I replaced the pinion seal on the HO72 third member I bought that has the 4.10 gear ratio. It is out of a 1972 C20. Going by the service manual for a 1972 C20 truck the pinion nut torque spec is 220lbft but I had to go up to 230lbft in order for the cotter pin hole to line up with the nut. Am I in any danger running the pinion nut 10lbft of torque more than what is required?
No. That rear end uses a spacer between the brgs. That is the normal procedure for tightening on the HO72 & HO52 rear ends.
