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Just had the original diff rebuilt and have it all mounted except for the leaf springs. I decided to order replacement bolts for mounting to the diff. Ordered the 3.5" bolts for this 9 leaf spring from a major supplier. The original bolts measure 3.5" from the tip of the threads to the top of the head. As you can see from the attached photos that the new bolts are about .25" longer than the originals. Leaf spring, bolts, mounting bracket and diff are all original. I read about the critical nature of the bolt lengths to avoid damaging the diff case. Will the new bolts be too long?
Thanks
Mike
Last edited by mtcarl; Today at 02:30 PM.
Reason: replaced photos
I've had one bolt break at the half-shaft yoke cap and one at the end of the rear stabilizer to the bracket on the trailing arm. Took a lot of work to get the broken stub out of the (brand new) yoke. Both were original bolts and before reaching torque.value. You might say I'm a little gun shy. Maybe I'll try to rig up a bench test to see if the original bolts can make it to 60 ft lbs. Another option might be to cut off the new bolts to match the originals. Return postage for the new bolts probably won't leave much credit.
69 Leaf Spring Bolts at Diff
