View Full Version : Rudd Stuff Spring Perch Question

August 5th, 2017, 10:28
I'm preparing to swap an 8.8 into my 91 XJ so I bought the Ruff Stuff 8.8 kit. I mocked them up but the spring perches don't fit down onto the axle tubes because they have little protrusions. Without those, they look like they would fit great. What am I missing? Should I grind them off? I measured the tube diameter and confirmed I had the right part number with Ruff Stuff before ordering. Thanks.

August 5th, 2017, 11:11
Grind to fit, but remember to bevel the edges back!

August 5th, 2017, 11:42
If I remember correctly, those protrusions are there so it can also fit a smaller diameter tube.

Just make sure, like was said, you bevel the weld area since you wont have the bumps to give you the weld gap.

August 5th, 2017, 12:32
Great. Thanks for the tip to bevel for welding, I'll be sure to do that. I have a good welder I plan to enlist to help also.

August 6th, 2017, 07:39
I agree to grind the nubs off to fit the tube.

I disagree with beveling the perches. It is a fillet weld, not a butt weld. I fit steel for a living. I've never seen a print call out beveling for a fillet joint. Use a welding machine with sufficient amperage to burn in a good weld. I used a Hobart Handler 187, a 220v machine that puts out 185 amps max. Burned them in nice and hot, wrapped the ends as best I could get the MIG gun in there.

If you choose to bevel the perches, then I would suggest two passes to get a good sized fillet weld. One in, one over. At that point I would be concerned about putting too much heat into the tubes and warping them.