A good machinist can addapt about any transmission to any bell housing, within reason of course, but all in all the practical solution is usually a more simple operation.

A chevy transmission is going to have a different bolt patern and the length of the input shaft is going to be different, (I think longer so an addapter may be a practical solution).

Anyway a Kalli is a big poster here that has managed to put together a nice Mustang in Ireland. His input would be a big help as far as sourcing parts etc.

Oh yea,,,, WELCOME to the forum!!

 

And then what do you do about clutches? Can you find a clutch that will fit the GM spline and bolt to a Ford flywheel?

 

My guess is that a GM disk could be sandwiched between a Ford pressure plate and flywheel without a lot of issues, but there might still need to be a few details to be addressed.....

While it is possible to use a GM box, I have my doubts about there being a kit to make it work..... but wait, I think there is a kit to allow the use of a GM tranny behind a Ford engine for some racing applications, but since Ford gearboxes are so cheap, it will not be economicly practical.

 

Using a GM gearbox is, in my opinion, a step backwards. Ford makes some very strong gearboxes and if you need more there are after-market Ford style transmissions that will take almost any amount of power you can make. It might be cheaper in the long run to install an aftermarket OD unit to your C4.
What rear gear ratio are you running? What kind of fuel system?

 

Ok thank again for all your tips and thank you also to welcome me to the Forum .
To answer some of your question i need to see the owner of the car i'm still only an ambassador i'm not a mustang owner yet .

Well i think that because my grammar and spelling isn't the best i probably make some confusion here .

What they ( i say they because are 2 of them , my friend and his mecchanic , of which i think are too lazy to sit and write themself and be irish there is a stubbornes in the genes too ) have in mind is to put on the car or better say to adapt to the engine a European model " Ford Sierra Conswort "gearbox that in the 80' and early 90' use to race in WRC and some other circuit championship , the car in question use to develop up to 450 HP from a 2 litre turbo engine , now of this car there was a custom model that in basic version had 201 HP.

The story is that they are thinking that if that gearbox can handle 450 HP on the Sierra as well can manage to handle the torque of the V8 , they also know that that same "Ford" gearbox had been put on a Chevy engine that was destinate to propell an AC Cobra kit car , the way they mind is working at the moment is that if a Ford gearbox has be adapted to a chevy engine , should be even easy to adapt it to a Ford engine seeing that are coming from the same big family .

Now what i think personally and what i told them that to buy a built purpose gearbox for the mustang even if needed to be purchase and shipped from the State still cheaper that get on a project like the one they have in mind , to me even with the some amount of the money invested still less of a hassle and save lot of time and therefore money.

I'll have look at all the links and as usually pass over the info .

Plus i'll ask all the detail about the engine and transmission to check also this heavy fuel consumption .

All the best .

 

Based on some quick research that I have done, If the transmission came out of the pre 89 Cosworth 2 wheel drive and the transmission is a manual, the transmission should be a T-5. I have found a few pictures online of the cosworth T5s that came in the sierra and they look like the same tremec/borgwarner units used in the mustangs. You might want to call this guy in england for more information on what your friends plan to do. http://www.gearboxman.co.uk/infot5.html

Again, based on my research, I assume that the T5 in the cosworth is the same T5 that was used in the SVT turbo 4cly mustangs in the 80's which have a smaller diameter input shaft. Which is weaker than the V8 input shaft. You might also want to check the length of the input shaft to see how long it is too. If the input shaft is the same measurements and diameter as an 80s - 93 mustang, all you need is a bell housing to mate the t5 to the V8 ford engine. Then you would have to purchase all the other T5 swap parts to make it work. However, since you said that the T5 was on a cobra kit car with a chevy engine, I am starting to wonder if the input shaft is the same as the V8 mustangs. Unfortunately, the internet doesn't have much information about the T5s that came in the ford Cosworths.

Moderndriveline.com is a good source for information, but they are expensive. I bought my T5 from promotionpowertrain.com and love everything about it.

 

That link is kinda pricey, at least the gearkits. For what they charge for the gearkit, you could buy a complete T5 in the States and have it shipped.

 

Well, I am not suggesting that he purchase from the guy, but use him as a reference since he seems to have a well rounded transmission shop.

 

Thank you so much Stangatic .

Your answer is very helpfull , i'll pass the info over and I'll keep you up to date .

Have nice day

Talk to you soon

 

It sounds like they're expending a great deal of effort and money in order to vastly over complicate a simple problem. Buy a trans you know will work(TKO series from TREMEC for instance), buy the right bellhousing, clutch etc, and assemble it.

Trying to adapt something that's available in the area for a completely different application will(as it always does) end up being far more expensive, complex and problematic than they realize.

Tell them to take a step back and realistically assess what kind of engine they're sticking in the car....THEN look at transmissions that are intended for that application, THEN look at cost etc needed to make it work.