Symptoms:
- Low line rise
- Pin bore wear
- Early upshifts
- Soft upshifts
- Premature 3-4 clutch failure
Cause:
Many throttle valves have been modified or replaced with a kit version during previous rebuilds. This often alters performance, rendering the core unusable.Correction:
Sonnax direct-replacement, drop-in throttle valve aids in restoring the core to original condition by following the OE design.4L60
Throttle Valve
Part No. 77968-02
Fits both aluminum sleeved and non-sleeved units.
You need this if... View Instructions Find a DistributorIn GM 4L60 units, modifying or replacing the throttle valve is a common practice during rebuild, but these modifications and replacements often alter performance, leaving the core unusable. Sonnax replacement throttle valve 77968-02 aids in restoring the core to original condition by following the OE design.
- Valve is made from hardened steel
- Follows OE design
- Salvages cores
- Drop-in Zip Valve™ installs quickly and easily
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 4L60 (700-R4) Valve Body Layout
You need this if...
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.
Related Sonnax Parts
Required
Recommended
4L60
Oversized Throttle Valve 77968
Not compatible with early '82–'90 aluminum sleeve units.
-
Helps cure:
- Low line rise
- 3-4 Clutch & band failure
Required
Recommended
200-4R, 4L60, TH200, TH200C
TV Plunger Spring 77968-01K
-
Helps cure:
- Low throttle pressure
- Low line pressure