Diff to x-member mounting washer

[Steve L.]

The AIM shows lock washers under the 4 bolts that hold the Diff to x-member. My unmolested 73 has flat washer with no lock washer.

These flat washers look distorted into a cup shape. Did they change to flats because the x-member holes are too big and lock washers won't work?

Which is correct?

[Timothy B.]

Re: Diff to x-member mounting washer

Steve,

The flat washers are correct, there is no need for the lock washer. I would put a drop of loctite on each but not the red stuff. You may want to remove these sometime in the future.

Make sure the four attaching bolts are grade eight..

[Michael W.]

Re: Diff to x-member mounting washer

Make sure the four attaching bolts are grade eight..

Why? Were the original bolts grade 8?

[Gary R.]

Re: Diff to x-member mounting washer

I use gr 8 with lock washers. They hold tight and no one is going to see them anyway.

[Steve L.]

Re: Diff to x-member mounting washer

Thanks,
Flats with blue loktite it is.
Dr R and Paragon sell these sets with splits. They must be following the AIM.

I suspect that the x-member holes are too big for splits to work properly. I'm gonna check this out.

[Joe L.]

Re: Diff to x-member mounting washer

Why? Were the original bolts grade 8?

Mike-----


The original bolts were GM-300M material grade (SAE grade 8).

[Graeme B.]

Re: Diff to x-member mounting washer

Steve, I wondered the same. My mid '69 has flat washers too.