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Chevy Silverado and GMC Sierra Transmission Problems

1487 messages,  Last post on May 21, 2013 at 7:22 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 59 of 149

#581 of 1487 Re: Trans Cooler Install [obyone] by chomp1974

Apr 04, 2010 (7:38 pm)

Replying to: obyone (Mar 31, 2010 6:00 pm)
I am looking for a good quality trans cooler, trans shop said an LPD style that is good for the winter--any suggestions???? There are so many to pic from on EBay. Would I be best to get an OEM trans cooler from the dealer that includes the lines etc. What part number would I get??? The OEM style I saw on EBay looks like you just hook up directly to the trans and then to the cooler--does this mean you are to plug of the ports at the RAD and just use the Trans Cooler only as a means of cooling?? I have a 2001 Silverado 1500 4x4 4.8L--does not have the towing package--it's a base model.
This is the info I saw on EBay:
 
2000-2007 Chevy Silverado 1500 Transmission Cooler
Genuine GM Part Number: 12497071
   
Recommended for trailer towing upgrade w/ 4.3L (LU3, L35), 4.8L (LRV), 5.3L (L59) and 5.7L (LM7) engines. Helps prevent transmission overheating.

#582 of 1487 Re: Trans Cooler Install [chomp1974] by obyone

Apr 04, 2010 (9:19 pm)

Replying to: chomp1974 (Apr 04, 2010 7:38 pm)
I ran that part no. at gmpartsdirect.com. The small radiator is installed in front of the factory radiator. It plugs into the return line from the radiator. It's a simple install once you see the directions that come with that unit. BTW, I'd order it using that part no. as it is OEM and should plug and play with no problems.

#583 of 1487 Re: Trans Cooler Install [obyone] by chomp1974

Apr 05, 2010 (4:20 am)

Replying to: obyone (Apr 04, 2010 9:19 pm)
If you notice when you look at the lines that come with it, they look pretty long as if they are meant to go to the Trans itself???

#584 of 1487 Re: Trans Cooler Install [chomp1974] by obyone

Apr 05, 2010 (9:51 am)

Replying to: chomp1974 (Apr 05, 2010 4:20 am)
The lines aren't that long. If it's to scale with the trans cooler the lines won't be more than a couple of feet as they connect near the radiator to the "out" line from the radiator that returns the fluid back to the trans. The hardest part of the install will be to strap the cooler to the front side of the truck in front of the radiator. Shouldn't take more than 45 minutes to install.

#585 of 1487 Re: Trans Cooler Install [obyone] by chomp1974

Apr 05, 2010 (4:27 pm)

Replying to: obyone (Apr 05, 2010 9:51 am)
Am I correct in assuming that the top line on the Rad is the return line to the Transmission??? You sure are alot of help----THANKS

#586 of 1487 Re: Trans Cooler Install [chomp1974] by obyone

Apr 05, 2010 (6:29 pm)

Replying to: chomp1974 (Apr 05, 2010 4:27 pm)
Not sure. I'll have to look it up in the shop manual and post. Actually it's been awhile and can't remember.

#587 of 1487 transmission by gmgwmc3

Apr 11, 2010 (2:13 pm)

I have a 93 Chevy Silverado . My transmission works okay in drive, overdrive and reverse. It will not move in the gears one and two. The transmission shifts good up thru drive, Could anyone help me with this problem. Sure would appreciate it. Thank you GMGWMC3

#588 of 1487 Re: transmission [gmgwmc3] by stuckinorlando

Apr 11, 2010 (2:36 pm)

Replying to: gmgwmc3 (Apr 11, 2010 2:13 pm)
I had a similar problem. I ended up replacing the transmission control module. These were the other things I had going on:
One day it was very sluggish in drive and when I got to destination there was no reverse. Started up 3 hours later and no problem
Two months later started it up no gears would engage. Went away for a long weekend started up went in gear, no problem.
Before the gears problems, my dash gear indicator went out and I had to count gears to get into drive.
Bought the truck used 3 years ago and the Trans temp gauge had never worked.
Once the TCM was replace no gear problems, gear shift indicator came back and now the Trans temp gauge works.
 
The first shop thought it was the main computer, hard time getting a read. Referred me to another shop and inside 20 min they found the problem with the TCM.
 
Happy with fix, very expensive though.

#589 of 1487 2007 broke transmission by wol4rine

Apr 15, 2010 (7:30 pm)

I just got my 07 z71 back today. The transmission had to be replaced. A bearing went out and came apart. 77000 miles!!
  

#590 of 1487 TRANNY CATSTROPHIC FAILURE by harley883

Apr 18, 2010 (3:51 am)

Thats what the dealer called it. I have a 2004 Silverado 5.3 Liter Z714x4 with 85,000. The transmission started slipping when driving home from work and wouldn't shift to 3rd or overdrive. I took it to two of the best transmission garages locally and they gave the same diagnosis.
 
The transmission has failed because the casting of the transmission housing prevents proper lubrication to the 3rd and 4th gears. Depending on how the truck is used may depend on when they finally crap out.
 
I called GM and they said that I needed to take it to a GM dealership to have it diagnosised before they could do anything. Well they told me it was catastrophic failure and they could fix it for 2200.00 but can't guarantee that it won't happen again.
 
If they replace it with a new tranny for 3300.00 they can warrant that it won't happen. DAH !!!!!! must be a problem with that tranny like both shops said. I have found numerous people on the net with the same issue.
 
I have been a devout Chevy man for 33 years and my trucks aren't used for plowing or towing. I see that some people have had this tranny replaced 2,3,4 and 5 times??????????

Messages Page 59 of 149

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