Rebuilt 8.75 Sure-Grip - resistance and clunk

What was the ratio before?

What is the ratio now?

Does it do the same when in neutral?

You might just be feeling more engine braking due to a different ratio!

If it does it in neutral I would check the brakes.

With both rear wheels off the ground get it up to about 50 and put it on neutral, do the tares slow at an expected rate?