Jackstrath

Hello guys , i think this could be my first topic , although iv been on here for a few years now i just normaly have a lookie at this and that.

Im after some info , what can , who can and best way to do what im thinking , dont like the cant words lol

Long story short , i have a high powered mk1 focus RS track car , only issue just now is gearbox's , i cant seam to get the MTX75 to last any great deal of time.

Now its down to torque , that seams to be the issue , the standard box was rebuilt , lasted 700 miles , quaife box was built , didnt even last a fraction of it.

From what i found , standard box killed bearings really fast (i guess due to the horozontal and rotational forces placed on the bearings)

Quaife dog box , a design flaw on 3rd gear - one which aparently isnt going to change


So as another option iv been looking about to see whats stong as i know works , and it turns out mk2 RS focus's gearboxs seam to be fairly bomb proof with very little reports of failures , and the big powered cars run big torque figues due to them having that 5th cylinder haha


Now external size wise they arnt much bigger , which isnt to bad considering they are a 6 speed aswell (but then we did have the 6 speed in the st170 that fitted no bother)

The lists of parts that arnt a issue:
Driveshafts
Rear dogbone mount
Top engine mount
Gear Cables

The main issue is bell housing, for three reasons ;
1. starter motor is on the other side of the box (on a mk1 its on the rear, mk2 its on the front)
2.Bell hosing shape (this i guess is issue 2 and 3) bolt pattern is wrong
3.Diff
Iv yet to get a messurement , but number 3 might not be a "big" issue , IE if the center of the diff to the center of the imput shaft isnt miles out then it could work

I could be wrong , but i dont think the bellshousing can be sorted with just a bolt adaptor plate like you can on a RWD set up

If it could be them it would just be the starter motor issue and it could work

Iv yet to think if a mk2 RS starter motor woud fit down the front between the turbo/manifold set up (although i highly doubt it would)


Has anyone got any info or ideas , or knows someone that has done this or was atleast thinking about doing it , or would be up for trying to get it to work ?


at a wits end tbh , and this is one last attempt to relight the love with my car ! (currently up for sale)


Thanks in advance !

costina

iTrader: (1)

It would be nice if I could see your other thread.

Hopefully it will be sorted soon.

Jackstrath

costina

iTrader: (1)

Just start another thread and the mods will get around to deleting the old thread.

smiley

Try contacting Norris motorsport they do the mk2 box conv on s2's maybe they can help

Jackstrath

should be it now!

slammedorion

costina

iTrader: (1)

Got to ask why wasn't the getrag 6 speed never used on the RS ?
I know all the dual mass is a pain etc can it not handle power very well?

colins2

I was always led to believe the 6speed form the ST170 could not handle the torque.

Jackstrath

costina

iTrader: (1)

What about changing the ratios that box? With a lsd would it handle the torque?
seen on focusfantics a guy is running 350lbft on a 6speed with no issues so far and thinks with a lsd 400 would be ok.
unless your running more than that......?
imo it would be a cheap option just to have a play with a getrag and see if it lasts.

bassboy

Let us know if you hear anything Something I would be interested in doing the conversion too

slammedorion