Hi guys and girls...

I've had a Pinto in my MK Indy for the last couple of years now and need a bit more power! I've almost finished building/tuning a 1987 YB Cosworth engine to stage 2 level of tuning (approx 320bhp).

However, I'm trying to decide whether to fit a type 9 gearbox or a type 5. Does anyone know if a Type 5 gearbox will fit in to the transmission tunnel of the standard MK Indy? Has anybody out there done it?! I would prefer to fit a Type 5 as they seem to be a bit stronger than the type 9.

Be interested to hear from you.

Thanks,

Graham.

Some info on various ford boxes here: http://www.burtonpower.com/tuning-guides.html

It seems the type 5 is a v6 gearbox, not cossie, however I would assume (like the type9) its just the bellhousing that is different.
So if you just want a 4 speed box, i would expect the type 5 to bolt up the same as a type 9)

Thanks for the reply...

Sorry I should have explained myself a bit better.

I'm actually talking about the Borg Warner T5 one that is fitted to the YB Cosworth engines, not the other Capri Type 5.

[Edited on 10/10/11 by GH1985]

MT75 fits and is quite chunky, you could use one of those...

T5 is strong and has superior ratios to the MT75 and the Type 9.
The type 9 would not cope with 320 bhp for long.
The MT75 would be better but the ratios are pants.
I would do all I can to fit the T5.

hi, you cannot fit a type 9 to a yb without a special flywheel and it wouldnt last 5mins if you did the only box to use is the bw t5 as for fitting the indy chassis im not sure but when i put one in my mk2 escort it meant a whole new tunnel.
dont forget you will need to upgrade the diff/prop and brakes too.
Ray

I would say do it anyway.

compared with the cost of building/buying the engine and box, the cost of moving a couple of tubes on the chassis to accommodate the gearbox will be trivial even if you have to pay someone else to do it.

cheers

Mark

OH yes definately agree

Thanks for the replies everyone... some useful info there.

Rang MK today and they didn't really know whether a T5 Borg Warner would fit the MK Indy.

Going to measure up a T5 tomorrow, but think it will be too big.

Interested about the MT75 option. Anyone know the kind of power rating??

To be honest... I would rather pay for uprated gearbox internals than have to cutout, weld and powdercoat chassis members. Removing the floor and refitting would be a horrible task! I've had it on the road for 2 years, so I don't really want to have to rebuild the whole car.

I have searched around and there seems to be many different views on type 9 gearboxes in type 7's with high power applications. Half of the people say that the type 9 won't last and the other half say that the light weight vehicle is no problem for the gearbox.

Any thoughts people?

Guessing it all comes down to:

- Quality/age of gearbox when fitting.
- Driving style.
- Getting the tyres to grip and actually transfering power to the ground - guessing the tyres slip before any damage is done to the gearbox.

I would be interested to hear of examples of type 9's either working fine with high power (or failing) to try and establish what is likely to happen if I mate it up to a 320bhp Cossiw lump.

I've got a spare type 9 box so thinking I might fit that and see how it copes. If it fails, I will then have to invest in some expensive Quaife parts!

Thanks G.

MT 75 fits, only adjustment is the box lever. (mind you, there are more types of MT75)


Description

I used a 2,3 duratec cosworth


Description


Description

and a 3,38 diff.

no issues sofar..

[Edited on 12/10/11 by major]

as RAYLEE29 says they flywheel on the YB is bigger and won't fit the MT75 or type 9, throw in the ratio and strength issues and the only sensible option is the T5 (even if it means a wee tweak here and there to make it fit)

A custom flywheel could cost you as much as £200 and it needs to be balanced onto the crank (another £50) all so that you can connect it to a g/box that could go bang at any time - even the strongest modified type 9's I know of are only rated up to ~280bhp and they cost £1500+ (although the lower weight of a se7en my save the g/box a bit…..)

but I was under the impression that the T5 was more or less the same size as a the type 9 - I don't have the actual sizes though




Type 9 (4cyl / short input shaft version)


MT75


T5
( anyone got a drawing ?? )




.

[Edited on 12/10/2011 by mcerd1]

For what it's worth, I had no chance of fitting an MT75 into my transmission tunnel but a T5 ended up going in with only minor modifications. That's in a Tiger Super Six though.

Not measured them, but I've had both boxes sat in my garage and I don't recall there being a huge difference in size between the T5 and Type 9.

Thanks for everyones responses...

I met up with a guy from one of the Ford forums earlier today to measure his spare type 5 gearbox.

Ended up buying it from him for a reasonable price (it whines in all gears, so assume a bearing has gone)?

However I got it home and thought I would do a bit of research in to the serial number.

The serial number is 13-52-174

I had a check on this website: http://www.britishv8.org/Articles/Borg-Warner-T5-ID-Tags.htm

It turns out that the gearbox is what is known as a 'world class' one... further more it looks like it is the only world class Sierra Cosworth gearbox listed on the website above.

Is this a 'famous' gearbox?? Why is it listed on the website? Anyone shed any light?

Oh, and no, I don't know if it fits yet!!

As far as I know all Sierra Cossie T5 boxes are "world class", this is also indicated on the list you found (search for "sierra" and the other boxes listed are also designated "WC".

I don't think there's much of a difference to be honest, I think it was a case of an uprated thrust bearing and another minor change.

At the end of the day it's still a 20 yr old gearbox that's probably had a hard life being thrashed in a sierra! Mine makes all sorts of awful noises but still works OK - they are pretty damn strong 'boxes!

u2u me your e-mail address and I'll send you loads of stuff on the cossie & T5....

Must admit good friend of mine has a full group A spec RS500 sierra cosworth with over 500hp + a nitrous kit! with a quaife lock up diff and slicks and he still runs a standard Borg Warner T5 box and really abuses it doing track days, drag racing ect ect and no probs what so ever, pretty impressive really for standard kit so if you can make it fit do so it will save you time and money in the long run in my opinion, and will be under considerably less stress in a 7 due to weight so you can have as much fun as you like then !

Cool. Thanks for the advice.

If it doesn't fit, my understanding is that an MT75 is between the size of a type 9 and a BW type 5, so maybe that wll fit.

What kind of power do these manage to cope with??

I fitted a quaife 60g but had to use portapower and cut /reweld on tunnell also fitted a mt75 in an older car. This box will take 350 +