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Chevy Silverado and GMC Sierra Transmission Problems

1486 messages,  Last post on May 13, 2013 at 11:26 AM

You are in the Chevrolet Silverado & GMC Sierra Forum.

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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Messages Page 143 of 150

#1412 of 1486 Re: Chevy Transmission problems [dthatcher] by galvezfj

Jan 09, 2013 (1:31 pm)

Replying to: dthatcher (Jan 09, 2013 9:19 am)
i had similar issue in 2012 silverado 1500 z71 4x4. My tranny took a dump at 4k, then it was rebuilt and failed again at 8. i had enough with it, contacted gm and the dealer pushed to get a new tranny put in. going on 13k and have not anymore issue. hopefully it stays that way. Main GM customer service i was in contact with send me a check for the amount of my monthly bill. for all my trips to the dealer. my closest dealer is 90 miles away. wish all the luck to you

#1413 of 1486 Re: Chevy Transmission problems [galvezfj] by gmcustsvc

Jan 10, 2013 (8:51 am)

Replying to: galvezfj (Jan 09, 2013 1:31 pm)
We're glad to hear that everything was resolved, galvezfj! Wishing you many happy, problem-free miles in your Silverado!
 
Sarah, GM Customer Service

#1414 of 1486 Re: Chevy Transmission problems [bigman55434] by dthatcher

Jan 10, 2013 (9:37 am)

Replying to: bigman55434 (Jan 09, 2013 10:30 am)
Thanks bigman. I figured as much. Just to let you know I requested a new tranny from GM and the dealer yesterday. I got a call later in the day advising the mystery part just showed up!!!!!!! The dealer has decided to fix the problem rather than wait from the local gm rep about replacement. They also advised that I would get payment assistance. Now I told my service tech I did not like this one bit, and the tech told me they told this to dealer management that I was not happy and still wanted a replacement. I think there has been more conversations about this than I know. Well if this breaks down again there will be no discussion a new tranny will be put in. That is if I keep this POS.

#1415 of 1486 Re: Chevy Transmission problems [galvezfj] by dthatcher

Jan 10, 2013 (9:41 am)

Replying to: galvezfj (Jan 09, 2013 1:31 pm)
Thanks for this information. I'm going to take this reply post to the dealer I want them to understand what is going to happen should my tranny breakdown again ( which it will)

#1416 of 1486 Re: 2004 chevy 6.0 2500 will not shift into overdrive. [samburg] by moorecarpentry

Jan 12, 2013 (2:12 pm)

Replying to: samburg (Dec 18, 2010 5:29 pm)
i have the same problem. same year and same mile... did you ever figure out what it was?? look forward to your response.

#1417 of 1486 agratton by agratton

Jan 17, 2013 (2:39 pm)

2007c1500 pickup shifting hard bang 1st second .scan with tech 2,unable to communicate with vehicle.vehicle either has a defective module or an electrical issue (per dealer). anyone know where to start to look for electrical issue ?

#1418 of 1486 Re: Chevy Transmission problems [bigman55434] by colin455

Feb 02, 2013 (11:15 am)

Replying to: bigman55434 (Jan 09, 2013 10:30 am)
I have a 2009 Chev 2500HD that I wish I had never bought. The transmission hesitation has nearly killed me (literally) twice. Upon pulling onto a highway and attempting to accelerate (was still rolling) the trans slips between gears and does not engage! Vehicles coming toward my door and I have to pull over until it gets it's act together and works. Of course - no code. Trans slips upon starting from stop occasionally and then engages hard enough you think it's going to snap a u-joint. Again - no code. On highway fumbles between gears and AFM on inclines and is a joke. I've shifted lever to drive and had indicator on dash not move and no transmission reaction. Put back to park and try again and works. Of course - no code. All are intermittant enough, I can't replicate for mechanic, no code to scan for. Wife, several friends, my son have all seen it do these things but all I get is "It is operating normally", and "it has to learn your habits" crap.
Has ANYONE figured a fix for these - or something that I can take to the dealer?
EXCEPT you "chuck" GM jackwad(s). Read 40+ posts of you clown(s) extolling "we are spouting half truths", and "we should sell at a loss and buy Toyota"! Not to mention, use a FIX that voids our warranty.
I am a real customer, have real problems and am getting NO help or recognition from GM. I like the truck and used it for what it was built for. I'm not moaning about the fuel economy rating lie. I just want my transmission NOT to kill me and work properly!
Can anyone but "chuckles" offer an opinion or a fix that WON'T void my warranty?

#1420 of 1486 Update on my crap GM products by jjacks

Feb 03, 2013 (11:35 am)

Hello chuck, I see you're still as delusional as ever. You must like herky jerky shuttering clanking junk. If you haven't figured it out yet, nobody else does. We know you work for GM so give it a rest. Nobody in their right mind would be so proud of a turd.
 
So me and GM made a deal. I would trade in my 2011 vibrating herky jerky clanking turd for a 2012. In the process, the GM area rep of 25 years was canned. That's a start. Now I am the proud owner of a 2012 herky jerky clanking turd. It has a bad vibration at around 60-63 mph. I haven't wasted my time going to the dealer. I did have all four corners balanced, and checked before balancing. Vibration still there. It 'could' be a tire, but after my last experience, I kind of doubt it. I'm just going to put a new set of michelins on it and see what it does. If the vibration is still there, I know it will be from the flywheel back. 2 weeks after the 2011 was traded in (not at my local dealer, who wouldn't do a damn thing), the service manager at the dealer with my 'old' 2011 called me up and asked what I thought was causing the vibrations. Ha! The service manager called me.....apparently he couldn't get anything out of GM. I told him I thought it was in the transmission and that was the reason it was traded in. I told him good luck.
 
Like I said, my 2012 is a turd just like the 2011. I thought I could deal with the shifting via software, but I have to get past the vibrating first.
 
Even if that is possible, it is HIGHLY doubtful the shifting issues can be addressed with software. ALL of the local dealers for every brand don't even do warranty work for their transmissions, they take them to a local trans shop. I went by there and they told me that GM has been coming out with software updates like every other month. Sometimes they help and sometimes they hurt. The problem is the design. First and foremost, more gears does not equal better. The 6 speed transmission is actually 7 speeds. 6 gear sets and lockup converter. The 4.03 gear ratio is too damn low for a gear that is used regularly. 4 to 2.3 don't work. Couple that with a spragless, clutch to clutch design and you get herky jerky low speed shifting on deceleration (the lurch). No amount of software will be able to detect residual fluid that is not fully drained from a clutch pack. The problem is that even though one solenoid is released and the other is engaged, the releasing clutches have a delayed release and therefore you have 2 clutch packs fighting against each other, hence the herky jerky. The old 4l60 (4 speed overdrive) transmissions aren't designed as clutch to clutch (direct) shifters, as they have sprags that allow for seamless gear engagement overlap (no herky jerky).
 
Then you throw in 'Torque Management' (TM) which is a fancy way of saying GM programmed the engines so that they take tons of timing out of the motor during shifts, in a half assed way of of softening the herky jerky and synchronizing shifts. The reason why you think you're gonna get killed when you stomp it and nothing happens, is because that retarded ass transmission has to think about what it's supposed to do, and at the same time, depending on the driving condition, engine timing can go from 45 degrees BTC to -5 degrees ATC. In other words, when you take 50 degrees of timing out of the motor and the transmission has an IQ of 70, expect bad results.
 
45 degrees of timing is exactly 10 more degrees than is ever needed, except GM came up with 'flex fuel' engines....a fancy way of saying programmed in case of using E85 ethanol. Hence the timing problems. (45 will work with E85) The motor doesn't know what fuel it is burning, so it goes places in the programming it should never go. NICE.
 
The reason the transmissions shift pretty good under acceleration is because you get some 'slippage' which masks the direct clutch to clutch engagement. More load = more slippage= smoother. Idling down the road at 40 mph....retard starts thinking gas mileage...shift from 6th to 4th, skipping 5th.... RESULT = clank, shudder. etc. Take some timing out in the process too = no pedal response.
 
Personally, I'm tired of thinking someone has rear-ended my ass every other day. GM has had this transmission out for several years now. Either it can't be fixed, they're do damn stupid to figure it out, or they just don't care. Not options in my opinion.
 
After the tires,,,,if it is smooth at 60mph, then I will try to program some 'on-purpose' slippage into the transmission. If that don't work, a 4l60, 65, 70 etc sprag type transmission will be put in it. F GM and their crap warranty. I like driveability. 6 speed trans equipped vehicles SUCK SUCK SUCK, AND ALWAYS WILL IF THEY ARE DESIGNED FOR 'CLUTCH TO CLUTCH' SHIFTING.

#1421 of 1486 Six speed transmission is a loser by alcianfarini

Feb 03, 2013 (12:25 pm)

Replying to: jjacks (Feb 03, 2013 11:35 am)
I agree, terrible transmission and GM continues to deny it! Let's start a class action law suit!!!! Maybe GM will hire an engineer from Toyota and finally get it working correctly!

Messages Page 143 of 150

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