James Densley wrote:
>
> I am wondering if it is possible to figure out the differential ratio, or
> number of teeth on the ring gear without taking off the cover and just
> counting. Can you jack up one rear wheel, put it in neutral and turn the
> wheel and see how many times the drive shaft rotates for each wheel
> rotation? Or do the planetary gears come into play? I would think that
> if it was done on the r.h.s. it could be possible.
>
> Jim
jim, as long as it is not a limited slip or locked rear end, this is how
you do it. raise the car so both wheels are free to turn (car in
neutral) and block 1 wheel so it will not rotate. mark the other wheel
and the driveshaft so you know where you started. rotate the driveshaft
until you get a full turn of the wheel. multiply this times 2 and that
is the ratio (you have to interpolate a little) example if a spitfire
has a 3.89 diff ratio it will take almost 2 full turns of teh driveshaft
to get a full turn of the wheel - almost 2 time 2 = almost 4 or 3.89.
the same spitfire with a 4.1 diff would take just a little more than 2
turns of the driveshaft - 2= times 2 = 4+ or 4.1. this work for any car
. you just need to know what ratios were available. ted
--
Ted Schumacher
TS Imported Automotive
404 Basinger Rd.
Pandora, Ohio, USA 45877
Ph. 800/543-6648 (sorry, USA only)
Ph. 419/384-3022 - tech./general information
FAX 419/384-3272 - 24 hrs
New-Used-Rebuilt-NOS-Performance British car parts.
We also have used sports cars for sale.
Always 200 - 300 cars for parts in our British-only
salvage yard.
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