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MT 75 gearbox output
PaulBuz - 16/10/02 at 06:55 PM

Hi all
I've been reading this site for several months now & its saved me no end of grief!
But the time has come to pick the brains of you lot
simple question-wot do I do with the rubber do-nut thingy?
keep it or loose it.
If I get rid, how do I connect the prop??

Liam - 16/10/02 at 09:56 PM

Hello,

I'm using an MT75 4x4 box so I assume the output on mine is the same as yours - three kind of prongs or fingers for want of a better description. I dont even have a rubber donut cos I bought the box separate. I am planning on simply bolting the flange of a uj to those three prongs - or if the uj flange doesn't allow that (too small for example), I may have to bolt the uj to a plate, then bolt that plate to the prongs on the box. There'll be a sliding joint after the uj too.

Hope thats as clear as it is in my head!

Liam

[Edited on 16/10/02 by Liam]

stephen_gusterson - 16/10/02 at 10:20 PM

i thought about that too, but unless you get it all completly central, it will vibrate like a b$%tard. In top gear the shaft goes faster than the engine.

I bought a prop ready made from a company in the kit mags, 125 quid plus vat. included everthing from the spined bit in the box to the flange at the diff


saved so much hassle

atb

steve

zetec - 17/10/02 at 07:53 AM

Have fitted my prop to MT75 box using an adaptor plate that the prop maker supplied. The way forward is to dump the rubber joint, unscrew the studs on the output shaft, and fit the adaptor plate. The adaptor plate is drilled to accept a standard u/j that the prop maker fits to the prop. Got mine from Dunnel and Fairbank tel. 01132488788.
Haven't tried it yet but went together easy.

Dunc - 17/10/02 at 09:08 AM

Mmmmmm, Donuts, mmmm.

Do away with the donut, get a professional to make up the propshaft. might cost but will save a lot of hassle in the long run.

PaulBuz - 17/10/02 at 05:37 PM

Thanks to all replies above

quote:
Originally posted by stephen_gusterson

i thought about that too, but unless you get it all completly central, it will vibrate like a b$%tard. In top gear the shaft goes faster than the engine.

I bought a prop ready made from a company in the kit mags, 125 quid plus vat. included everthing from the spined bit in the box to the flange at the diff


saved so much hassle

atb

steve


Wot splined bit in the box?I was thought that on the Mt75 box the sliding spline was part of the prop itself

If I go with Liams idea, I'm just a bit worried that by the time i've bolted another u/j onto the 3 pronged output shaft, the amount of unsupported extension will cause vib. probs.
Or do you plan to fit a centre bearing?

Liam - 17/10/02 at 08:15 PM

I think Steve is referring to the output of his Type-9 gearbox. About the unsupported extension - I haven't considered it and am definately not using a centre bearing. But then my rear prop is only 450mm from gearbox output to diff flange. I wouldn't have thought it will be a problem so long as your uj (and adaptor plate if needed) are perfectly concentric to the box output.

Liam

stephen_gusterson - 17/10/02 at 08:53 PM

yep - mine is a type 9 box - should have made that planer. The point I was making tho is that the prop people can supply the whole drive line.


atb

steve