Topic: 68 rear axle housing identification ??

[mhubert89]

hi,

i am restoring my 68 fatsback. i remove the rear differentiel. on the housing i have a vent plug and a bolt. only have seen a housing with a vent. its my housing its original for my 68 ? if so, the vent hose and the brake hose block are not bolt togehter ?

[J_Speegle]

Looking at your signature - your car is a 2 barrel 289 4 speed without the GT package?

We see rearend housings like your pictures in certain big block applications so being a small block is going to be a new twist

[bastille_stango]

Appears to be a 9' rear end (typical rear bumpy shape) only available in GT package
In 1968, GT option was only available for 4 barrels V8

[brennancarey]

Appears to be a 9' rear end (typical rear bumpy shape) only available in GT package
In 1968, GT option was only available for 4 barrels V8

would this axle housing be correct for a early 67 GT 390 ?

[Bob Gaines]

would this axle housing be correct for a early 67 GT 390 ?

67's had the plug in the back until the transition gradually took place sometime in MAY. The book shows end of May but you know how that goes.

[J_Speegle]

would this axle housing be correct for a early 67 GT 390 ?

+1 with what Bob wrote and in addition the dual holes on the drivers side tube would not be an original feature also

[sportyworty]

ALL GT optioned cars in 1968 received the 9 inch rear. That housing is well within 1968 production or later up to 1970


The 4 speed 2 hole housings started with the introduction of the 428 CJ due to interference from the staggered shocks.
I have owned 68 GT 4 speed cars built before the CJ introduction and they did not have the separate outboard hole. The single hole early cars incorporated the vent with the junction block. I believe at this point having restored and dismantled a lot of rear ends and owning a lot of 68 cars that Ford standardized the machining call out for 4 speed 9 inch housings to incorporate the 2nd hole at that point going forward. If your car is a 4 speed and was built sometime in the Spring of 1968 or later in the calendar year it likely retains the original rear housing.

[J_Speegle]

The 4 speed 2 hole housings started with the introduction of the 428 CJ due to interference from the staggered shocks.
I have owned 68 GT 4 speed cars built before the CJ introduction and they did not have the separate outboard hole. The single hole early cars incorporated the vent with the junction block. I believe at this point having restored and dismantled a lot of rear ends and owning a lot of 68 cars that Ford standardized the machining call out for 4 speed 9 inch housings to incorporate the 2nd hole at that point going forward. If your car is a 4 speed and was built sometime in the Spring of 1968 or later in the calendar year it likely retains the original rear housing.

Thanks Kerry for sharing your observations/experience with these

[sportyworty]

Happy to contribute where possible.  This forum is really turning into a go to source for accurate tech.

[mhubert89]

Oki thanks everyone for the information. I only have a 289, 4 speeds , C code so this housing its not the good one for my cars... Just buy the one i need today ! Thanks

[J_Speegle]

Happy to contribute where possible.  This forum is really turning into a go to source for accurate tech.

Try our best and it only happens with good help/members   

Try to stay in our narrow focus with just the facts and no agendas other that promoting as well as supporting reasonable discussion new/possible findings.