Which gearbox for rover V8 into SIII 88?

Callumb · Mar 23, 2013

griffman said:
Go to Ashcroft transmissions' website - there is much knowledge there - they can supply you a kit for fitting an R380 to a series, and also to a V8, including bellhousing.

The critical thing is to position the gearbox correctly - you mount the engine later!

it will be about 5 inches further forward than the 4 cylinder unit.

Wow some great stuff on that site. I see they do high ratio kits for the series 3 box.. also a strengthened internal gear set for a 380 - be ideal if they made a similar kit for a series 3 box!

Dr_evil · Mar 23, 2013

LT77 isn't much bigger than a series box no idea if they come in short bellhousing though, if not derv box, conversion ring (adds 1 or 2 inches to length) and conversion for spigot shaft is needed if using the derv one for length as no idea on V8 housing size

Callumb · Mar 24, 2013

Dr_evil said:
if not derv box

A derv box..? sorry no idea what one of those is

Dr_evil · Mar 24, 2013

Derv is diesel

Callumb · Mar 24, 2013

Dr_evil said:
Derv is diesel

It runs on diesel?!

so whats different about the derv box? what model box are we talking here?

Dr_evil · Mar 24, 2013

Box will have different sized input hence adaptor plate for V8 if using derv box and adaptor for spigot as different size. V8 crank is 24 internal and spigot is 22.5 outer iirc on derv instead of smaller size on V8 box

This is on lt77 but on all boxes V8 input is slightly skinnier

dominicbeesley · Mar 25, 2013

I'd check with Rover/Roamerdrive but I think you can run their overdrive with quite a hefty engine but they just recommend that you fit the transfer oild cooler (basically a bigger sump with fins on I think). If you've got the poke from your engine I'd recommend 3.54 difss AND a Roverdrive, the split gears are useful (especially for overtaking) but also if you've got the torque and power you can be doing motorways speeds without your ears bleeding

Callumb · Mar 25, 2013

dominicbeesley said:
I'd check with Rover/Roamerdrive but I think you can run their overdrive with quite a hefty engine

Didn't know about this thing.. and I quite like the sound of it!

I'm now seriously considering sticking with the series 3 box & transfer case - rebuild them both completely, get a roamerdrive and ranger rover diffs. And of course a rover v8 (adapter kit for series gbox from rpi).

Dr_evil · Mar 25, 2013

get a miller plate for less, I've had them on my last two and sold both for about £60 so can get one on ebay for about that or less maybe

with S3 you'll have to take it easy, fairy or del torro over drive for those boxes, a good fairey is damned expensive

Callumb · Mar 25, 2013

Dr_evil said:
get a miller plate for less, I've had them on my last two and sold both for about £60 so can get one on ebay for about that or less maybe

What's a miller plate? don't suppose you mean an oil feed plate? although not sure what it would have to do with the roamer drive..

Dr_evil · Mar 25, 2013

Sorry should be Milner not miller but its a box to block adaptor, you'll also need to make a custom spigot bush 22.25 internal and 24 mm outer or do some messing with the crank, will need a machined flywheel as well

Callumb · Mar 25, 2013

If you could still get them I'd be interested. Personally I'd prefer a new kit with all the bits required (as few as possible)... that way you know its all in prefect condition and with no surprises! (probably dreaming)

Dr_evil · Mar 25, 2013

Can still get the milner parts new, think a whole conversion kit is £380 ?

Callumb · Mar 25, 2013

Who sells new milner plates? - my googling fails me (but I'm in NZ so see different results to you)

jai_landrover · Mar 25, 2013

Japanese 4x4 Parts | 4x4 Accessories | 4x4 Spares

jai_landrover · Mar 25, 2013

Does steve parker not do the conversion plates still??

They used to be quite cheap on Ebay from £20-100 ish

Dr_evil · Mar 25, 2013

Not sure if parker does them, I've only had the Philips Milner ones

Did you have a look at your calendar about the winch btw ?

Callumb · Mar 25, 2013

jai_landrover said:
Japanese 4x4 Parts | 4x4 Accessories | 4x4 Spares

Yeah I've already been there but couldn't see specific products listed.. not even mention of Land Rover - I' might send them an email

Callumb · Mar 26, 2013

Got this back from milner 4x4..
"We sold this business a few years ago. Please ring 01246 855520, (Furnival Steel), they will hopefully be able to help you."

Kind Regards
Harriet Halse
Sales/Admin & Advertising
MILNER OFF ROAD LTD

dominicbeesley · Mar 26, 2013

With the Roamerdrive because of its construction you can use it in all gears including low ratio. However, with Fairey (and I think Santana) it's not recommended except 3rd and 4th. Also, they're a bit easier to fix as most of the synchro bits are the same as the gearbox ones and the oil is shared with the transfer box (still not sure if that's a good thing) but it does mean they're better at getting rid of heat which is better for a big engine.

They are f***ing expensive (£1200) but I got great after sales from rockymountain uk when I had trouble with mine (the bearing was knackered - not sure if that was me fitting it wrong or just a bad bearing) after a few misses (trying different backs/fronts etc) Martin sorted me with a new one and its not missed a beat. The Heystee thing will be worth watching as it may compete on price.

I've emailed Heystee to ask about price, availability and strength of their boxes as I'd like an overdrive for my LWB project and not sure what to get...

Which gearbox for rover V8 into SIII 88?

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