4L60e issues after rebuild.
May 28th, 2022, 3:51 PM
#1
4L60e issues after rebuild.
I just had my 4L60E rebuilt. Its pretty much stock other than beast sunshell and transgo shift kit with corvette servo. Converter was replaced twice, once during rebuild process then again after the fact because I was given a high stall converter, but needed low stall.
Issues I've seen since we put it back in:
1- Low pressure in all gears. park is 40, reverse is 35, drive is 40 (change to this below)
2- At take off, the engine rpm goes up, but the transmission doesn't go into gear until rpms reach around 1300 to 1500 rpm with a solid kick into gear.
3- around 45-55 mph, it seems like torque convert clutch goes in and out with a slight rpm jump of 200-300 rpm every 5-10 seconds. (this is normally after driving 20 minutes and getting warmed up)
4- harsh 1-2 shift after 20+ minutes of driving.
Things that I have done to try and figure out the problem:
1- I have replaced all solenoids in valve body to see if that was causing any type of issue.
2- checked all valves in the valve body, everything SEEMED fine, but I'm no expert and I don't know for sure.
3- adjusted the pressure control solenoid 1/4 of a turn to raise pressure up some to see if this helps with anything. (this had been reverted)
4- took main connecter off and checked pressure that way to see if it was electrical issue, pressures went down more.
As far as the pressure reading, I have replaced the boost valve due to it being installed wrong. I bought a transgo .500 boost valve and installed it myself. Pressures went up, but not to what I have seen people state that I should be seeing. Disconnected the main harness after boost valve was installed and got the following reading right after start.
Park: 180 jump down to 118-120
Drive (I believe is 3rd with main disconnected if im not wrong): 100
Reverse: 110-113
Any help would be appreciated, I have no idea what else to look for and the person that rebuilt it is not doing any more work at this time for some personal reason. I don't want to spend much more money when I just had it rebuilt
Issues I've seen since we put it back in:
1- Low pressure in all gears. park is 40, reverse is 35, drive is 40 (change to this below)
2- At take off, the engine rpm goes up, but the transmission doesn't go into gear until rpms reach around 1300 to 1500 rpm with a solid kick into gear.
3- around 45-55 mph, it seems like torque convert clutch goes in and out with a slight rpm jump of 200-300 rpm every 5-10 seconds. (this is normally after driving 20 minutes and getting warmed up)
4- harsh 1-2 shift after 20+ minutes of driving.
Things that I have done to try and figure out the problem:
1- I have replaced all solenoids in valve body to see if that was causing any type of issue.
2- checked all valves in the valve body, everything SEEMED fine, but I'm no expert and I don't know for sure.
3- adjusted the pressure control solenoid 1/4 of a turn to raise pressure up some to see if this helps with anything. (this had been reverted)
4- took main connecter off and checked pressure that way to see if it was electrical issue, pressures went down more.
As far as the pressure reading, I have replaced the boost valve due to it being installed wrong. I bought a transgo .500 boost valve and installed it myself. Pressures went up, but not to what I have seen people state that I should be seeing. Disconnected the main harness after boost valve was installed and got the following reading right after start.
Park: 180 jump down to 118-120
Drive (I believe is 3rd with main disconnected if im not wrong): 100
Reverse: 110-113
Any help would be appreciated, I have no idea what else to look for and the person that rebuilt it is not doing any more work at this time for some personal reason. I don't want to spend much more money when I just had it rebuilt
Last edited by Atlsoldier27; May 28th, 2022 at 3:53 PM. Reason: Entered wrong number.
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