Help!! 66 shelby rear case..

I'm no expert, so I'll help you with what I know to be true, then move on to what I believe to be true and hope that Bob or Jeff or some other guru chimes in...

What I know for certain: You need a small bearing housing. The bearing is 1.378" I.D., 2.8246" O.D., 0.8449" width

What I believe to be true: You want a housing without the "hump" on the back. Should be round and smooth for early '66.

What I don't have a clue about, but should be answered before you purchase: whether or not you should have a fill plug or the two dimples common to round housings with a fill plug.

Sorry I can't help you with dates or numbers or backing plates.

Hope that's of some help. Sorry I can't answer it all. Someone will, though.

Josh

 

The housing should have the hump - not the early rounded version

The case would likely (likely because the castings could sit and were not used up in any particular order - and of course you can't see them once installed) a C5AW (from another car in the 1400's)

Date could be out in front of the guessed at build date for the car by even 5-6 months from original cars.

Sorry have not gotten around to looking (if I can see them) the window dates from our car.

Could you remind us again - what number is the car your working on?

 

Compiling all the date info could take months (a short time when you consider getting an answer to just one question posted on a forum would have taken 6 months to a year in the past)


In data I've got from original cars

I see (quick look at a sheet of info)
- trans out as much as 6 months

But that is just the case and it appears - by comparing multiple cars - like some other parts the company cast one day - one time to build up inventory then used those cases for a long period

Mufflers are the same way.... looks like they made certain mufflers every 4-6 months on rotation

- radiator 1-2 months


Still not sure how certain we can be about specific build dates since the dates are not recorded anywhere that I'm aware of. Thought that SAAC only had shipping dates. Guess I should ask Howard what he's using.


As we collect more info from 67 San Jose built cars with real build dates (and compare them to sheet metal and casting dates) we should get a more exact (if that term can even be used) idea of spreads

 

Jeff - I was under the impression that the rounded housings were used until part way through '66. Was I completely misinformed, or did the early round housings show up on the very early '66's? I noticed you said a C5AW was in a car in the 1400's, which makes me think I was completely off base with what I thought to be correct. :blush:

Thanks,
Josh

 

All the running changes can get confusing then add to it that this was a Mustang feature and that Shelby's were not built in specific order using the Ford VIN.

But yes the round 65 style was installed on the first 66's (the carry over cars) then in addition approx the next 250 received the rounded rear housing. So that brings us to about (there is not a single number cut off from my understanding) 5S500 when the first 66 style "hump" housings show up