One / Cooper 5spd Midland to 6speed S Getrag Conversion
This is a modification we’ve been talking about for quite some time at 1320, but unfortunately it’s been on that long list of to dos with a whole lot of other stuff!
So it was so nice when a customer aka Richard22b rang up for a gearbox for his One but really liked the idea of fitting a 6spd and an Exedy flywheel / clutch combo.
We have tried breaking our 6speed on the 1320 car for the last 160 runs at the drags strip, without any success, so we knew it made perfect sense to replace a known weak link with a seemingly ‘unbreakable’ one.
The worst part of the job has been deciding whether this post should be under the forum heading Engine & Drivetrain Tuning / Faults and Fixes / MINI One / MINI Cooper
Test driving the car I was surprised how it had been transformed. This is how they should have left the factory – FUN, FUN, FUN! 1st gear is now a little taller so the 1st to 2nd rpm drop had improved. The old One’s 3rd gear has been replaced with 3rd and 4th in the S box so keeping it in the power band. It also cruises very comfortably at a respectable speed in 6th – the car was a joy to drive.
I would like to thank Richard as our first customer for this conversion and Steve Rogers at Exedy for his help with this project.
So if you’re looking for an upgrade or if your gearbox has just given up we can do the conversion for you or supply all the parts for you to do it yourself.
First M45 Cooper S to run a 12 (12.96@105)
On Nitrous 11.16@123 0-100 7.1991 It's not how much you spend but how well you spend it
So does this retain the Midlands case and shafts (ie can retain the same flywheel and clutch etc, and just change the gearset), or did this involve effectively bolting a 6 speed complete box onto the One?
I've already got a nice clutch / flywheel, but I just keep wearing out 2nd gear (just broke my 4th gearbox on the weekend).
1320autos, nice to see you've done the conversion nicely. Question is: Do you know what's involved in fitting a Getrag 5sp to a 2002 (Midlands) Cooper?
I would rather give you an accurate figure, If you can hang on to next week because there's not enough hours in the day at the moment, customers keep wanting to make horsepower
First M45 Cooper S to run a 12 (12.96@105)
On Nitrous 11.16@123 0-100 7.1991 It's not how much you spend but how well you spend it
Still running smoothly. Clutch is becoming slightly easier. Not sure if that's because my left leg is getting bigger or if its just getting easier with use.
Cruising in 6th is very good. It's just a long distance economy gear.
My ONE is tuned and is producing approx 127BHP. But this is with a map plus performance parts eg exhaust,induction
How much did this conversion cost you.
My gearbox is dead, I was going to exchange it with reconditioned one. But now I am considering 6 speed gearbox.
If the costs are similar ofcourse.
Please tell us the prices.
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