65-66 rear axle change over?

6R07K · May 17, 2010 at 10:42 PM

G'day Everyone

According to the 4th addition book the 65 diff pumpkin was round and the 66 was more flat with an extension for the ring gear.

What ball park time did this change happen?

I'm looking at a May02 1966 vehicle that looks to have the 65 style.

Cheers

Ben

C6ZZKGT · May 17, 2010 at 11:32 PM Official Post

The changeover was October 1, 1965 according to the Ford master part catalog. There, of course, will be some variance from this as the older stock is used up. Your May 2, 1966 date is way too far off for a variance. How sure are you that the housing is even a Mustang housing?

-Fred-

6R07K · May 18, 2010 at 2:23 AM

G'day

This is what I have to go on.

[Blocked Image: http://i803.photobucket.com/albums/yy314/whitepony_01/Green%20K/14.jpg]

[Blocked Image: http://i803.photobucket.com/albums/yy314/whitepony_01/Green%20K/17.jpg]

C6ZZKGT · May 18, 2010 at 11:15 AM Official Post

The pictures of the center part of the housing to the axle tubes appears correct for the early housing. You need to have a picture towards the rear spring mounts to see if there is a taper in the axle tubes. Even if there is, you probably have an incorrect housing for your build date. The snubber bracket on the third member is also the early version and incorrect for your production date.

-Fred-

6R07K · May 18, 2010 at 8:16 PM

Thanks Fred

This photo is a little further across and shows the tapper.

[Blocked Image: http://i803.photobucket.com/albums/yy314/whitepony_01/Green%20K/15.jpg]

Cheers

Ben

lscman_old · May 19, 2010 at 8:31 AM

I agree as that housing is for the 65 and not for 66.

65-66 rear axle change over?

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