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Transmission (UNI1) rebilding - Gearchange/Gearbox/Clutch - The Lotus Forums #ForTheOwners Jump to content


Transmission (UNI1) rebilding


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I'm going to rebild the transmission my self any advice/ comments ?

This is the first time and I have no expriance but when I read to Service notes

it looks like not so diffcult ??

Any advice e.g check points....

I will repalce bearingd and synchro rings

Thannks

Y.Hotta

:(

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I'd be keen to know myself m8 - Derk Bell aside - has any race prep firms tried to rebuilt the UN-1 with uprated internals for higher power tuning/reliability..?

Has anyone tried to convert it to straight cut gears or a full out dog box..?

It's alive.. alive!!!..

altimeter.gifsai.gif

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"Has anyone tried to convert it to straight cut gears or a full out dog box"

o yes. there is someone else other than the most talked about gearbox person that is the mutts nuts with the UN1 since the late 70's/early 80's

search GTO engineering. get some Williams designed, Quaife manufactured stuff. 6 speed dog box in the four speed case, with reverse in the crappy weak old 5th end. genius.

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Hi Jon,

Don't have a link, but you can reach them at 020 8426 6900

Carl

Red 89SE

Will do - thks Pete

anyone got a linky for GTOengineering..?

It's either this or a certain quafe sequential that a certain someone might be selling...

<{POST_SNAPBACK}>

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I'm going to rebild the transmission my self any advice/ comments ?

This is the first time and I have no expriance  but when I read to  Service notes 

it looks like not so diffcult ??

Any advice e.g check points....

I will repalce  bearingd and synchro rings

Thannks

Y.Hotta

<_<

You can browse all my pics here, might come in handy as they show every gear.

http://www.lotuscolorado.com/vulcangrey/gallery/transmission

P3270145.sized.jpg

Travis

Vulcan Grey 89SE

 

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  • 2 weeks later...

Thanks a lot Travis !!

Nice and good pictures it will help me a lot !

I'm almost fished and I will put back next weekend !

Regards

Y.Hotta

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Hi All,

we do this (from time to time). We replace the gears if necessary use new bearings and also new synchros if necessary. Some gearboxes also get the one-piece shaft and the limited slip differential (ATB-type) from Quaife if the customer likes to have these upgrades.

If you have the workshop manuals and if you know gearboxes its a quite straight forward job. The UN1 is nothing special/exotic. Just keep an eye on the specs and preloads.

Cheers

Marcus

www.PUKesprit.de

I'd be keen to know myself m8 - Derk Bell aside - has any race prep firms tried to rebuilt the UN-1 with uprated internals for higher power tuning/reliability..?

Has anyone tried to convert it to straight cut gears or a full out dog box..?

<{POST_SNAPBACK}>

Marcus

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  • 2 weeks later...

Hi All

Now I finshed rebild it and the last weekend I was working hard to swap out/in gearbox !

Unfortunatlly when I took old gear box out from the car the Cluch Shift was losed, (lost spring pin ???) I have to moved back a lot to free the gearbox !

Y.Hotta

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