Hi
What manual gearbox would i need to fit to a discovery V8 3.9 engine?
Is there a preferred type or are there adaptor plates available and whats the chances of getting a box for this engine?
any replies welcome (constructive onbes that is)!!
cheeers Colin

Other than an LT77? Would be interested to see what others use....

is that the old rover v8 motor? if so you can use r380 box, or the lt77
r380 is the strongest/best

which car/van does the lt77 derive from then?
Its a 95 Landrover Discvovery V8 3.9 that it need to marry up to.
It needs to be one without the transfer box so non 4 wheel drive one!

the lt77 comes from the rover sd1 , and many sherpa vans, the r380 comes from landrover 4x4 it can be adapted to 2wd but its costly

so the r380,.. is it just a case of replacing the transfer box with the tail housing from a normal rear wheel drive box?

thats exactly what i thought when i looked into it, but after talking to a gearbox bloke i was told it wasnt that simple! but for x amount of pounds he could do it. sorry i carnt be more exact that that....i used lt77 in the end

Is the engine out of a manual or an automatic.

if manual then you can use the lt77

if Automatic then all you need a new flywheel and a SPIGOT bearing for the crank shaft end.


You can also get bellhousings to fit a ford T5 gearbox or a type9 ( will not last long )

Its not just as easy as whipping off the TX box and plugging on a manual tail shaft, also Landrovers have very long bell housings, better to source an LT77, the early ones were a bit weaker, they updated and called it an LT77s this has a ribbed casing.

LT77 is the distance between mainshaft and layshaft centres, S is for strong, good old BL, R380 is designed to take 380ft/lb torque, its a better box. As above search for leyland vans, and ambulances.

You could always go auto, the last of the racing SD1's used autoboxes!

Regards Mark

Hi thanks for all of the info, thats a great help, i know roughly what i am after now
cheers all

Hello

I sourced everything from crank to prop from Dave Ellis at DJE http://www.djev8.co.uk/
- lightened flywheel, clutch, bellhousing, recon LT77, spigot - the lot, as I was coming off an auto box - ex Range Rover engine. Knowledgable and very helpful and a lovely bloke, but not a very Locost way of doing it.... lots of other RV8 stuff too.

Getting the LT77 into the Viento tunnel and far enough back is a bit of a game - U2U me if you want to discuss !


Best of luck
Simon

I have a LT77 in mine and it does the job, never let me down. Only real criticism would be the ratios which I do not believe can be changed (happy to be corrected).

My set up - 3.9 - LT77 - 3.68 diff - 225/50/15 tyres

gear ratio calculator

1 (3.321) 35.2mph
2 (2.087) 56.1mph
3 (1.396) 83.8mph
4 (1) 117mph
5 (0.792) 147.7mph

As our cars do not weigh as much as a 2ton landrover (hopefully), the first gear in particular is far too short.

If doing this now, I would be looking at the T5 (link to manufacturer website + service manual)

With this gearbox there are kits available to alter the gear ratios.

Regards
Kevin

Whoa!! You need to resize that avatar!