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mikeholi
United Kingdom
18 Posts |
 Posted - 26/08/2015 : 15:30:15
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Just started putting back together NA 0626 but unfortunately it has a Morris 8 diff.
If anyone has an N/P diff I would be pleased to have a conversation
Mike Holi |
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george
United Kingdom
863 Posts |
Posted - 26/08/2015 : 22:08:44
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| Don't despair Mike the morris 8 diff unit is strong, steel cased, has a better thrust bearing set up than mmm and is readily available .I have used one in my N but I am using a YA at the moment. If you need any bits for your morris diff I have some bits left over. Geoff |
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Malcolm Eades
United Kingdom
379 Posts |
Posted - 27/08/2015 : 09:19:08
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I agree. When I found that I, too, had a non-standard diff I did a bit of research on what would fit and it turned out that the Morris 8 unit was often sought out as a superior replacement. As long as your ratio is not wildly adrift, I would stick with it.
Malcolm
M Type
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bob
United Kingdom
336 Posts |
Posted - 27/08/2015 : 12:01:41
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| Does the diff to fit an mmm car have to be a series E morris 8 or will any morris 8 fit/work? |
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george
United Kingdom
863 Posts |
Posted - 27/08/2015 : 15:20:21
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| I think that any morris 8 will fit, the two most common ratios are 7/37 or 8/43 both good for MMM. Some morris 8 and minor had alloy cases as in many MMM. Not as strong but identical I think to M and F/L/J. Geoff |
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mikeholi
United Kingdom
18 Posts |
Posted - 27/08/2015 : 17:46:01
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Thank you all for the advice
Will now examine in greater detail the condition of it!
Thanks also Geoff for offer of parts. May well be in touch
Mike Holi |
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George Eagle
United Kingdom
3243 Posts |
Posted - 27/08/2015 : 19:19:09
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I think the ratio for the Morris diffs is 8:37, i.e. stronger than the standard MG 8:43?
George
L2023 |
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Peter Green
United Kingdom
1682 Posts |
Posted - 27/08/2015 : 23:55:39
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The majority of Morris 8 diffs have a ratio of 7/37. This ratio is mid way between the 8/41 and 8/43 MG ratios.
Peter |
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George Eagle
United Kingdom
3243 Posts |
Posted - 28/08/2015 : 09:18:26
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Thanks Peter - I noticed my typo too late to be able to edit it. 
I should have put in 7/37 and have such a crown wheel and pinion to put into my spare diff.
George
L2023 |
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MGuy
Luxembourg
37 Posts |
Posted - 25/09/2015 : 12:42:25
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I've got a steel case diff with a 7/37 CW&P in my NB too. Unfortunately, some of the heads of the crown-wheel-bolts broke off and destroyed some teeth. I tried a 8/43, but the diameter of the crown-wheel is to big, the maximum is 160 mm. Any idea were to get a pair of 7/37 CW&P for a 2-star carrier (6 bolts)? Thank you for any help!
President of the M.G. Car Club Luxembourg / secretary of the Cercle MMM |
Edited by - MGuy on 25/09/2015 12:44:08 |
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Richard Hardy
United Kingdom
2165 Posts |
Posted - 26/09/2015 : 13:26:03
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You do have to file out the banjo a little to get the Morris crown wheel in but it will work a treat and the CW&P is more substantial i.e. heavier duty than the MMM CW, so has its advantages
Rich
Vintage MG Parts |
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george
United Kingdom
863 Posts |
Posted - 26/09/2015 : 16:04:53
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| Rich ,I think the difficulty that Guy refers to is getting a modern replacement crown wheel into a morris 8 diff carrier. It can be done but is not really satisfactory as a bit of butchery is needed. Guy I have sent you an Email via the forum .Geoff |
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Richard Hardy
United Kingdom
2165 Posts |
Posted - 27/09/2015 : 20:32:17
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Yep, easier to just replace the whole unit and a lot quicker / cheaper too!
Rich
Vintage MG Parts |
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MGuy
Luxembourg
37 Posts |
Posted - 05/10/2015 : 12:43:26
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The problem is not only the bigger diameter of the crown wheel (6"1/2 instead of 6"1/4), but also the higher teeth on the pinion. This means the pinion has to go deeper into the neck of the housing. Of course, the sleeves to hold the rear bearing have to be moved more to the front than, etc...
President of the M.G. Car Club Luxembourg / secretary of the Cercle MMM |
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