2007 CHEVROLET SILVERADO 2500 HD, 4L80-E

No lock up

warm

Vehicle driven in with code P0894 Transmission Component Slipping. High line pressure rise resulting in harsh shifts. Found TCC slippage to be approximately 200-300. Pulled trans replaced Torque Converter, TCC solenoid, internal wiring harness and installed sonnax bushing on stator. Disassembled trans to check all clutch packs and bands and trans looked new. Reassembled reinstalled and test drove. Same problem still there. Pulled back out to replace pump assy, valve body assy and input shaft with all new sealing rings. Road tested and code came back on. Air checked torque converter, pump, stator and all tcc circuits.Went through both valve body assys paying particular attention to tcc valve and springs, everything looks good. Sent vehicle to another shop to check out all external electronics, they say everything is good there. Anybody seen this code before and what did you do to get rid of it. Tired of pulling it out. 4 times already with no results. Any help would be greatly appreciated. Again, a code P0894

P0894

Code P0894 Transmission Component Slipping

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