Sonnax

4L60E 4L65E 4L70E TCC Apply Valve Kit (PWM Only)

Vehicles with GM 4L60-E, 4L65-E and 4L70-E transmissions have numerous converter overheat lockup complaints. These include no lockup or lockup immediately after 2nd Gear when fluid warms up, caused...

4L60E 4L65E Sonnax Boost Valve Kit | Early Factory Style | .470''

Early style, .470" dia., OE ratio, factory style GM 4L60-E and 4L65-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty...

4L60E 4L65E Sonnax Boost Valve Kit | Early O-Ring Style | .470''

Early style, .470" dia., OE ratio, O-ring style GM 4L60-E and 4L65-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty...

4L60E 4L65E Sonnax Boost Valve Kit | Early O-Ring Style | .490''

GM 4L60-E and 4L65-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty cycle of the EPC solenoid causes the boost sleeve...

4L60E 4L65E Sonnax Boost Valve Kit | Late O-Ring Style | .421''

Late style, .421" dia. OE ratio, O-ring style GM 4L60-E, 4L65-E and 4L70-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The...

4L60E 4L65E Sonnax Boost Valve Kit | Late O-Ring Style | .472''

Late style, .472" dia., OE ratio, O-ring style GM 4L60-E, 4L65-E and 4L70-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The...

4L60E 4L80E EPC Solenoid Harness Adapter

4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E EPC Solenoid Harness AdapterPart No. 34435-01K For use with early-style (’92-'02) EPC solenoid in late-style (’03-later)...

4L60E 4L80E Sonnax Sure-Cure Tool Kit

4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E Tool KitPart No. 77754-TL Tool kit for 77754-09K, 34200-16K, SC-4L80E and SC-4L60E...

4L60E 4L80E Transmission Shift Cable Mount Bracket

4L60-E, 4L80-E, 4L85-E Shift Cable Mount BracketPart No. 34913-01 Transmission cases made in 1994 and 1995 have neutral safety switch mounting holes but do not have the top mount...

4L60E 700R4 4L65E 4L70E TH200-4R HD Pump Slide Pivot Pin (5-Pack) Sonnax

700R4 4L60E 4L65E 4L70E TH200-4R Transmission Pump Slide Pivot Pin Sonnax Part Number: 65797 Pack of 5 Vehicles with 4L60 & E and THM 200-4R transmissions can have low or high line pressure due...

4L60E Oversized Pressure Regulator Valve (SONNAX) (1993-UP)

TOOLING REQUIRED: 77917-TL  or 77917-TLC  A worn OE pressure regulator valve can be detected in two ways. The first is a dynamometer test that reveals low line pressure during boost...

4L60E|4L65E Sonnax Boost Valve Kit "Factory Style" .490'' | 77898E-3K

Early pump design, .490" Dia., Factory style sleeve, no o-rings Dia.: 0.490" Vehicles with a 4L60-E and 4L65-E transmission frequently have poor line rise, which can result in 3-4 clutch, 2-4...

4L60E|4L65E|4L70E Sonnax 3-2 Control Valve Spring 77754-23

GM 4L60E/4L65E/4L70E 3-2 Control Valve Spring Sonnax Part No. 77754-23 The 3-2 control valve spring in late-model 4L60-E and 4L65-E valve bodies often breaks, and can cause a 3-2 bind and/or...

4L80E #7 Low/Reverse Checkball Seat (1995-UP) 5-Pack

Vehicles with GM 4L80-E and 4L85-E transmissions commonly exhibit wear in the #7 low/Reverse checkball seat location. This issue is caused by normal movement of the checkball and slight movement of...

4L80E 1-2 & 2-3 Shift Valve Spring Kit - HD

In 4th Gear, signal A oil force must overpower the 1-2 shift valve spring and opposing signal B pressure in GM 4L80-E and 4L85-E transmissions. If the 1-2 shift valve does not remain fully stroked,...

4L80E 3rd & Reverse Checkball Sleeve Kit (1995-UP)

4L80-E, 4L85-E 3rd & Reverse Checkball Sleeve KitPart No. 34200-47K Fits units '95-later. Vehicles with '95-later GM 4L80-E and 4L85-E transmissions commonly exhibit wear in the Reverse...

4L80E 4L85E Externally Adjustable Low/Reverse Servo Kit by Sonnax

4L80E 4L85E Externally Adjustable Low/Reverse Servo Kit by Sonnax Externally Adjustable Low/Reverse Servo KitPart No. 34914-28K   Designed for GM 4L80-E and 4L85-E racing transmissions,...

4L80E 4L85E Performance Pack by Sonnax

4L80E 4L85E Performance Pack by Sonnax Part No. HP-4L80E-01   Sonnax Performance Pack HP-4L80E-01 upgrades GM 4L80-E and 4L85-E transmissions for maximum performance and durability in...

4L80E 4L85E Reverse Checkball Sleeve (95-Up) by Sonnax

4L80E 4L85E Reverse Checkball Sleeve (95-Up) by Sonnax Reverse Checkball SleevePart No. 34200-38 Fits units '95-later. Package Quantity: 4 Vehicles with '95-later GM 4L80-E and 4L85-E...

4L80E 4L85E TCC PR Valve O-Ringed End Plug Kit

O-Ringed End Plug KitPart No. 34200-05K TCC & PR Valves OE end plugs are designed to prevent critical pressure loss by capping the bore, while also functioning as a valve stop. Repetitive...