Nv4500 part 500

.004 end play. Absolutely perfect. .002-.006 is the allowance
Used .017 total shim.

I bought a 1 7/8 Proto socket at Pacific Industrial and modified it to turn the 5th gear retention nut.

I started by turning the rear flat so I could weld on a 3/4 inch drive. I boared out the old star drive so the Modified socket would fit over NV4500main shaft tail.

I then boared out the socket to acomadate the 5th gear retention nut.

I drilled and tapped 3 holes coresponding to 3 glad lands on the 5th gear retention nut. We found a custom socket from a long forgotten project and cut off the 3/4 inch drive hole. This was welded onto the modified Proto socket. 

The shift collars were set to the transmission was in both 1st and 4th gear. This way the gears were jammed and the main shaft could not rotate.

I drilled the first hole a little to far back on the socket. The second hole ~1/16 from the shoulder worked well.

This shim kit from Valley Gear worked perfectly.

The modified Proto socket ready for action. 

Checking end play.

Result .004 end play. Absolutely perfect. .002-.006 is the allowance

Used .017 total shim.

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