In this post, we will show and demenstrate the process taken to complete a 1963 Corvette Transmission and Differential Disassembly.

We disassembled and inspected the differential on the Corvette and also opened and inspected the transmission.

 The differential assembly

Yellow Assembly mark on the yoke.

Yellow assembly mark on the case.

 We found that the gears have been changed to 4.56:1 ratio instead of the stock ratio of 4.11:1.

I had a call into the differential supply company and awaited a return phone call to determine if the positraction unit will work with a 4.11:1 ratio.

 The gears that are installed now would cause you to have excesive engine speeds on the freeway as well as the speedometer and odometer to be off calibration which would result in a PV failure.

 Draining out the differential.

 Assembly marks inside the differential.

 Removing the axle stubs.

 Removal of differential gears.

 Yellow assembly paint on the lower transmission shift cover.

 This is not the correct clutch fork.  The good news is that I found an original one on E-bay.

 The shifter assembly.

The center shift arm appears to have been replace with a homemade shift arm. We will need to get a correct replacement.

 The transmission stripped down.

Here you can see the VIN number stamped into the transmission housing 12105.

 Stripped mounting hole on for the shifter.  We will need to drill this out and install new threads.

When I drained the fluid I found a lot of metal flakes in the oil this is not a good sign.

 The transmission after draining.

Here is a better view of the differential assembly marks after cleaning in the parts washer.

Click to see the transmission be rebuilt!