Earlier this year I took the suspension off to have a bunch of the steel parts plated (details here) and yesterday I finally got around to putting the upgraded rear uprights, stub axles and hubs (details here) on the car. Everything went smoothly except that after torqueing the stub axle nut I gave the wheel a tug and it moved. I was able to move the wheel about 1/4” towards and away from the car with no effort. That’s not right! I tried the other side and it significantly less, but unacceptable, play.
The picture below shows the side with less play. You can clearly see the spline projecting past the hub so the nut is going to bind on the spline’s shoulder and not the hub.
The spline is projecting past the hub causing the nut to bind on the spline rather than the hub
So why does one side have so much more play than the other? If you look at the picture below you will note that the threads on the left stub axle aren’t cut as far as the one on the right so the nut bound where the threads stopped on that side resulting in additional play.
The right has more threads than the left
Bob is the only other person that I’m aware of who has upgraded his rear uprights. While his car isn’t registered yet, he’s had it on a dyno and he’s done a couple of hole shots. He torqued his stub axle nuts, but when he gave his wheels a tug last night he had the exact same problem.
Location of the part number
Superlite has been shipping the upgraded parts on new kits for quite a while, but I haven’t heard about anyone having this issue before. Bob and I have the same SKF Corvette Racing Hubs, but they’re OEM replacements so that shouldn’t be an issue. Do you guys with the newer uprights have this problem? Did Superlite provide a spacer? Do you have the same stub axle?
Upright: SL-RR-UR-02RL
Stub Axle: 108-NI-O-HUV