Originally Posted by squire_wj
Yes it is the RC 2inch spacer, I am not a 100% sure on the length. I am not very impressed that I have to pull the rear end off the jeep.
I would not be impressed either. Now you know that 75 mm class 8.8 bolts will fail. 80 mm 10.9 bolts are stronger but 5mm only gains you 2.5 threads so they are still are well short of the depth that the OEM bolts screwed in.
So IMO you are living dangerously with bolts shorter than 90mm
. 90mm bolts with a flat washer will screw in to OEM depth plus one half turn.
OEM flange bolts with just the ball joint go in to a depth of 1.200"
80 mm bolts with flat washer and 2" spacer and the ball joint go in to a depth of .855"
90 mm bolts with flat washer and 2" spacer and the ball joint go in to a depth of 1.249"
I checked the depth of one hole (the drivers side front) to see if a 100mm bolt would work with a 2" spacer. On my diff it would not it, it got tight like the hole was not tapped deep enough or it bottomed out a good 1/16" before it the bolt was down against the spacer. I did not check the other two holes seeing that the only way 100 mm looked like it would work is if you used extra flat washers.