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Morris Minor Chat

smooth case VS> ribcase

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renthouse thomas seher
reidsville, reidsville n.c. 27320, USA   USA
Will a ribcase transmission fit directly on a 948 motor with no modifications. I have been told that a later model backplate must be used in order for it to work. Will the throw-out bearing be the same? Thanks Tom

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0123 Mike D
Biddulp, Staffs, UK   GBR
You can shim to make up the difference in thickness Tom thumbs up

pixelsmithusa Avatar
There are a number of variables. From what car is the ribbed gearbox sourced?

See my Tech notes on the subject here:

http://gerardsgarage.com/Garage/Tech/TO_Bearings/tobearings.htm



Gerard

http://gerardsgarage.com/

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renthouse thomas seher
reidsville, reidsville n.c. 27320, USA   USA
What about the 1098 in the Morris Minor it has a thin back plate (1/8 ) and it has a ribcase.

pixelsmithusa Avatar
Probably not all original. I have seen every sort of incorrect combination, mainly because the stuff will all fit, so it's assumed it's correct. Sometimes you can get away with it, but usually it doesn't work as well as it should.

In reply to # 24369 by renthouse What about the 1098 in the Morris Minor it has a thin back plate (1/8 ) and it has a ribcase.



Gerard

http://gerardsgarage.com/

renthouse thomas seher
reidsville, reidsville n.c. 27320, USA   USA
All the Morris Minors from 1963 ? on have 1098 and ribcase transmissions and All have the rolled at the edge 1/8 back plate. Is That correct! According to Gerards the thick back plate did not arrive till the 1275. To my knowledge no Morris Minor came from the factory with either a 1275 or a thick back plate.

That is where my confusion is- either Morris had a ribcase that differs from the sprite and midgets with the imput shaft being 0.185 longer, or the Morris ribcase is a special animal.

At present my three Morris's have 1275 and ribcases so that is no problem, My friend has a 1959 (948) with a bad transmission and I happen to have a nice ribcase that I am willing to give him I just would like to be aware if theer are going to be problems.

pixelsmithusa Avatar
Where did I state that's a 1275 change? If I did, please point it out, because that's not accurate.

Early 1098s with smooth case had the thin plate but the 1098 with ribbed case, to my knowledge always had the case plate. In fact, there are two different cast plates, one for the 1098 and one for the 1275. The 1275 can be used to retrofit a 1098, but not vise versa. This change occurred in 1962, concurrent with the change to the 1098 engine, both with Morris and Sprites and Midgets around the same time. I can dig out more exact dates if you care.

To the best of my knowledge, there was only one 1275 Morris (prototype) from the factory.

In reply to # 24372 by renthouse All the Morris Minors from 1963 ? on have 1098 and ribcase transmissions and All have the rolled at the edge 1/8 back plate. Is That correct! According to Gerards the thick back plate did not arrive till the 1275. To my knowledge no Morris Minor came from the factory with either a 1275 or a thick back plate.

That is where my confusion is- either Morris had a ribcase that differs from the sprite and midgets with the imput shaft being 0.185 longer, or the Morris ribcase is a special animal.

At present my three Morris's have 1275 and ribcases so that is no problem, My friend has a 1959 (948) with a bad transmission and I happen to have a nice ribcase that I am willing to give him I just would like to be aware if theer are going to be problems.



Gerard

http://gerardsgarage.com/



Edited 3 time(s). Last edit at 2017-06-18 01:36 AM by pixelsmithusa.

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emjay Jim English
Marietta, PA, USA   USA
Gerard, prototype is not quite the right word for the factory built Minor with a 1275. It was a special build for a customer. I remember his first name, Don, but I can't remember his last name. Prototype implies the factory was considering a model upgrade. Why would they consider making a model they wanted to kill more appealing?

pixelsmithusa Avatar
Well, that is what I thought I remembered too, but since I couldn't remember details exactly, and didn't want to spend a lot of time tracking it down, played it safe with bringing it up. I think it was a Traveller though, wasn't it?

In reply to # 24375 by emjay Gerard, prototype is not quite the right word for the factory built Minor with a 1275. It was a special build for a customer. I remember his first name, Don, but I can't remember his last name. Prototype implies the factory was considering a model upgrade. Why would they consider making a model they wanted to kill more appealing?



Gerard

http://gerardsgarage.com/

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emjay Jim English
Marietta, PA, USA   USA
Yes, a traveller and he also convince them to install the more comfortable earlier seats. The chap (American) was a balloon pilot and his flying services lead to the opportunity to have a specially built Minor.

pixelsmithusa Avatar
A cursory review of the several Newell and other Minor books has not revealed details, so I can't remember where I read about it. It's not even mentioned in the "Factory Specials" chapters. I did come across this tidbit, confirming my earlier comments:

The final major upgrades to the Minor were made in 1962. Although the name Minor 1000 was retained, the changes were sufficient for the new model to be given its own ADO development number. A larger version of the existing A-Series engine had been developed in conjunction with cylinder head specialist Harry Weslake for the then new ADO16 Austin/Morris 1100 range. This new engine used a taller block than did the 948 cc unit, with increased bore and stroke bringing total capacity up to 1,098 cc. Although fuel consumption suffered moderately at 38 mpg, the Minor's top speed increased to 77 mph (124 km/h) with noticeable improvements in low-end torque, giving an altogether more responsive drive. The revised engine was teamed to a stronger gearbox fitted with baulk ring synchromesh rather than the old cone-clutch type.

In reply to # 24377 by emjay Yes, a traveller and he also convince them to install the more comfortable earlier seats. The chap (American) was a balloon pilot and his flying services lead to the opportunity to have a specially built Minor.



Gerard

http://gerardsgarage.com/

emjay Jim English
Marietta, PA, USA   USA
Gerard, I didn't hear about the new engine endeavor. Perhaps we are talking about two different vehicles. I'm fairly sure the one I remember was owned by a member of the forum on Yahoo. He was originally from PA and then moved to the West Coast. As I recall he retired from the Morris scene a few years ago now. I've never seen mention of it on any of the British forums and may not even be known by the book writers. I wonder if PommReg knows anything about it. Are you tuned in Chris?

renthouse thomas seher
reidsville, reidsville n.c. 27320, USA   USA
Everyone is talking in circles. Has anyone actually put a ribcase transmission in a Morris minor with a 948 and what did you have to do to make it work correctly.

I am actually surprised at all the tangents that the people on this forum go off on. I would like to have advice from someone who actually has performed this task and quoting snippets for a manual is not what I need. The application is for a Morris Minor, I don't care about MG midgets.

It makes it hard to do a chap a favor.

jeff.ross Jeff Ross
Invercargill, Southland, New Zealand   NZL
I put a ribbed gearbox on a 948. I put 1098 flywheel and clutch in as well but left the thin backing plate. It works perfectly.

0123 Mike D
Biddulp, Staffs, UK   GBR
In reply to # 24382 by renthouse Everyone is talking in circles.
Of course we are Thomas
that's the way "Chat" works thumbs up
Has anyone actually put a ribcase transmission in a Morris minor with a 948 and what did you have to do to make it work correctly.

I am actually surprised at all the tangents that the people on this forum go off on.
I think you'd best try the
Modified Minor Forum smiling smiley

I would like to have advice from someone who actually has performed this task and quoting snippets for a manual is not what I need. The application is for a Morris Minor, I don't care about MG midgets.

It makes it hard to do a chap a favor.

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