Thom,
I don't really know which cars have the 3.54 axle. I got mine from Earl Kagna in B.C. He had a couple of them at the time. I'll bet that Sherlock would know such a thing. The axle is the Austin A90 type.
I used the entire pumpkin. Just bolted it in. Earl had actually run & tested it for leaks & noise before the sale.
For me it was worth the effort. I'm not exactly in the flat land. As you say, first gear was so low as to be practically useless. It now works as a very good gear. It will still burn the tires on a start, just takes more throttle. What I really like is being able to cruise at 78 mph & turning 3,000 rpm. (28% overdrive) The top speed is actually higher in direct fourth than in OD, but I don't run top speed very often.
Sorry, I just go by the tach & mental notes for speed. Around 2,200 rpm is 60 mph in OD. 2,600 is 70. 3000 is about 80. The plan is to have the speedometer recalibrated by MOMA (Motor Mart), New Mexico when I'm in the mood. Margaret told me that a gear change inside the speedo would do the trick.
D
PS,
I found a bit more info on the BMC C series axles;
3.54 is marked 39/11
The differentials fitted to the Isis is of the C-series type.
Here is a brief list of which ratios were used, and where:
4.1:1 Isis, Wolseley 6/90, Austin A90 c.19mph/1000rpm 15" rims
3.9:1 Austin A99-A110, Wolseley 6/99-6/110 with Manual Transmission ?
3.54:1 Austin A99-A110, Wolseley 6/99-6/110 with Automatic Transmission
D
[ 02-04-2004: Message edited by: Dave Russell ]</p>