She Loves Trannies
Thread Starter
8th Gear
Joined: Mar 2015
Posts: 8
Likes: 0
From: Georgia
She Loves Trannies
Well, it's happened again. My 4L60e has failed again.
The first time, the main seal came out. I decided that it would be a good idea to build the transmission before I added anymore power.
The shop I trust pulled the trans, and sent it out...
it went back in and was back on the street asap.
4000 miles later the 3/4 clutch pack was gone.
Simple! The tranny was under warranty. We did the pull and rebuild again.
3000 miles passed and now fourth gear is gone and the 1-2 shift is softer than a kitten.
What rebuild Kit would you recommend?
The first time, the main seal came out. I decided that it would be a good idea to build the transmission before I added anymore power.
The shop I trust pulled the trans, and sent it out...
it went back in and was back on the street asap.
4000 miles later the 3/4 clutch pack was gone.
Simple! The tranny was under warranty. We did the pull and rebuild again.
3000 miles passed and now fourth gear is gone and the 1-2 shift is softer than a kitten.
What rebuild Kit would you recommend?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Couple of questions??
What Hp/Tq level are you at now and what are your end goals?
WHERE is your shop sending the trans for work??
You need a competent shop that specializes in modifying the transmission to the level that you will be pushing it to.
Here is my recommendation. If Rick does the work, that will be a ONE TIME DEAL!
http://rktperformance.com/
What Hp/Tq level are you at now and what are your end goals?
WHERE is your shop sending the trans for work??
You need a competent shop that specializes in modifying the transmission to the level that you will be pushing it to.
Here is my recommendation. If Rick does the work, that will be a ONE TIME DEAL!
http://rktperformance.com/
Racer
Joined: Apr 2013
Posts: 253
Likes: 3
Building a 4L60E for a performance application takes a huge amount of very specific knowledge. GM designed 6 different flaws into them that need to be addressed to keep the 3-4 clutches alive. We need to correct things like apply pressure, shift timing, clamping force, accumulation, and clutch/steel material. Most general transmission builders either don't know what these flaws are or they don't know how to correct them. We routinely get 4L60Es in my shop that have been built 4,5, 6, or more times. It's a shame that so many people blame the 4L60E because they've had too many build it wrong. It can be built to be a very capable transmission that can take a huge amount of power.
Frank
Frank
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I looked on You Tube and searched 4L60E performance rebuild and watched some very interesting clips on what components that require up-grading. VERY INTERESTING!!!
YES,, the PCM Programming needs to be spot on for a reliable and properly shifting unit.. Especially is you have different rear end gear ratios than OEM stock..
Bill
YES,, the PCM Programming needs to be spot on for a reliable and properly shifting unit.. Especially is you have different rear end gear ratios than OEM stock..
Bill
