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fwd gearbox conversion
elise - 27/1/07 at 11:19 AM

best way to alter a ford bell housing to fit a k series without adpter plate and bell is part of the g/box caseing please ??
front wheel drive


MikeRJ - 27/1/07 at 11:46 AM

If the bellhousing is part of the gearbox casting (MT75?) then you have only two options that I can see.

1) Make an adapter plate.
2) Remove the the bellhousing from the gearbox (i.e. cut it off) and modify the gearbox to accept a different bellhousing that fits the engine. Obviously this is going to involve quite a lot of work.

I guess it might be possible to partially remove the front of the bellhousing and then cut a section out of a FWD K series gearbox and have it TIG welded on, but whether you could achieve the accuracy required I don't know.


Hammerhead - 27/1/07 at 12:16 PM

I think this is possible. I am considering altering the rover pg1 gearbox to mate to a type 9. I have photographed the work I have done so far ubt it is not yet on my website.

An issue you have to consider is which engine you have. I have a 1.8 which has a larger flywheel to the 1.4 and 1.6. Caterhan used the 1.6 (i think) which means the flywheel fits easily into the aluminium bellhousing produced by caterham. I have one of these bellhousings and recently got hold of a caterham flywheel and clutch cover.

If you have a 1.6 you will need a 195mm clutch from a ford escort. If you have a 1.8 and want to convert the pg1 gearbox casing you will need a 215mm clutch.

I think you can add a 10mm plate of ally to the pg1 gearbox casing to get the spacing you need.

If you explain what you are doing in more detail I might be able to assist. As I said I have already cut up a pg1 gearbox and modified it so it should fit a type 9. I have also gathered all the parts needed to do the standard caterham conversion so I might just do that instead now.

Let me know if you need any more info.

I think Robin Hood used to do a adaptor plate for the MT75 gearbox to K series.

[Edited on 27/1/07 by Hammerhead]


davidwag - 27/1/07 at 02:46 PM

May be easier to use the rover FWD gearbox

Davidwag


Johnmor - 27/1/07 at 02:49 PM

I used a front wheel drive gearbox bell housing and made an adapter plate to mate it to a ford type 9.

Alfa 164 box and V6 engine.
Wasn't too bad, I cut the plate from 25mm aluminium and had it machined to suit gearbox.





Hammerhead - 27/1/07 at 03:24 PM

yeah johnmor thats what I'm attempting with my rover gearbox. Where did you get your 25mm peice of ally from? I am using 10mm, do you think it's too thin?


Johnmor - 27/1/07 at 05:56 PM

I bought a piece of 300x1200 25mm aluminium from Aalco.

Cant remember exact price, i think it was around £40.
I first made template out of 25mm MDF and used a router to machine it to see if it all worked, bolted together and tried the clutch. when i was happy i cut the outside shape using a Jig saw and lot of parafin.

I then gave it to a mate who machined the aluminium to suit, also had to slightly modify the thrust bearing and make a spigot bearing from phospher bronze.

so far so good.