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Author: Subject: MT75 conversion to hydraulic clutch
carboy0

posted on 23/3/12 at 10:44 AM Reply With Quote
MT75 conversion to hydraulic clutch

I run a Type 9 gearbox at the moment with an hydraulic concentric clutch slave. the box is on its last legs and I was wondering if I can convert to an MT75 inline box.

Questions;

1. Can I use/modify my hydraulic concentric clutch slave instead of going over to a cable clutch?

2. I read somewhere that the MT75 is 'bigger' than the Type 9, does anyone know how the dimension differ from the Type 9? I'd hate to buy one only to find it won't fit in the transmission tunnel.

Has anyone done this, or have any ideas?

Thanks in advance





Chris
www.marinacoupe.co.uk

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hootsno1

posted on 23/3/12 at 03:00 PM Reply With Quote
The mt75 is bigger by how much I don't know. The mt75 has the clutch fork on the drivers side and sticks out the side of the box you will need a wilwood slave cylinder and make a bracket to bolt it to the side of the engine.





If a little hammer won't fix it get a bigger hammer

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carboy0

posted on 23/3/12 at 03:15 PM Reply With Quote
MT75 Clutch

I want to fit one of the concentric clutches that go like a donut around the input shaft. That's what I have on my Type 9 gearbox at the moment.





Chris
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hootsno1

posted on 23/3/12 at 03:48 PM Reply With Quote
I don't think there is anywhere to bolt your slave cylinder to inside the box the only way I could find on the net was the way I said sorry for the bearer of bad news





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carboy0

posted on 23/3/12 at 03:56 PM Reply With Quote
That's OK better to find out now, before I lay out any money. Could be cheaper just to have the Type 9 rebuilt then.





Chris
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hootsno1

posted on 23/3/12 at 04:02 PM Reply With Quote
This is the part that you will need for the mt 75
http://www.rallydesign.co.uk/product_info.php?products_id=4080
The mt 75 is a stronger box it's the 1st gear that let's it down





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carboy0

posted on 23/3/12 at 05:53 PM Reply With Quote
Thanks for the posting, I have been researching elsewhere and turned up that the 4 cylinder Ford Scorpio (wide mouth frog version) from 1996 used a 2WD MT75 gearbox with an hydraulic clutch. Not sure yet whether it was the piston or concentric type yet, I'll post the answer here when I find out.





Chris
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r1_pete

posted on 23/3/12 at 07:15 PM Reply With Quote
Here's some dims for you

Mt75 dims
Mt75 dims

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big_wasa

posted on 23/3/12 at 07:30 PM Reply With Quote
If you get an Mt75 from the last of the ultima's they allready have hydraulic clutch. Easy to spot. They have a lot less webbing on the bell housing.
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jacko

posted on 23/3/12 at 08:40 PM Reply With Quote
You will need a different prop shaft too
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carboy0

posted on 23/3/12 at 09:33 PM Reply With Quote
Thanks for details of Ultima - I am now on the track of a good unit.





Chris
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big_wasa

posted on 23/3/12 at 09:43 PM Reply With Quote
Gear Box Ford Scorpio 16v 2.3ltr | eBay
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carboy0

posted on 23/3/12 at 10:11 PM Reply With Quote
Already on the case - thanks.





Chris
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Paul Turner

posted on 24/3/12 at 08:37 AM Reply With Quote
Gearbox conversions cost money, sometimes lots, been there, done that. The type 9 is a good gearbox when rebuilt by someone who is aware of their idiosyncrasies and better ratios are available should you want to change first to a more usable ratio, the kit cost me 200. IMHO you would be better off spending your money rebuilding the type 9, done properly you will then have a box that will last you another 100,000 miles. Who can say what condition the MT75 you buy will be in, a rebuild plus the fitting parts will cost loads.
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carboy0

posted on 24/3/12 at 10:18 AM Reply With Quote
Yes that's the real debate isn't it. I run the V6 version and you are right the 4 cylinder fist gear is too low, the V6 is much better.





Chris
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Paul Turner

posted on 24/3/12 at 01:12 PM Reply With Quote
The MT75 ratios are truly horrid compared to the type 9 especially the V6. I use the V6 box with the 200 kit to give it a better 1st gear, my ratios are 2.76:1 1.81:1 1.26:1 1.0:1 and 0.82:1, just right for road use and not bad on the trackday I did either. One of the better mods I have done to the car and since I was having the box rebuilt the only additional cost was the gear kit.
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carboy0

posted on 24/3/12 at 05:07 PM Reply With Quote
R1_pete

I thought that I would return the favour, pic of Type 9 dimensions








Chris
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carboy0

posted on 25/3/12 at 10:45 AM Reply With Quote
I found this data on MT75 gear ratios on a Granada/Scorpio website and linked it with some Type 9 ratio data.

Transmission Ratios



Here's a great article from a 2003 Retro Cars magazine all about Type 9s.

Type 9 Article

[Edited on 25/3/12 by carboy0]

[Edited on 25/3/12 by carboy0]





Chris
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carboy0

posted on 2/4/12 at 08:08 AM Reply With Quote
Question for Paul Turner where did you get your 200 gearset from, sounds like a plan.





Chris
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carboy0

posted on 4/4/12 at 01:56 PM Reply With Quote
Whilst looking at gearboxes, I found this with dims for the BW T5 gearbox to add to the collection




Borg-Warner T5 Dimensions

A = 19.5 inches
B = 7.2 inches
C = 14.5 inches
D = 24.7 inches
Weight = 75 pounds / 34 Kg



[Edited on 4/4/12 by carboy0]





Chris
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Paul Turner

posted on 6/4/12 at 05:26 PM Reply With Quote
quote:
Originally posted by carboy0
Question for Paul Turner where did you get your 200 gearset from, sounds like a plan.


Steve Perks at SP Components. Here is a link, the kit I had is at the bottom of the page. http://www.spcomponents.co.uk/gpage3.html

Steve is a real nice bloke, just be prepared for a long phone call. He will obviously rebuild you box for you as well, quality job on mine, as I said before its a 2.8 and the ratios are superb. Steve supplies Burton but I prefer to buy direct.

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carboy0

posted on 6/4/12 at 05:39 PM Reply With Quote
Thanks Paul - brilliant package - another problem solved!





Chris
www.marinacoupe.co.uk

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