zetecbeast

ok guys, I've got an MTX gearbox currently on the motor (well it's removed from the car). Its a non LSD diesel box I believe.

Its not an RS turbo (yet....!) but a mid engine dax kit car..

I have bought an RS Focus box as I was planning to use the Focus RS clutch and the beefier shot peened gears in the box (400-430hp ish).

Got some questions though...!!! got no experience of MTX boxes and hoping for help

- My shifter linkage is a rod linkage at minute and hydraulic clutch slave... RS box uses cable shift, I'm guessing to modify this (as length wont be right) could be a proper nightmare??

- ratios - Ratios on the RS box will be similar but a bit leggier at the top gears ?? Is this a sensible move or will it screw my gearing?


Also, gearbox mounts are totally different, major PITA . Not sure what route to take. Keep standard box no LSD -> Helix paddle clutch OR push on with the RS focus? anyone done this before in rear engined setup

thanks

luke19790_3

Just remove the guts from the frs box and put it in your box.

luke19790_3

I've seen a kitcar with a st170 box and the gear pattern was reversed

zetecbeast

I've been told that not all guts will fit in all MTX casings though....?
Not sure if that is true but a well known zetec builder said it when I asked about clutches.
Also, I can imagine it being quite full on stripping and rebuilding the gearboxes , are there any good places I could take the boxes to get it done??

I dont have any gearbox tools or experience rebuilding them... but would have a go if there is any good threads on it lol

luke19790_3

I'm using a frs clutch in my rs2000 box but you need to space it out a few mill, or you can use a sach frs clutch which fit with no mods.

zetecbeast

Thanks, so sachs FRS clutch will work with focus 2 litre flywheel and my MTX box?

What do others reckon? Is an LSD really worth all this effort?!! I never had traction issues before but the power was half

luke19790_3

Yes I have a std focus flywheel with frs clutch and a rs2000 style box

zetecbeast

what power are you running? do you have major traction issues with no LSD? (not trips but diffs..)

luke19790_3

Mine as a frs lsd fitted.

zetecbeast

How?
Is it a big job?! did you do it yourself

luke19790_3

No the box came with it fitted

zetecbeast

ok thanks. I am going to strip the boxes down later this week and see if I can swap their guts over...!

Hopefully it won't go Pete Tong...
Has anyone here done it?

neilnewboy

iTrader: (1)

There was a thread on here where somebody did the same conversion but the diff tightened too much and he noticed the RS box has a thin metal gasket/spacer? Iirc the fella made this own gasket and this shimmed the diff enought for it to turn freely. I'm only going by memory but I think he was using a connect bellhousing. If I find the thread I post a link....

neilnewboy

iTrader: (1)

http://www.fiestaturbo.com/forums/mo...-vt164866-245/

Post dated Wed the 10th dec

zetecbeast

Cheers mate
I will have a good read through that right now.

zetecbeast

Well the bolt patter on the two bellhouses seems the same, I think I will have a bash at swapping the internals.

If the current one is indeed MTX diesel gearing, if I was to fit the FRS gearing, will it be worse or better for my car?? lol.

As in faster to a lower top speed (short gearing?) or long gearing and more leggy but a higher top speed?


Also, I have measured my flywheel, it is about 280mm diameter, It is the zetex 2 litre one.
Will the sachs Focus RS clutch kit work with this?
thanks

neilnewboy

iTrader: (1)

i no nout about the diesel gearing but the sachs should work find from what ive read

JesseT

I fitted the Focus RS clutch and flywheel together the mk5 Escort Diesel gearbox casing with a silvertop zetec. Very little grinding was actually needed, and I think I changed the type of some bolts for a lower profile if I remember anymore. The Focus RS bellhousing a a little deeper, 6mm perhaps it was, so it would also put the gearbox a little deeper into the left inner wing.

zetecbeast

Thanks for the info mate