Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing MT 75 gearbox ratios

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

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.

Hi Dave

Thanks for the info.
I really want to keep the original box and just get some more sensible ratios if I can

You may well find that this kit will work - i suspect if you call Quaife they will let you know if it will fit in an MT75 2 wheel drive box.

Ratio’s are:

1st 2nd 3rd 4th 5th

3.608 2.046 1.373 1.000 0.828 Gp N

3.075 2.063 1.418 1.000 0.825 ‘Recce’

https://shop.quaife.co.uk/ford-escort-cosworth-4wd-mt75-5-speed-group-n-synchromesh-quaife-gearkit

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