Tranny bolt pattern, front and rear

Post by: **jabingb** » Tue Jan 09, 2024 6:55 pm

Surely someone has this info, both front/bell housing and rear tranny tail shaft housing? Thx!

Post by: **JonB** » Tue Jan 09, 2024 7:54 pm

Not sure I understand the question…

Post by: **jabingb** » Wed Jan 10, 2024 12:05 am

Need the x, y dimension from the center bore of the front and back of the main case attaching fasteners

Post by: **Hawksfield** » Wed Jan 10, 2024 11:20 am

Hi ??

Post by: **Craven** » Wed Jan 10, 2024 12:34 pm

Start buying yourself a front and back gaskets. Are you asking for engineering drawings!

Post by: **gjz30075** » Wed Jan 10, 2024 2:13 pm

Jerry, I have a few empty cases laying around. I'll lightly paint the front and rear surfaces and
place the painted surfaces on some brown wrapping paper to get a template, of sorts. I can mail
it out to you. Will that work?

Post by: **jabingb** » Wed Jan 10, 2024 2:29 pm

gjz30075 wrote:Jerry, I have a few empty cases laying around. I'll lightly paint the front and rear surfaces and
place the painted surfaces on some brown wrapping paper to get a template, of sorts. I can mail
it out to you. Will that work?

Greg, thanks for the offer but I worked as a CNC programmer/machinist for 15 years and fear that made me too anal, plus I've got a little hobby Tormach that I use. I'll reach out to a supplier of alloy repros and beg them for the data. Thought there'd be that kind of cat here on the forum. Jerry

Post by: **Chuck Nukem** » Wed Jan 10, 2024 4:37 pm

Hi Jerry,

I am working on a several Lotus gearbox projects for the Elan, Eclat, & Europa, maybe I can help you. I am fitting a T5 to a twin cam, and to a Zetec ST170 for the purpose of putting it in a different Elan. I have a 3d scan of the original transmission, but I will have to do another scan of the rear of the bellhousing to get the bolt locations at the rear. I also have a few machines so I might just be that kind of cat

I am also doing a bellhousing for T5 to Lotus 907 for the Eclat, and a Zetec ST170 to Renault transaxle in a way that keeps the starter in the original zetec position.

Post by: **jabingb** » Wed Jan 10, 2024 4:46 pm

Chuck Nukem wrote:Hi Jerry,

I am working on a several Lotus gearbox projects for the Elan, Eclat, & Europa, maybe I can help you. I am fitting a T5 to a twin cam, and to a Zetec ST170 for the purpose of putting it in a different Elan. I have a 3d scan of the original transmission, but I will have to do another scan of the rear of the bellhousing to get the bolt locations at the rear. I also have a few machines so I might just be that kind of cat

I am also doing a bellhousing for T5 to Lotus 907 for the Eclat, and a Zetec ST170 to Renault transaxle in a way that keeps the starter in the original zetec position.

Chuck, you certainly are into it, yikes!

I just find it hard to believe I can't get these dimensions from one of the aftermarket alloy vendors/manufacturers, let alone some Ford archive, it's not a nuclear code

Post by: **Chuck Nukem** » Wed Jan 10, 2024 4:53 pm

Yeah a lot of that information is seemingly not "out there" or if it is it is difficult to come by. What are you plans for the gearbox & tail shaft? Are you doing a swap?

Post by: **jabingb** » Wed Jan 10, 2024 5:35 pm

Chuck Nukem wrote:Yeah a lot of that information is seemingly not "out there" or if it is it is difficult to come by. What are you plans for the gearbox & tail shaft? Are you doing a swap?

Sacrilegious, I'm going electric

Post by: **Chuck Nukem** » Wed Jan 10, 2024 6:02 pm

Heretic!

It will take me a little while (I have to borrow the scanner from a friend) but I will try to get the info off the rest of the box.

Post by: **jabingb** » Wed Jan 10, 2024 7:09 pm

Chuck Nukem wrote:Heretic!

It will take me a little while (I have to borrow the scanner from a friend) but I will try to get the info off the rest of the box.

Chuck, appreciate the offer but I'm determined to get machining dimensions to satisfy my CNC/anal compulsion, thx.

Post by: **Chuck Nukem** » Wed Jan 10, 2024 7:42 pm

A good coaxial indicator will do the trick for you!

Here are some pics of the projects at the moment. The casting I did for the Europa needs some bugs worked out. I had an issue with the plastic not fully burning out on the first piece so I used it as a set up piece to check my holes and alignment. So far so good! I decided to do a lost PLA casting because I really wanted to experiment with the method and see what was possible for a one off casting. The Europa bellhousing has little lugs on the trans side for the suspension mounts which make a sand cast more difficult because they form an undercut. I went to the trouble because I didn't want to cut the starter mount and reweld it to a more appropriate position for the zetec.

In the complete opposite approach the T5 to 907 is my attempt at something a little more fast and loose. I cut the back off a Jensen Healey BH and will machine an adapter plate for the T5 that gets welded on. I will machine the finished dimensions in after the part cools off

The Eclat wants the tailhousing shifter location moved about 2" closer than the standard mustang position. We will see how that all turns out....