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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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#415 of 506
Re: Allison shifting problem. [gnusarev] by msfexp
Mar 10, 2009 (5:10 am)
Reply

Replying to: gnusarev (Aug 12, 2008 12:23 pm)

My '02 Sierra 2500HD has the same shifting problem. When I attempt to "kick it in the butt" at speed hoping it would drop into a passing gear, the truck acts like it wants to, but then just "dogs down" unless I back off the accelerator. Had this happen before and the deal told me it was the oil filter...yes, oil filter. The previous oil change had a Wix filter installed. Evidently that has an affect on back pressure, typically 4-6 lbs., but was causing 8 -10 lbs. Filter was replaced by Genuine GM parts and the truck ran like a top.
Again, about a year later, same thing. Wix filter was installed again, and again same problem. However, when I replaced the Wix with a GM/Delco filter, the problem didn't get solved.
Does anyone out the have any other suggestions?
#416 of 506
2000 Silverado 2500 hard shifting by killerbee2
Mar 10, 2009 (2:46 pm)
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I recently noticed my transmission shifting hard at times. It normally shifts really smooth,but occasioinally hard. I noticed it more often now that the weather is warmer. the tempeature guage for the transmission runs around 150 degrees. I don't know if the fluid and filter has ever been changed. I bought the truck used and was wondering if it was okay to change them with the mileage at159000.
#417 of 506
Re: Removing transmission pan on 04 Sub [obyone] by 2001silverado
Mar 15, 2009 (7:44 am)
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Replying to: obyone (Dec 20, 2008 10:15 pm)

I'm having the same problem on my 01 Silverado with a 5.3. I didn't see that the originator ever responded. Please help?
#418 of 506
Re: Removing transmission pan on 04 Sub [2001silverado] by bumperdude
Mar 15, 2009 (8:35 am)
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Replying to: 2001silverado (Mar 15, 2009 7:44 am)

i have 5 silverados in my fleet (2000-2008). as soon as they show any sign of something going on w/the tranny i have them serviced by a shop with a good history. no crooks. they can look at what comes out of the tranny and tell if i'm in for a bad day or just a flush. good luck.
#419 of 506
Transmission help 2002 Silverado 2500-HD by whorl16
Mar 18, 2009 (8:59 pm)
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#420 of 506
Transmission help 2002 Silverado 2500-HD by whorl16
Mar 15, 2009 (4:42 pm)
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I have a 2002 Silverado 2500-HD 6.0 liter gas with 104,000 miles on it. The transmission shifts very smooth while accelerating, but during deceleration or braking, the vehicle starts shuttering and acts as if doesn’t want to down shift. Has anyone experienced this problem or have any ideas. Thanks.
#421 of 506
power surge at idle and check engine light by onyx2
Mar 18, 2009 (8:59 pm)
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i have an 04 chevy 2500hd 6.6 that surges at idle. if i let the truck idle it jumps from 1000 to about 1500 every 4 to 5 secs. it only happens sometimes so it's kind of hard for me to pin point the cause of it. plus my engine light likes to come on an won't let me go over 2500 rpms. the code says something like (pressure regulator failure at acceleration). i know someone has to have same problem out there. if anyone can help with this please help.
#422 of 506
Shifting problems. by annabelle1140
Mar 28, 2009 (12:29 pm)
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Had a new motor and tranny replaced 14 months ago. When I take off to drive the truck, I have to push firmly on the accelerator to get it going. Once the RPMs get high enough it shifts into 3rd gear and does fine from there. It seems to be skipping 1st and 2nd gear. Transmission shop did diagnostics, said it threw a code 66. He then bypassed the computer and said the transmisssion works fine. He sent us to electric shop, for electrical problem. They checked the wiring from the ECM to the transmission and said its fine, so it must be the main computer. We have replaced the main computer and still Not working correctly. Any clues, these diagnostic fees have emptied our pocket. Please help">
#423 of 506
Re: Shifting problems. [annabelle1140] by byancey
Mar 29, 2009 (9:12 am)
Reply

Replying to: annabelle1140 (Mar 28, 2009 12:29 pm)

My 2004 GMC started in 3rd gear off and on...Mechanic did tests, changed fluid, filter, etc....found out it was the ignition switch (not the key tumbler part) that was bad. Seems new electronic trans need 12v to work right. $30 part, $20 labor...problem solved.
 
Good luck
#424 of 506
4l60e has no reverse moves in neutral by ineedhelp690
Apr 05, 2009 (6:09 am)
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hi,i need some help please.I just rebuilt a 4l60e with a rebuild video.I used a master overhaul kit.put new vette servo and new 2-3 shift solenoids.i didnt replace the wiring harness.i had rebuilt it cause i lost 3-4 gear.i put the transmission in and it doesnt have reverse,jumps when you put it in park.and drives forward in neutral.but as far as 1-2-3-od they work great shifts are better then ever.if anyone can help please do. thank you

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