4th gen rear brake knock back....need solution

[Pranav]

I spoke with the guy that makes the thicker clips, and where the critical part is hardening

He's willing to make a set for us if I can get a few guys to commit

Need to talk to Al and see if I can get the blessing for this to be a test run for a 2020 RCR, but the single best thing I did to kill knock back is replacing worn c clips

If I can further redurlce end play by .01 on each side it will be mint.

All the bullshit around axle end flex and caliper springs pales compared to simply taking out end play with thicker or not worn c clips

[Supercharged111]

I just ordered some Dorman clips off of Amazon, nobody had any in town. We'll see what the car does on Feb 24th cheatin bastard practice day.

[Den34]

I had success by welding a small bead on the end of the axle and grinding or "tuning" it so size allowing a small amount for heat expansion. Ran those axles for years.
Bob

[Supercharged111]

I had success by welding a small bead on the end of the axle and grinding or "tuning" it so size allowing a small amount for heat expansion. Ran those axles for years.
Bob

Uncanny. Ryan just mentioned the same thing to me. I measured .029" play on the right side and .044 on the left, and .007" on the diff pin where the axles have been smooshing into it.

[Al Fernandez]

We'll have to measure the play on mine since it has c clip eliminators and I have plenty of knockback.

[Supercharged111]

Dorman clips came in today, they measured .159" thick. My old ones were .152" and .153", so definitely thicker. That plus a rosette weld on the axle end should have me good to go here. Going to leave a .010" gap per side, or as close as I can get. That'll eliminate.053" of end play. Along with new rear pads and tighter front hubs should be a more confidence inspiring car.

[Supercharged111]

I rosette welded the axles and got it down to ~.0115" on one side and ~.0135" on the other. I feel like the c clips got rid of more than just the 6 and 7 thou that I measured. We'll have to see how the car feels now at a cheatin' bastard practice session.