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Old 03-13-2017, 12:39 AM   #3
'63GENIII
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Join Date: Sep 2008
Location: San Carlos, Ca.
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Re: 4L65E shift problems denali

Quote:
Originally Posted by Bigdav160 View Post
3-4 clutches burned up?
What year Denali? '07-'08? I wouldn't think that the purge and vent codes would cause transmission issues. I just saw those codes on a friend's Tahoe. Weird thing is, they also had an alert for "service stabilitrac". It shifted fine to me but it might have an effect on shift strategy, points etc?

On our '04, rpm would flash on the 1-2 shift. It went that way for quite a while until we saved up for a rebuilt that I installed.

Clinebarger is pretty well regarded as an automatic trans oracle here. He helped me spec out the parts and upgrades for our 4L65E. Couldn't be happier with the transmission which is going on a couple of years of my wife abusing it.
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'63 k15 long step
Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205
52" front and 63" rear spring swap
D44 / 14bff - disc axles
Milemarker 9K and 10.5K hydraulic winches

63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread


NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build

L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29
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