Swapped out the rack today. The left side blew the seal. My left lower control arm is bent which might have been that way when I put it in since it did come from a wrecked car. Anybody with a CV IFS in their F100 have problems with the lower control arms. This is the shaft at the rear mount. I found a control arm & will be picking it up either Monday or Tuesday. Not sure when I will get it installed but gonna push so I can focus on the IRS and engine.