I was dark for a while working on a secret part of the project. But, it looks like it's going to work, so I am ready to unveil it. I believe this may be the worlds first 13B-T : ZF S5-42 : Atlas 4 speed drive train!
This is the transmission. It's out of a 1988 F-somethine with the 7.3 diesel. 4.14:1 1st 0.76 OD. Aluminum case with integrated bell housing. I was going to use it on my long forgotten 'Expo' project.
First I had to see if this was even possible. Some plexi glass was used to template the engine and transmission, to make sure I did not have any collisions between mounting holes. With the ZF, the starter moves to the starboard side. Some of the mounting flange on the block and two mounting holes interfere where the new starter needs to go. I decided I could trim the flange on the block, abandon one hole, and I could move down the upper hole on the lower bell housing brace. I decided that was acceptable and to proceed to the next stage.
Plan A was to use the stock flywheel, a 2F clutch disk (with a 10 spline input, like the ZF), and stock 13BT pressure plate. I had a tester 2F clutch disk, but alas, the ZF input is a much larger 10 spline.
Plan B: I had this transmission mounted to a 2005 Cummins 5.9 ISB engine for my expo project. I bought a custom South Bend clutch and flywheel to mount the transmission, as well as a 'Destroked' adapter plate. I took measurements off that, and came up with a plan.
-Use the southbend clutch and flywheel.
-Build an adapter out of 1.25" aluminum plate.
-Build a custom crank adapter to mate the cummins flywheel to the 13BT clutch.
This gets me to a 15" clutch disk, up from the 13" 13BT clutch.
Next problem. It's not possible to buy 1.25" aluminum plate in Calgary. Two places volunteered to 'Bring some in' 2 weeks out for 5-$600. I paid $795 for the destroked adapter, and it's already build for the ZF side. I checked it against the plexiglass, and no conflict between any of the Cummins holes and the 13BT holes!. It will work.
Adapter Plate CR to 7.3L ZF5
shop.destroked.com
Plan C... Since I already owned it, and I have already used the tranny clutch flywheel and starter, I may as well use that adapter plate too! I took it to a machine shop, and had the Cummins side of the shaved off. (My hobby-scale mill is not up to that task).
Then I pieced together the parts for the 13BT side out of 3/8 plate. <Note the 3D printed Crank/Flywheel adapter prototype>