OK Mini anoraks, I know a Mini K box is supposed to have a 3.765:1 diff in it, the Mini K parts book says so.
However..

I have just stripped one from a 1 owner Mini K, and it's a 3.647:1 (17/62).
Over the years I would have stripped about a dozen 4 synchro remote shift boxes, I have never ever found one to have a 3.765 diff in. Sure, some would have been from 1098 Clubbies, but not all.

Surely the parts books can't be wrong...??

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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.

yep i`ve seen 3.7`s , 3.6`s & 3.4`s in Mini-K boxes

but yes more 3.7`s & 3.6`s & not that many 3.4`s i must admit,,, but still

it`s a bit like take your shovel

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Doc,

My Mini K parts book (PUB 1038) shows 2 crown wheel part numbers on page F4 - 22A401 (64) and 22G940 (62). I assume that means there was an option.

Both the Mini K sedan and van sales brochures only list the 3.65 (17/62) diff.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Thanks for that- you are right, I just couldn't find it before. It's buried in the pic on that page, is not listed in the parts list like the pinion is.

The Leyland Black book lists Mini 1100 saloon and van [early models] as 3.765, Mini 1100 saloon and van [late models] Clubman as 3.650.
I and some others here took this to mean the Mini K was early, and Clubman 1098 was late, as no change points are shown.

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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.

All the 4-sync boxes I've stripped had 3.65s in them - but they were all late K / Early clubby boxes.

Wasn't the 1100 van & saloon the "povo pack"? I imagine they would have got the 3.76?

3.65s are awesome in an 1100 S

cheers,

Jacob

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'72 Clubman Van - 1022cc, 295 head, 731 cam - Daily Driver
'69 Morris 1100 S - Dinged by a bus, in shed under repair
'64 Morris 1100 - Early 1100, long term project