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Old 27th January 2012, 02:16 PM   #1
mickky3's Avatar
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Inverting Renault Gearbox

Im want to invert the Renault gearbox, for my GT 40, and I understand there is an article that someone wrote about doing the conversion.

I purchased the Back Issue CD from Tony, Ive just spent 2 hours looking through the back issues, but i cannot find the article. Does anyone know which magazine the article was in.

I hope someone can help me...

thanks in advance..

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Old 27th January 2012, 04:38 PM   #2
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Re: Inverting Renault Gearbox

I would imagine it was written by Kevin Farringdon but quite a few years ago. I am sure he will see this post and reply.

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Old 28th January 2012, 07:54 AM   #3
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Re: Inverting Renault Gearbox


Wich gearbox do you use? un1-XX. Let us know the XX value.

Anyway, if your gearbox comes from a renault 25, renault 21, espace V6, it is already in the right position.

If it comes from other donors such as alpine, you need to invert the differential.

If you don't know your donor, the test is simple :

enage first gear on the gearbox. Turn the input shaft clockwise (as per your engine rotation or counter clockwise in case of any boat engine...) and look if the axle shafts turn clockwise or counter clockwise, then you will know if you need to invert the differential or not.

if you need to invert it, you just have to open the gearbox, flip the differential and reclose..very easy to do


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Old 28th January 2012, 09:06 AM   #4
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Re: Inverting Renault Gearbox

Hi Stephane,

I have a Renault UN-103

The reason Im going to invert it, is to get the drive-shaft outputs higher, so I can get the engine/gearbox lower

I know people have inverted the gearbox, by cutting, the bell housing in half, turning it through 180 deg, and then welding the bell housing up.

David Sharp, suggested, using an adaoptor plate between the gearbox, and bell houseing, to invert the gearbox.

Im looking into all options, before I start the conversoin

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Old 28th January 2012, 11:54 AM   #5
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Re: Inverting Renault Gearbox

Kev Farrington from the North West area has an inverted Renault in his car. Send me a PM and will send you his contact details or you can find him in the club members list that members get each year.
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Old 29th September 2016, 10:52 PM   #6
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Re: Inverting Renault Gearbox

I'm also interested in this
Has anyone got pictures?????


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Old 30th September 2016, 02:52 AM   #7
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Re: Inverting Renault Gearbox

Hi ,
find here copy of page from the workshop manual Un gearbox Renault
view of the gearbox from the clutch side. to which the crown wheel should be in normaul use.

also a link to download the entire french version
hope it helps you.
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Inverting Renault Gearbox-scan-bv-un-renault-jpg  
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Old 1st October 2016, 05:56 PM   #8
Kev Farrington
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Re: Inverting Renault Gearbox

Hi guys, I am happy to tell anyone how I did it if you want to contact me. It was a long time ago and it will test my memory.
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