This is what some who have done the job has to say.
High Speed Surging - Vehicles with 4T65E Transmission
* Surging at high speed may be caused by leaking torque converter regulator valve train bore plug seal.
May set code P0741, TCC stuck off.
* Tcc apply valve and tcc pressure regulator valve both fail causing po741 or po742. This is caused by a worn valve body where the solenoid valves ride in. Repair kits are sold for about 100 bucks each plus 50 per valve. The kit contains reamers and oversized drill bits. The updated valves are hardened steel sleeves that are inserted into the valve body after oversizing the ports. The oe valve body wheres because of the pot metal it is made from. The new oversized valves will never where out after this repair
* HAVE DONE THIS ON 4L60E VALVE BODIES FOR A P1870 AND FIRM 1-2 SHIFT. DID 11 VEH.'S. 100% FIXED.
PARTS AVAILABLE AT AXIOM AUTOMOTIVE
Wednesday, October 26th, 2011 AT 7:51 AM