How much line pressure should a 4L60E have?
Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid.
What should I do if my Chevy 4L60E is not working?
Try a different PCM, and check for chafing where the cables come out of the PCM. Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure.
Why is there no reverse gear on a 4L60E?
4L60E No 2nd Gear This could be caused by a broken drive shell. If this is the case, there will probably be no reverse gear at all as well.
What kind of transmission does Chevy 4L60E have?
The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn’t matter). 1st, 4th, and TCC lockup will not be available.
When to replace boost valve on Chevy 4L60?
If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500″ boost valve (easy fix in pan). Beware of coolant contamination – coolant will cause clutch packs to delaminate and thus cost you a rebuild!
Try a different PCM, and check for chafing where the cables come out of the PCM. Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure.
4L60E No 2nd Gear This could be caused by a broken drive shell. If this is the case, there will probably be no reverse gear at all as well.
The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn’t matter). 1st, 4th, and TCC lockup will not be available.
If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500″ boost valve (easy fix in pan). Beware of coolant contamination – coolant will cause clutch packs to delaminate and thus cost you a rebuild!
Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out.
What can causes low line pressure in a transmission?
Line pressure is normally effected by throttle position and the gear range. Pressure that are lower than specifications are usually caused by leaking seals or a worn oil pump. Higher than normal pressures are usually caused by a faulty pressure regulator.
What should the max pressure be on a 4L60E?
The editor should clamp the max pressure to 96 psi. Also change the Max Pressure to 96, as it usually is 90 stock. If you what firmer shifts, use 50 psi at the 640 ft lb column and 30 psi for softer shifts. I always leave the shift times stock on the 4L60E/4L70E. What vehicle? On the trucks, I halve the upshift torque reduction.
What are the most common 4L60E transmission problems?
No forward movement in OD or D, but L2, L1 and R work: Forward sprag is broken. Transmission must be removed and rebuilt. Try not to run or drive the car or further damage could result. 18. Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed.
Can you change shift pressure on a Silverado 4L60E?
Otherwise you can change the shift pressure itself, add 5-10% should help. Just know that stock 4L60e are weak and don’t take well to hard shifts/high shift pressure and abuse unless otherwise built for it. 2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
How much fluid does a GM 4L60E need?
The 4L60E transmission weighs 146 pounds dry, and 162 wet. It requires 8.4 quarts (9.64″ torque converter) or 11.4 quarts (11.81″ torque converter) of transmission fluid, Below is a list of common transmission problems with the GM 4L60E Transmission and possible solutions to repair.