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M

mxp01

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Before getting started let me provide the facts:

- I've got a 1960 BE with an 1100 and ribcase tranny.

When I got the car I got a load of spare parts. Among them were two differentials of different size. One is larger than the other:

- The smaller is about 8in in diameter. From the driveshaft coupling to the outer flange is 7in, and from one end to another is 12 inches. The outer casting has "BTA 548/C" stamped on it and the bearing caps say "ATA 7034."

- The larger one is 9in in diameter. Driveshaft coupling to flange is 8.5in. The entire length is 15 inches. The outer housing has "0820A YRS" stamped on it.

My car runs fine now. Is there any value in keeping these? Is there potential to use these to upgrade performance?

Let me know,
Mike Pennell
 
mxp01 said:
Before getting started let me provide the facts:

- I've got a 1960 BE with an 1100 and ribcase tranny.

When I got the car I got a load of spare parts. Among them were two differentials of different size. One is larger than the other:

- The smaller is about 8in in diameter. From the driveshaft coupling to the outer flange is 7in, and from one end to another is 12 inches. The outer casting has "BTA 548/C" stamped on it and the bearing caps say "ATA 7034."

- The larger one is 9in in diameter. Driveshaft coupling to flange is 8.5in. The entire length is 15 inches. The outer housing has "0820A YRS" stamped on it.

My car runs fine now. Is there any value in keeping these? Is there potential to use these to upgrade performance?

Let me know,
Mike Pennell
Click to expand...
do they both have mowog on them somewhere?
 
The larger one might be a MGB/MGA banjo unit, what are the ratios, you should see a fraction stamped on the ring gear that will tell you that, just divide the smaller number into the larger one, and that's your ratio.
 
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