Transmission Parts

Pinless Accumulator Piston 1-2 & 3-4 Kit Sonnax TH700-R4 4L60E 4L65E 4L70E TH200-4R Upgrade your transmission with the Sonnax Pinless Accumulat...

Boost Valve Kit 4L80-E, 4L85-E From Sonnax Compatible with '91-later units featuring a factory-style sleeve (no O-rings). Can also be retrofitted t...

Sonnax 1-2 And 2-3 Shift Valve Spring Kit for 4L80-E, 4L85-E In GM 4L80-E and 4L85-E transmissions, proper 4th gear operation relies on signal A oi...

Sonnax Servo Release Check Valve Kit for TH700, TH700-R4, 4L60E, 4L65E, 4L70E The Sonnax Servo Release Check Valve Kit 77701-076 addresses key issu...

Sonnax TCC Regulator Valve Kit for 4L80E and 4L85E Transmissions GM vehicles equipped with 4L80-E and 4L85-E transmissions may experience issues su...

Sonnax Oversized Pressure Regulator Valve for 4L60E, 4L65E, 4L70E Transmissions A worn Original Equipment (OE) pressure regulator valve in GM 4L60-...

Piston Kit Pinless Forwad Accumulator Sonnax 4L60E 4L65E 4L70ETransmissions: 4L70E (M70) 2004-UP, 4L65E (M32) 1993-UP, 4L60E (M33,M30) 1993-UP Veh...

Sonnax Boost Valve Kit for 4L60E, 4L65E Transmissions Early Style, .470" Diameter, OE Ratio, O-ring Style GM 4L60-E and 4L65-E transmissions are of...

Sonnax TCC Apply Valve Kit for 4L60E, 4L65E, 4L70E (PWM Units Only) Stop torque converter slip and overheating in its tracks with the Sonnax TCC Ap...

Boost Valve Kit for 4L30-E Large Ratio, OE Code 264 In GM 4L30-E the original equipment (OE) boost valves are crafted from steel, while the sleeves...

Sonnax Line Pressure Booster Kit for 4L60-E, 4L65-E, 4L70-E The Sonnax line pressure booster kit 4L60E-LB2 fits late-style GM 4L60-E, 4L65-E, and 4...

Sonnax Shift Cable Mount Bracket 4L60E 1996/97 4L80E 4L85E 1996 Transmission cases made in 1994 and 1995 have neutral safety switch mounting holes ...

Sonnax Sure Cure Kit for 4L80E And 4L85E Rebuild with confidence and stop "comebacks" with the Sonnax Sure Cure Kit (SC-4L80E). The 4L80E is a heav...

Sonnax Line Pressure Booster Kit for 4L60-E, 4L65-E, 4L70-E The 4L60E-LB1 Line Pressure Booster Kit is expertly designed to fit early-style GM 4L60...

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...

Sonnax TCC Regulator & Isolator Valve Kit for 4L60E, 4L65E, 4L70E The Sonnax TCC Regulator and Isolator Valve Kit 77754-04K is designed to addr...

Sonnax Case Saver Retainer for TH400 & '98-Earlier 4L80-E The Sonnax case saver retainer 34762-10 is the only intermediate clutch retaining rin...

Sonnax Planetary Rebuild Kit for 4L80-E, TH400 Transmissions Optimize the performance of your TH400 or '98-earlier 4L80-E transmission with the Son...