June 06, 2018
All Over the Map: Attacking 4L60/E Burnt 3-4 Clutches with Confidence
Brian Wing
Symptoms:
- Worn pump bushing
200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E, 5L40-E, 5L50-E, Powerglide
Bushing
Part No. 77005T
Find a Distributor
Sonnax bushing 77005T is a direct replacement for the GM 4L60, 4L60-E, 4L65-E, 4L70-E pump bushing and an upgrade for the 5L40-E, 5L50-E and 200-4R. This bushing also can be used as an upgrade in the Powerglide high clutch drum. The bushing is PTFE lined like the OE 4L60 series bushing for superior, long-term wear characteristics.
- Bushing Style: Precision
- Material: Bimetal, PTFE-lined
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
GM 5L40-E, 5L50-E Valve Body Layout
GM 200-4R Valve Body Layout
GM 4L60 (700-R4) Valve Body Layout
GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout
January 29, 2020
Bushwhacked! Keys to Avoiding Preventable Bushing Problems
Brian Wing
Related Sonnax Parts
Required
Recommended
4L60
The Sure Cure® Kit SC-4L60
-
Helps cure:
- 3-4 Clutch failure
- Burnt clutches & bands
- Excess pump noise
- Low line pressure
- Low line rise
- Low Reverse boost
- 2-3 Shift feel poor
- Early upshifts
- Soft upshifts
- Soft shifts
- Slide shifts
- Delayed Reverse
Required
Recommended
4L60-E, 4L65-E, 4L70-E
The Sure Cure® Kit SC-4L60E
Fully compatible with '95-later with PWM/EC3 (electronically controlled capacity clutch) control.
-
Helps cure:
- 3-4 Clutch failure
- Burnt clutches & bands
- Pump noise
- Reduced 3-4 clutch life
- Rotor fracture
- Erratic line pressure
- Low line rise
- 1-2 Harsh
- 2-3 Shift feel poor
- Poor shift quality
- Code 894, 1870
- Falls out of lockup when hot
- No lockup
- TCC slip