Lotus Elan

Lotus 5 speed dimension needed

PostPost by: gjz30075 » Mon Jul 18, 2016 3:47 pm

I'm currently modifying a 4 speed gearbox mount bracket to fit my Lotus 5 speed. Mount should simply
be turned 180 degrees. When bolted up however, I think the gearbox sits too low. I've read that this
mount is a good alternative but it looks like it may not be totally correct.

I'm looking for the dimension of the gearbox shifter 'box' from the frame. Mine measures 1 3/16 inches.

To determine I'm too low, I measured the level of the block (of which I have a picture) with the car
on the ground. The frame is level, at this point.

A 'level' measurement of the block now, with the Lotus 5 speed and turned around 4 speed mount, shows
the block to be slanted too much downward at the rear.

So, if someone could take a measurement as shown in the pic, I'd appreciate it.
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PostPost by: nmauduit » Mon Jul 18, 2016 4:10 pm

The stock 4 speed gearbox bracket with stock gearbox mount is to be used with spacers (about half inch tall) when supporting a 4 speed gearbox : would that be about the amount you need your gearbox up? When I fitted mine, I had a 5 speed bracket I used, so kept the stock 4 speed setup in storage just in case, and did not confront your issue...
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PostPost by: john.p.clegg » Mon Jul 18, 2016 4:26 pm

Just been in the shed to check,and the four speed and five speed mountings are the same height..

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PostPost by: gjz30075 » Mon Jul 18, 2016 4:44 pm

Hmm, interesting, John. Makes sense, because I think the 5 speed tailshaft was cast in such a way
to do away with the spacers.

Anyway, I need about 3/8 inch to get the angle of the drivetrain to where I think its correct. I'll just
shim it unless I can get a dimension like my pic showing the same.

Thanks guys.
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PostPost by: nmauduit » Mon Jul 18, 2016 5:50 pm

previous thread on gearbox brackets and spacers :

lotus-gearbox-f37/gearbox-mount-spacers-t20645.html
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