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Modified Minors

Morris Minor 1100 gearbox

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Wee MG 1963 Avatar
Wee MG 1963 Gold Member Thomas W
Crystal Lake, Flat, boring Midwest, USA   USA
1957 Morris Minor 1000 "Sadie"
1973 MG Midget MkIII "Sunflower"
Thanks for clarifying, Mike - in modern US vernacular it means you got your phone numbers mixed up and a truck just won't do for your situation.

Hence my confusion.

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Wee MG 1963 Avatar
Wee MG 1963 Gold Member Thomas W
Crystal Lake, Flat, boring Midwest, USA   USA
1957 Morris Minor 1000 "Sadie"
1973 MG Midget MkIII "Sunflower"
Thanks, Jim - with only me in Sadie, I almost always start off in 2nd, unless I happened to be stopped for a signal on a hill. I find 1st gear only takes me to about 10 MPH on flat ground, and starting off from a light and having to let off and shift again, usually means some Yukon-driving soccer mom is very nearly in my boot. Especially since I am determined to make my sychros last forever, so I am either double-de-clutching, or shifting very slowly - or both.

emjay Jim English
Marietta, PA, USA   USA
Those smooth cases can be pretty tough. My other 948 is a 59 saloon and I got it with around 37000 miles. I did most of my learning on this one. The engine was blowing out a smoke screen and was filled with STP, so the car wasn't exactly babied. I had another 948 ready to install and during one of the ins and outs of the power unit, I pull the box out the bottom and when I was offering it up again, I noticed it would get stuck in two gears when the box was on an incline. Continued with the reinstall and also forgot to put oil in it for a few hundred miles maybe. Then at about 47000 miles I did a full rebuild and the box received a new layshaft and bearings and the missing dedents were installed. It is an extremely quiet box but the snychros can be easily beaten and I've crashed first many times, but it is still very quiet. Some just have better DNA than others. I tend to use the third snychro to slow the innards when selecting first rather than second since it's not as worn. The worst problem is going from a modern manual to the Minor. You have to pay a lot more attention when shifting.

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0123 Mike D
Biddulph, Staffs, UK   GBR
My pleasure Jim

smiling smiley

BenS Avatar
BenS Ben Summers
Sydney, NSW, Australia   AUS
Did I pay a hefty price? In more ways then one! The 1100 gearbox won't fit in my Series II without a lot of work.

That's the verdict of my specialist Morris mechanic and his friend, and I trust them.



Edited 1 time(s). Last edit at 2018-04-01 02:38 AM by BenS.

0123 Mike D
Biddulph, Staffs, UK   GBR
tjt77 timothy Trevithick
Grass Valley, CA, USA   USA
the above link and article should be very useful for those seeking more knowledge on the BMC A series gearbox .. the statement about 'different ratios' effecting performance is guff though.( primarily determine by overall gearing by the diff ratio..4.8 on 803 cc cars.. 4.55 on 948 and LCVs.. and 4.2 on the 1098 introduced late '61 for the '62 model year .. they have same gear ratios with exception to those fitted to later sprites and midgets ( who's engine numbers have 'Da' after the 1098cc cars were introduced.. indicating 'close ratio gearset'..the mini cooper uses same gears ) which actually have much more useable ratios than the standard austin/morris box.. fortunately in my part of the world sprite/midgets far outnumber morris minors.. and 1275cc engines are far more common than 948 or 1098 engines..
One thing that a perspective buyer should always do with an 'unknown' gearbox of to remove off the side cover in order to inspect the gears BEFORE purchase. removal of the dished drain plug will also reveal and inform of condition regarding synchro cone wear ( if full of a bronzy/grey paste...which is decomposed synchro rings.. there is likely a weak 2nd or 3rd gear synchro hub) takes less than 1 minute with a battery powered impact wrench to remove the 7/16" head screws that hold cover in place ..or 2- 3 minutes with standard 7/16" socket and ratchet. you also need good torch( flashlight) to look into the area where the first gear resides at rear of inner casing ( its hard to see and partially shrouded by the selector ) and then turn the box by front or rear shaft and carefully look at each of the gear teeth as you turn the shaft.. a few minor chips on the very outside edge dousn't tend to cause major problems ..but if there is chipping accross more than 1/2 the width of any teeth , Ist gear will make and audible noise and possibly jump out of 1st gear to boot.. you can also be assured that if the 1st gear is damaged.. the laygear, with which it meshes, will also be comprimised, and the cost of a replacement laygear and first gear combined will exceed the cost of a decent used gearbox..

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MM1955 Avatar
MM1955 Ben Summers
Sydney, NSW, Australia   AUS
1955 Morris Minor "Alfred"
1955 Morris Minor "Alfred"
No Mike, I didn't. In future, I will be much more careful. This has been a very sharp and expensive learning curve, and on the way I have made mistakes (the type made by a learner) which I hope never to repeat!

Ben

0123 Mike D
Biddulph, Staffs, UK   GBR
I'm still making "Learner mistakes" Ben smiling smiley
Loads on 'em sad smiley
Trouble is they keep changing the rules smiling smiley

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easydiver Mike Adams
Bear, DE, USA   USA
The trouble with a learning experience is you get the experience before you get the learning.

0123 Mike D
Biddulph, Staffs, UK   GBR
Only 1 in 2 learning experiences are below average

Wee MG 1963 Avatar
Wee MG 1963 Gold Member Thomas W
Crystal Lake, Flat, boring Midwest, USA   USA
1957 Morris Minor 1000 "Sadie"
1973 MG Midget MkIII "Sunflower"
50% gets you Valedictorian in the Chicago Public School system...

0123 Mike D
Biddulph, Staffs, UK   GBR
They obviously don't moderate

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