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which diff would you expect

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rehab1964

Post subject: which diff would you expect

Posted: Fri Apr 02, 2010 4:45 pm

1275cc

Joined: Mon Jan 01, 2007 11:34 am
Posts: 2425
Location: Hurstbridge n/e Melbourne

I've got a 1275 in the shed which i think was from a 1275LS engine number 12H169 - outputs are pot joints, what diff ration would you expect to be in this?

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi

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drmini in aust

Post subject:

Posted: Fri Apr 02, 2010 4:54 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39764
Location: near Baulkham Hills, NSW

3.44 is my bet. :wink:

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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. :mrgreen:

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VulcanBB18

Post subject:

Posted: Fri Apr 02, 2010 5:00 pm

998cc

Joined: Sat Mar 13, 2010 4:19 pm
Posts: 840
Location: Ridin' the rails somewhere

+1 on the 3.44 :wink:

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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

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rehab1964

Post subject:

Posted: Fri Apr 02, 2010 5:03 pm

1275cc

Joined: Mon Jan 01, 2007 11:34 am
Posts: 2425
Location: Hurstbridge n/e Melbourne

even with the 12" wheels?

would be great if it is, would solve the ms plum problem 3.44 and pot joints ready to go

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Morris 1100

Post subject:

Posted: Fri Apr 02, 2010 5:05 pm

Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124

rehab1964 wrote:

even with the 12" wheels?

would be great if it is, would solve the ms plum problem 3.44 and pot joints ready to go

The 12" tyres fitted to the 1275LS were only about ¼" taller than the 10" tyres fitted to other Minis.

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rehab1964

Post subject:

Posted: Fri Apr 02, 2010 5:09 pm

1275cc

Joined: Mon Jan 01, 2007 11:34 am
Posts: 2425
Location: Hurstbridge n/e Melbourne

of course, I should have remembered that - satan's roller skate is on 12's but has a 10 for a spare

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Monaco

Post subject:

Posted: Fri Apr 02, 2010 6:22 pm

998cc

Joined: Mon Jun 18, 2007 9:00 pm
Posts: 1127
Location: Down South

Both the 1275LS's I owned had 3.44 diff's, 12H could be a late Moke Cali motor too though!

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Morris 1100

Post subject:

Posted: Fri Apr 02, 2010 6:47 pm

Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124

12H can be anything! It is the code after that that says what the motor was fitted to.
The 1275LS had the code 12H902.
The 12H169 was fitted to the Morris 1100S Automatic. :wink:

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drmini in aust

Post subject:

Posted: Fri Apr 02, 2010 6:55 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39764
Location: near Baulkham Hills, NSW

Oops my bad- yes M1100 is right again, 1100S auto, I have a 12H169 doorstop in the corner!

Count the pinion & crownwheel teeth, to be sure, to be sure...

_________________
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. :mrgreen:

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rehab1964

Post subject:

Posted: Fri Apr 02, 2010 7:44 pm

1275cc

Joined: Mon Jan 01, 2007 11:34 am
Posts: 2425
Location: Hurstbridge n/e Melbourne

it's definately on a rod change gearbox, I bought it out of the car, was told it had been in a NMP special............

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drmini in aust

Post subject:

Posted: Fri Apr 02, 2010 8:05 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39764
Location: near Baulkham Hills, NSW

If it's taken out of a sedan it's probably a 3.44. But if it's out of a Moke, most likely it's got a 4.13 or 4.26 in it.

_________________
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. :mrgreen:

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GT mowog

Post subject:

Posted: Fri Apr 02, 2010 8:14 pm

Mods rock!

Joined: Fri Oct 03, 2008 9:02 pm
Posts: 5079

drmini in aust wrote:

If it's taken out of a sedan it's probably a 3.44. But if it's out of a Moke, most likely it's got a 4.13 or 4.26 in it.

Big wheel Mokes only came with 4.26 and a very small few (of the last Oz) came with 4.33 :wink:

But, as the doc suggests, it could be anything (especially since it appears to have been put together by someone other than the factory) so you'd be best to take the end cover off and count teeth....

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drmini in aust

Post subject:

Posted: Fri Apr 02, 2010 8:17 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39764
Location: near Baulkham Hills, NSW

GT mowog wrote:

drmini in aust wrote:

If it's taken out of a sedan it's probably a 3.44. But if it's out of a Moke, most likely it's got a 4.13 or 4.26 in it.

Big wheel Mokes only came with 4.26 and a very small few (of the last Oz) came with 4.33 :wink:

Either of which are useless in a Mini. For road work, anyway. :wink:

_________________
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. :mrgreen:

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