Rear Crossmember Mount bushings 63

[Mike M.]

They usually take a prybar to get the crossmember down. Would some grease on the cups work to make removal easier when installing or would something else work better? Any sugestions?
Thanks Mike

[Chuck R.]

Re: Rear Crossmember Mount bushings 63

I contacted a Permatex rep who confirmed that their anti seize compounds would not degrade the rubber mounts if applied liberally on them.

Chuck

[John H.]

Re: Rear Crossmember Mount bushings 63

Mike -

Not a problem - I use anti-seize on the steel cup in the new bushings before bolting it back up so they'll separate easily the next time it has to come apart. Not an issue, as the contact between the bushing cup and the "sombrero" formation on the frame is metal-to-metal; no rubber involved in that joint.

[Wayne M.]

TSB on this subject

Link to 2nd page with installation notes for Diff X-member.


Note # 2 says to use chassis grease on the sombreros. Anti-seize should be OK; I've used (electrical) silicone grease.

BTW, do torque to the revised higher values (Note # 4: 55-65 ft.lbs), and not the earlier published numbers found in the AIM and service manuals.

Im curious to know if the '67 AIM finally had the correct higher numbers.

[John H.]

Re: TSB on this subject

Wayne -

The torque on those bolts shows as 55-65 in the '67 A.I.M., and was changed from 20-30 to 55-65 on 9/65 in the '66 A.I.M.

[Wayne M.]

Thanks, John ....

... glad they got that passed on to assembly line without delay.

I suppose, theoretically, you could even leave the bolts out entirely, as long as you didn't get airborne, or jack the rear up with the diff unsupported.