Kirkham Differential

NOSMS · #1 (**permalink**) 01-01-2007, 10:54 AM

Yes, the nine inch will fit in a 289. The vent must be move from the top to the back to prevent interference with the upper sheet metal on the rear tower. I always set them up with a vent bung on both top and back and just plug the one you don't use. As for install it is a direct bolt in no cutting or welding, if the frame is to original specs. You are correct on gear changes drop the drive and half shafts, pull four bolt on the houseing and drop it out. Then it is just like changing a nine inch third member and reinstall the housing. If If I remeber correctly we were doing it in under an hour. Also if I am not mistaken to change gear in a salisbury, if you went above or below 4.11 you had to change the carrier also $$$$. As for George he is a great guy and one I have known for years. I don't want to get in a bidding war but I have parts for about 20 of these rearends and I only have two Cobras so I will make sure I am competive on any apples to apples set up for these parts. The price I quoted was for a complete housing, Third member (NEW PARTS) your choice of ratio w/locker, stub axles, bearing/seals, and hub yokes. If this becomes an option which people are interested in we can also go back into production on these with no problems.

I will post a photo in the mourning as well as e-mail them to all those who sent PM.

Thanks for all the interest everyone,

Mike
NOSMS

Anthony · #2 (**permalink**) 01-01-2007, 07:33 PM

Quote:

Originally Posted by NOSMS

. Also if I am not mistaken to change gear in a salisbury, if you went above or below 4.11 you had to change the carrier also $$$$.

My understanding is that it was below 3.07 rears you had to have a different carrier. I would not think that there are too many cobra's with 4.11's or higher rears, using the DANA 44 as supplied in the shelby 4000's.

Power Surge · #3 (**permalink**) 01-01-2007, 07:55 PM

Slight thread hijack... Anthony, were is the quote in your sig from?

NOSMS · #4 (**permalink**) 01-02-2007, 02:11 PM

Anthony thanks for the info on the 3.07 I couldn't remember were the split was. We did run 4.11 and some higher stuff when we raced 289's in the past, depended on the track. As for an aluminum housing we could fab one up but I would want to work with someone who races so we could beat on it before we put something like that into production. Not sure how much weight we could save if any, so it would be just for cool factor. I can play with a solid model and see if the weight goes down much. As for cost not sure at this time. As for timing it might be awhile our military customers just got new budgets to work with so we have lots of work to get done.

Thanks,

Mike

Jac Mac · #5 (**permalink**) 01-02-2007, 08:14 PM

Quote:

Originally Posted by NOSMS

Anthony thanks for the info on the 3.07 I couldn't remember were the split was. We did run 4.11 and some higher stuff when we raced 289's in the past, depended on the track. As for an aluminum housing we could fab one up but I would want to work with someone who races so we could beat on it before we put something like that into production. Not sure how much weight we could save if any, so it would be just for cool factor.

Thanks,

Mike

NOSMS,

We built & raced one with a 'Strange' alloy head & Tru Trac last season & did not manage to break it, in fact had no trouble with it at all. Have put pics of the housing up in my gallery. This was built specially for another car, but I intend adding mount lugs etc to the housing to facilitate mounting in the Cobra/Daytona chassis. Also want to remove a bit of 'fat' from the mold to cut down on the amount of clearance work I need to do in final machine work.

Cheers
Jac Mac