[DMCForum] Snapping input shafts - an update
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[DMCForum] Snapping input shafts - an update

Hi All

I had an interesting conversation today in my search for a gearbox
specialist who can fix a manual tranny we've removed.

I remembered the kit-car place close to where I grew up, found their
website and gave them a call. I remember reading their site on the use
of the PRV and the UN1 gearbox (identical to the 369 apart from the

To cut a long story short, they have gone through the exact same
problems as DeLorean owners who drop in a big engine and break input
shafts - particularly in GT40 replicas apparently. I need to do some
more investigation, but they have a guy who rebuilds their UN1 boxes
with strengthened input shafts _and_ a limited slip diff.

The GT40 replicas use a "long legged" final drive to give a good top
speed - which bears out what I've been saying about the final drive
being the key. All the performance Renaults using the UN1 or 369 have a
3.8:1 or even 4.1:1, and they never break...

I will find out more in the coming week when they strip our box down.


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