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Vehicles with GM 200-4R, 4L60 and 4L60-E transmissions have numerous converter overheat lockup complaints. These include no lockup or lockup immediately after 2nd ...Read More
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High-speed steel reamer tool Kit for 77917-06, 77917-07
Sonnax oversized O-ring GM-O-17V can be used to prevent leakage in GM 4L60-E piston/damper assemblies and GM 265mm LU viscous damper assemblies with somewhat worn ...Read More
Sonnax offers roller GM-RO-480 required to rebuild the stator clutch assembly for the 4L60-E (280mm) “VJCX” torque converter. 10 Required 52100 Through-hardened bearing grade steel
Reamer for SERV (GM Reman) Valve Bodies
Reamer for 77754-03K, 77754-04K and 77754-ISO
Reamer for 77754-ISO, 77754-03K & 77754-04K
In GM 4L60-E, 4L65-E and 4L70-E units, the AFL valve is a solenoid feed regulator valve that feeds the EPC solenoid and shift solenoids. The OE AFL valve design ha...Read More
Tool kit for 77754-09K, 34200-16K, SC-4L80E and SC-4L60E.
The plastic OE torque converter clutch solenoid snouts are prone to breakage causing them to leak oil that should be directed to the converter clutch apply valve. ...Read More
The 3-2 control valve spring in late-model GM 4L60-E, 4L65-E and 4L70-E valve bodies often breaks, and can cause a 3-2 bind and/or 2-4 band to overheat. This sprin...Read More
Sonnax stator support shaft 77918S-K kit for GM 4L60 and 4L60-E units eliminates sleeve rotation by mechanically fastening the sleeve in place with a set screw, fu...Read More
A performance torque converter is highly specialized based on the performance characteristics of the specific vehicle. And Sonnax has several levels of kits to ens...Read More
In listed GM transmissions, severe wear of the TCC regulator valve bore from the OE valve allows regulated converter apply pressure to exhaust. This is a primary c...Read More
In GM 4L60-E, 4L65-E abd 4L70-E units, wear at the shift valve spools and bore lands causes loss of critical hydraulic pressure which, depending on the wear locati...Read More
In GM 4L60-E, 4L65-E and 4L70-E units, the hammering effect of the 3-4 relay and/or 3-4 shift valves can cause the end plugs to wear, resulting in loss of 4th sign...Read More
It is common for one of the three plastic retention tabs to break on the wiring harness case pass-through connector in GM 4L60-E, 4L65-E and 4L70-E units. This all...Read More
Late GM 4L60-E transmissions use a 300mm converter. The large diameter and weight of this converter rob the drivetrain of acceleration power and throttle response....Read More
GM 4L60-E, 4L65-E and 4L70-E transmissions often have trouble shifting into or holding 4th Gear due to excess wear in the sequence valve bore. This wear allows vit...Read More