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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Mar 2015
Posts: 79
Just Getting Started
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OP
Just Getting Started
Joined: Mar 2015
Posts: 79 |
Can anybody tell me if they know of anyone who can supply more sensible gear ratios for my Mark 2 roadster with the MT 75 gearbox. There seems to be plenty supplying ratios for the Mark 9 gearbox.
Thank you gentlemen
Alan
2009 Roadster 100 'Merlin'
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Joined: Dec 2008
Posts: 22,370 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,370 Likes: 354 |
When I looked into the MT75 gearbox, it turned out to have a selection of ratios (except 4th which is 1:1).
It might also need a replacement laygear witb different ratios.
A transmission specialist should know.
I understand that the MX5 gearbox could be used as a substitute.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Mar 2015
Posts: 79
Just Getting Started
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OP
Just Getting Started
Joined: Mar 2015
Posts: 79 |
Hi Dave
Thanks for the info.
I really want to keep the original box and just get some more sensible ratios if I can
Alan
2009 Roadster 100 'Merlin'
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Joined: Aug 2011
Posts: 898
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2011
Posts: 898 |
I reckon the torque from the roadster is a bit too high for reliability using the MX5 Mk3 5 speed box.
The latest Mk4 MX5 form Mid 2015 gearbox is on it's 4th iteration and still having a few gearbox failures
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![[Linked Image]](https://www.talkmorgan.com/gallery/27/full/42483.jpg)