GM 4L60E Valve Body, Pump Testing and Repair - 1995 Unit

I comprehensively test the valve body and pump out of a 1995 4L60E. I have a similar video on the channel but for a 2009+ unit so I decided to film and post a similar vid for an early model.

I also discuss the various problems and drivability symptoms that have their root causes in the hydraulic circuits within the pump and valve body.

The testing reveals several areas of weakness which I remediate with drop-in corrective parts, including those from Sonnax and Transgo.

4L60E Sonnax Vac Test Instructions: https://d2q1ebiag300ih.cloudfront.net...

4L60E LB1 Sonnax Boost Valve:
https://www.sonnax.com/parts/2168-lin...

Transgo 4L60E Pressure Regulator Valve:
https://transgo.com/product-details/4...