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Old 26-01-2009, 10:06 PM   #1
Mixja
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Default 1.6cvh + 6 speed st170 gearbox...

looking to fit a st170 6 speed box into my series 1 with a 1.6 cvh engine, just wondered if anyone's done this before and what's involved, know a mount has to fab'd but want to know about flywheel/clutch/linkage/starter etc...

any help much appreciated...
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Old 27-01-2009, 01:21 AM   #2
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One of the main problems with fitting a ST170 (MT285) gearbox is that it's 'drive' dimensions are fairly unique and therefore 'special parts' are not too available on this side of the pond.

Standard ST170 parts (flywheel, clutch, starter etc) bolt straight onto a Zetec-E engine with the starter at the upper rear of the block, but......The flywheel is a quite heavy DMF and the clutch plate has a solid (unsprung centre). Operation is a concentric hydraulic cylinder. The splines of the input shaft are a Getrag, not Ford standard. Gear selection is by a dual cable system. The driveshaft splines/seals/inner UJs are also different to BC/IB5/MTX.

Click the image to open in full size.

The most available parts, as I said, have to be sourced from the USA. One thing to note though is that all their flywheels/clutches are 230mm. UK has 2 sizes, 230mm to mid 2003, 240mm after.

I fitted a complete setup onto a Zetec-E in my Focus. For a flywheel I used a s/h alloy Fidenza. Its well known (well I didn't) that alloy flywheels are a bit light resulting in a lot of noise idling in neutral. A steel one is better. The only UK made one is by TTV. However I'm not sure if they ever sorted out a road clutch to fit.

With no 'shock absorber' in the flywheel, its best to have one in the clutch plate. The best source for clutches is the US, which is now quite expensive However, the MT285 was fitted in the Mini Cooper S (BMW) with a 215mm flywheel. Also the Opel/Getrag F28 gearbox has the same input shaft. So with some modification I was able to fit a Calibra Turbo clutch, which works quite well. Looking at Vauxhall specs, it should take the torque of most N/A engines.

The only other thing I can remember at the moment, is I didn't like the pre-load on the selection detents, which I found too heavy. Many people remove the external counter weight to reduce the inertia, but reduces the balance of the selector. I made up a new detent assembly with a lighter preload.

If there are any specific questions/clarification......

Martin

Last edited by pdfbt40; 27-01-2009 at 01:24 AM. Reason: Added picture
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Old 27-01-2009, 10:02 AM   #3
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that's very helpful mate, thank you very much...
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Old 05-08-2010, 08:27 PM   #4
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Hi,

just dragging up an old post... but I'd like to know if someone knows if there's a different between the shiftercables (Ford / mini) as I have fitted a Getrag 6spd in my mk1 Fiesta, but the cables for the shifter are a bit too short. (about 30mm)

I've tried re-routing them, with no success, so ideally need slightly longer cables...

any help appreciated.

Cheers, Martein
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Old 05-08-2010, 08:33 PM   #5
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30mm?? mount the shifter closer
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Old 05-08-2010, 08:50 PM   #6
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not sure if this any help but a standard 1.8 zetec flywheel fits with a vauxhall clutch plate which has same spline as getrag think it was astra gte or something
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Old 05-08-2010, 09:11 PM   #7
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I have a ClutchMasters alloy flywheel and clutch/pressure plate, so that's all sorted.
I still have to get the driveshafts made, but I need to lower the car first, to make correct measurements for the length of them.

Yeah I might have to do that, but the I've mounted the selector on top of the hole in the floor of the old selector... So I'd rather have it to stay there.
It's easier to change the shiftercables instaed...

Now the Fiesta mk1 is a small car, so I wondered how it's done in other conversions...
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Old 05-07-2012, 05:23 AM   #8
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Default ST170 on 1.6 cvh.

Hi, i am fitting one ( ST170 G.Box) in my S2, does the clutch plate fits ok on the mainshaft because the shaft is a bit short as i am seeing. I am trying to use the standard flywheel because i have an alum. one with modified clutchplate to fit Getrag. And what have you done for the powerbrake because it have to be moved due to the gear linkages. Any help appreceated.
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Old 05-07-2012, 05:23 AM
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170, 6speed, alloy, clutches, escort, f28, flywheel, ford, gearbox, manual, noise, opel, speed, st, st170, ttv

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