   thanks          Nick
#494 of 506 Transmission problems by chevygirl86 Oct 06, 2009 (9:17 am)
My automatic transmission is not shifting grears when it's on drive but if i shift from frist to second it will do it and then second to third it won't do anything it acts like its on neutral. Does anybody know whats wrong with it?can anybody help me!?!?! Replies to this message: ruftoyzdawtr (Oct 06, 2009 2:10 pm)
#495 of 506 To Everyone having tranny problems.... by ruftoyzdawtr Oct 06, 2009 (2:08 pm)
I posted back in May about my duramax, now just because yours may no be a duramax or an allison, DOESN'T mean you shouldnt read. My truck is STILL being worked on, and its OCTOBER! We found that there are many electronic components on the OUTSIDE of the tranny that can really screw things up if they get wet. On ours it was the "range switch" AKA "Park-Neutral Position Switch" AKA "Neutral-Back-up safety switch". Its a little electronic box on the outside of the tranny that relays info from your PRNDL display in the cab, to the transmission....If it gets wet, it will fry and your tranny won't work properly. It getting wet is caused by DIRECT water spray from a left turn onto this part (If the front and rear shields are NOT properly installed. We also found that, some of the wires going to different solenoids are shorted, that is what is being fixed now. Usually if you take your vehicle to a shop, they will scan it for codes....for FREE, just call around to find someone! its worth the drive and the time!
#496 of 506 Re: Transmission problems [chevygirl86] by ruftoyzdawtr Oct 06, 2009 (2:10 pm)
Replying to: chevygirl86 (Oct 06, 2009 9:17 am) Sounds like your truck may be in limp mode, you need to take it to a SPECIALTY transmission shop and have them run a diagnostic. Do your research on what they tell you and then go from there. Make sure you find on that will be honest with you, not one that will tell you it needs to be totally over-hauled if it only needs one part replaced.
#497 of 506 Re: 04 GMC 2500HD Tranny question. [svga] by sierrasommets Oct 09, 2009 (10:19 am)
Replying to: svga (Sep 19, 2009 10:15 am) I've a 2003 Chevy Silverado and mine does that almost every time I accelerate from a stop. Not sure what it is....
#498 of 506 Re: 04 GMC 2500HD Tranny question. [svga] by ruftoyzdawtr Oct 09, 2009 (12:15 pm)
Replying to: svga (Sep 19, 2009 10:15 am) Diesel? If it is, it has an allison. Mine is an 01 and has the allison 1000 in it, the newest ones have 3000's and 4000's in them. I suggest taking it in for a diagnostic. It could be any number of things.
#499 of 506 Re: 2000 Silverado "Pops" out of 1st [zante64] by truckman44 Oct 11, 2009 (10:22 pm)
Replying to: zante64 (Aug 03, 2007 2:49 pm) I recently joined this group after reading all the "real world" information here about our great American icon giant, GM.   Being a GM guy most of my life, I bought a 1995 GMC Sierra W/T 4.3 V6 w/5 speed tranny in March '95. Tag says truck was built in Canada. With 6 miles on the odometer, I left the dealership when at the moment I first let off the clutch, the floor shifter popped out of first gear and slammed into the palm of my hand, nearly breaking my wrist. I simply thought this was my error of not having the shifter properly engaged, so I went along my happy way. About a month later while at a stop light, the same thing happened and again a month after that. I brought the truck back to the dealer to investigate the problem. They kept the truck 2 days before calling me to say they could not duplicate the symptom or find anything wrong. The problem continued once or twice monthly until it began occurring more often. The truck went back to the dealer 5 times thereafter with this problem. Each time they said they could not find or acknowledge any tranny problem.   The truck's first year saw over 65k miles using 1st gear only at times when necessary (I had gotten used to it). By the third year, the problem had become so severe, it occurred almost every time while starting out from first, until at 278k miles, the tranny finally locked up one day requiring the truck to be towed to a transmission shop.   The truck has always been serviced by the dealership during warranty. All fluids were replaced with the proper GM fluids, but they never would acknowledge this problem. I finally stopped using the dealership for service. Warranty had long run its course.   At my expense, I had the tranny replaced with a used low mileage one as the shop said the original tranny had "melted" on the inside and although they had seen this condition before, it could not be rebuilt. One week and $2k later, the truck was serving me faithfully on the road again, only this time, for the first time in it's life, I was able to use 1st gear normally with no problems at all. Wow!   At 427k miles, the second tranny became extremely difficult to shift into first and sometimes second gear. Another visit to the shop for a $1.6k shifter kit overhaul modification of some kind, it was almost like new again. They told me to "baby" it and it might get me by for two more years.   Today, at 1/2 million miles on the odometer, this second $2k tranny with it's $1.6k shifter mod is now beginning to "melt down" on the inside (as they described it) like the first one did, although, it has never popped out of 1st gear like the original tranny did. Oh well, I can't complain! Will I go for a third tranny or not? After all, this truck has served me VERY well with an engine having never seen a wrench, burns/leaks no oil from oil change to oil change, performs reliably as a GM built work truck should and still gets me 23 MPG to this day! This leaves me to ponder one valid question:   Why can't GM build transmissions to perform like that V6, 4.3 engine???
#500 of 506 Transmisson problems by katyc6 Oct 24, 2009 (10:49 am)
I have a 1993 Silverado. It shifts hard from 1st to 2nd then it won't shift into 3rd it is like it is in neutral. We have replaced the 2 soilinoids in it but it still isn't working right. We were told that it could be the speed sensor but haven't tried it yet. Does anyone know if it would be the speed sensor or what else it could be. Replies to this message: truckman44 (Oct 25, 2009 12:44 am) ddowne (Nov 29, 2009 8:38 pm)

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