Transmission Parts

Sonnax 3rd Accumulator Checkball and Seat for TH200-4R 4L60, 4L60E, 4L65E, 4L70E For the TH200-4R, 4L60, 4L60E, 4L65E, and 4L70E models, wear or th...

BUSHING CASE SONNAX "NO WALK OUT" TH400, 4L80E, 4L85E The OE case bushing in vehicles with a GM THM-400, 4L80-E and 4L85-E transmissions tends to w...

Kit Piston Accumulator Sonnax 1st-2nd Clutch TH125 3T40 TH125C M34 MD9 GM vehicles with 125 or 3T40 transmissions may have problems with burnt forw...

Sonnax O-Ringed End Plug Kit for 6L45, 6L50, 6L80, 6L90 The OE end plugs in GM 6L45, 6L50, 6L80, and 6L90 valve bodies are designed to prevent crit...

Boost Valve Kit for 4L30-E Medium Ratio, OE Code 448 In GM 4L30-E units, the original equipment (OE) boost valves are constructed from steel, while...