UNI Renault gearbox

[Steve V8]

Can anybody tell me which Renaults the UNI gearbox fitted to the later S4s and V8's are from, and did Lotus make changes to the internals, gearing, diff ect.

[Barrykearley]

My understanding is they are completely different inside - I may be wrong though.

six speed options with updated internals are available from kit car companies for about 6 large !

[Steve V8]

Surely someone knows which Renault this box is from, the reason I'd like some info, my son have been given 3 early 90s Renaults for scrap from a hoarders back garden.

[Barrykearley]

Fuego or 21 rings a bell

[rocket63]

Renault 25 from recollection

[Steve V8]

22 minutes ago, rocket63 said:

Renault 25 from recollection

Cool, we have a Renault 25 V6 turbo, does anyone know if the internals are the same.? 

34 minutes ago, Barrykearley said:

Fuego or 21 rings a bell

Thanks Barry, where do you find your information 

[Barrykearley]

The internals are different. Bearings, housings, gears and shafts I think....... Sure you could use it for a rebuild thouh

[DanR]

If those boxes are from the UN1 or 369 series do not scrap them. They are all well sought after and can be fitted with stronger gear sets from companies like GTO and Albins in Australia. With those gear sets they're all as strong as each other as proven by the GT40 clones using them.

Those boxes are basically the same except for detail changes like some bearings and gear design. It's therefore important not to mix the parts when rebuilding unless you know what to look for.The smaller R20 engines may have lower initial ratios too. We never got those in oz. The only variation for the majority was the ratio for 5th and the diff ratio. There are also a few (four I think) different rear covers and gear changing mechanisms.

[Steve V8]

20 minutes ago, DanR said:

If those boxes are from the UN1 or 369 series do not scrap them. They are all well sought after and can be fitted with stronger gear sets from companies like GTO and Albins in Australia. With those gear sets they're all as strong as each other as proven by the GT40 clones using them.

Those boxes are basically the same except for detail changes like some bearings and gear design. It's therefore important not to mix the parts when rebuilding unless you know what to look for.The smaller R20 engines may have lower initial ratios too. We never got those in oz. The only variation for the majority was the ratio for 5th and the diff ratio. There are also a few (four I think) different rear covers and gear changing mechanisms.

Thanks Danny,  my son's giving me the boxes to stash away for a rainy day, I've already laid claim to the clutch slave cylinder mount, which has a broken lug on my Esprit. It's always handy to keep these rarities for such things. That's my Christmas pressie sorted. !!!