Hi Guys,

I'm changing the gearbox on my mini as it currently has a 3 synchro with a high ratio diff which can be a pain in the butt to drive around in. I've 2 gearboxes, both of which I've checked the gearing of the diffs and both are 3.44. There is no real difference between the two that I can see, one has slightly more worn synchros, but I'd thought I'd check with you boffins and see which box would be better to use, I don't know if one has different ratios to the other or what. Engine is a rebuilt 1100 +20thou mild cam with a 40mm Dellorto mainly used around town but with regular stints on the Hwy at 100-110Kmph

Gearbox #1 - This one looks to have the better synchros...
A/BZ4
BC&M
DAM3220


Gearbox #2
SM
T
22G1832


Thanks guys, look forward to hearing your answers.

Cheers,
Keels.

_________________
-Wasabi
1972 Clubman - Daily Driver
1962 850 - EW1 Powered

1st one according to Mini King book is rodchange with small idler bearing,
2nd one is a more common Oz rodchange, small idler bearing, same ratios as a Mini K etc remote box.

Essentially both boxes are much the same if my books are right.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks for that Doc. Managed to find a bit of info online that pretty much says the same thing. Looks like I'll go the one with less wear

Thanks again.

Cheers,
Keels.

_________________
-Wasabi
1972 Clubman - Daily Driver
1962 850 - EW1 Powered

To check Your ratio's count the teeth on the crown wheel and the pinion
also the teeth on 4th gear cluster and first motion shaft
or look for part number on cluster between 3rd and 4th gear
22G931 std 22G1040 Cooper S

_________________
" A Hundred Years From Now It will not Matter what my Bank Acount Was,
The Sort Of House I Lived in, Or The Kind Of Car I drove ... But The World May Be A Better Place
Because I was Once Important In The Life Of A Child"

When I said `ratios' in my previous post, I meant internal gearset, not the diff ratio.
Most all rodchange boxes here had a 3.444:1 diff,
but a Mini K remote box was 3.765 (early) or 3.647 (most, and also 1098 Clubby).

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

The Reason I suggested Counting The teeth, Is because over the Years
people may have changed the ratios Gear or diff for one reason or another,
it does not hurt to Know exactly what You have

_________________
" A Hundred Years From Now It will not Matter what my Bank Acount Was,
The Sort Of House I Lived in, Or The Kind Of Car I drove ... But The World May Be A Better Place
Because I was Once Important In The Life Of A Child"