HELP me diagnose a 4L60 issue please
07-30-2010, 09:48 AM
#1
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HELP me diagnose a 4L60 issue please Just sold the tranny in my 01 SS to a gentleman on this site and after the install of it he is having issues.
After the install he drove it to work and back home no problem and then washed the car when he got home. Now as soon as he puts it in gear the car stalls.
If he jacks the rear end up and puts it in gear and lets the car idle it is fine but as soon as he hits the brakes the car will stall.
he is getting a P0740 tcc circuit malfunction code.....car has a stock stall converter BTW.
thanks in advance!!!!
Kevin
After the install he drove it to work and back home no problem and then washed the car when he got home. Now as soon as he puts it in gear the car stalls.
If he jacks the rear end up and puts it in gear and lets the car idle it is fine but as soon as he hits the brakes the car will stall.
he is getting a P0740 tcc circuit malfunction code.....car has a stock stall converter BTW.
thanks in advance!!!!
Kevin
07-30-2010, 10:28 AM
#2
Just sold the tranny in my 01 SS to a gentleman on this site and after the install of it he is having issues.
After the install he drove it to work and back home no problem and then washed the car when he got home. Now as soon as he puts it in gear the car stalls.
If he jacks the rear end up and puts it in gear and lets the car idle it is fine but as soon as he hits the brakes the car will stall.
he is getting a P0740 tcc circuit malfunction code.....car has a stock stall converter BTW.
thanks in advance!!!!
Kevin
After the install he drove it to work and back home no problem and then washed the car when he got home. Now as soon as he puts it in gear the car stalls.
If he jacks the rear end up and puts it in gear and lets the car idle it is fine but as soon as he hits the brakes the car will stall.
he is getting a P0740 tcc circuit malfunction code.....car has a stock stall converter BTW.
thanks in advance!!!!
Kevin
Might end up needing to ohm out the tcc wire from the trans connector to the computer. and check all the wiring in the trans pan for shorts to ground.
07-30-2010, 07:58 PM
#5
So far the tranny does work in limp mode with tranny unplugged. Found no broken, pinched or anything else out of the ordinary. Which leads me to believe the lock up solenoid is stuch. Still the only code is P0740. Any other ideas out there. Thanks Shawn
07-30-2010, 10:41 PM
#6
P0740 is an electrical code for the TCC circuit. P0742 would be a mechanical problem.
It could be anything in the circuit from the tcc solenoid coil to the PCM, and all the wiring in between.
The easiest test I can think of is to cut the tcc ground wire in the big plug, I guarantee it'll either unlock or the wire has a rub through to ground inside the pan. This will tell you if the wire has a ground fault on the harness side, or in the pan.
And even if that works it'll still throw the 740 code because of the break in the tcc solenoid wire.
07-31-2010, 12:19 PM
#7
Just got done pulling the pan still no pinched or bare wires. My repair manual doesnt have a diagram to show me which solenoid is for the lock up so if anyone has a link to one that would help.
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07-31-2010, 12:50 PM
#8
The TCC wire on the big plug is light tan with a black stripe.
It goes to pin 42 on the red pcm connector.
As far as I know the solenoid is powered with 12 volts and operates by the pcm grounding it.
Last edited by Jays_SSZ28; 12-22-2017 at 10:04 PM.
07-31-2010, 12:54 PM
#9
Its just a simple a4-a4 swap I drove 34 miles to and from work with no trouble then start it and this happens. I still have the old tranny laying on the floor beside the car. If i knew which solenoid it was i would just switch the because the old one worked it was missing 3-4 gears. Thanks Shawn
07-31-2010, 12:59 PM
#10
Also tranny came out of an 01 ss and I have it in a 99 TA. Wiring is still the same correct? I also noticed with the rear end off the ground it would stay running but if you tapped the gas the gas peddle pulse back out right away. Thanks Shawn
Last edited by tug686spd; 07-31-2010 at 01:03 PM. Reason: forgot something
07-31-2010, 01:31 PM
#11
I think your gas peddle issue is traction control. You mean the gas peddle pushes your foot back?
The tcc solenoid is the bottom pic in my post above, heres another view of it.
The pwm solenoid needs to be removed to get the tcc solenoid out. The pwm solenoid is held in with a clip that sticks out of the slot in the valvebody.
The tcc solenoid is the bottom pic in my post above, heres another view of it.
The pwm solenoid needs to be removed to get the tcc solenoid out. The pwm solenoid is held in with a clip that sticks out of the slot in the valvebody.
07-31-2010, 01:35 PM
#12
If you swap out the tcc solenoid you need to cut and splice the wires. I'd cut the negative wire and ohm it to ground (the harness side) if it's grounded then the problem is not the solenoid.
07-31-2010, 10:10 PM
#13
Well it is done, it ended up being a bad lock up solenoid thanks for all the help. the only problem now is the tcs off light is on all the time, cant turn the tcs back on but i will figure that one out later. Thanks again Shawn
