G’day Gavin,
Thanks for clearing that up, I’ve never saw a 336 linkage in motion myself and you verified my suspicions. I’ll get on the aft plate first , I may have to sleeve that piece. The bolt that holds it on is tight but the piece is loose .
The other rod , that supposed to stay vertical does rotate a bit in the plate, two new rubber gaskets there so tightening that bolt doesn’t do much. I have noticed other members on Facebook have beefed up that rod and added additional support plates. 🤔
Dave
Where to start?
First...I'm going to assume that all the heims/rod ends are fresh.
Second...make sure that you have a short spacer at the BOTTOM of the heim on the actuator adapter (see photo) otherwise the joint will bind, and you'll never get a 'solid feel' because the joint will be busy threading itself in and out as you move it. (Part 16 on page FG...everyone forgets it...and I've never seen it on cars I've worked on...until I put one on there...see the photo)
Third...resist the urge to somehow 'solidify' the location link on the top of the case (part #11 on page FG). New top-hat grommets and heim work here. Trust me.
Fourth...the actuator (part 18 on page FG) mounting sleeve gets honked out and floppy after *mumble mumble* years. PLEASE resist the urge to drill a cross-hole in the internal tranny rod (I've seen that...not pretty) to somehow tighten it up. You really really don't want to have to disassemble the rear case to replace that piece, if you can find it. Somehow, what has to be done is eliminate the 'slop' between the through-bolt and the mechanism and actuator, and size the ID of the actuator to be more closely fit to the OD of the cross-rod from the tranny. Whether that means machining a brass sleeve for the tranny rod or somehow putting in a thin shim (we're talking thousandths here, but multiply that by the slop all the way to the front...and you can see where it might be an issue in reality)
Assuming the location link sets the left-right of the stick in the cockpit as described in the manual, the spacing of the parallel arms at the front of the engine to transfer the motion are correct, the bushings at the bottom of the shift lever are not perished (and the tang arms are parallel...what a mickey-mouse arrangement!) then all the slop you may have at that back end is where you're going to find the best return on getting the shift to work, since that's where the most complex part of the mechanism (turning what is, in essence lateral movement of the shift into rotational movement of the actuator on one plane and the opposite on the other) is.
Just some thoughts...it will never be Elan-precise (neither is the TC, if I'm honest...), but you can get it pretty close.
OH, yeah, that ring clamp you see on the actuator? A PO somewhere along the line put 1/2" long slits in the side of the actuator tube about 1/4" outside of the holes for the cross-bolt, and used that clamp to close up the tube so it didn't wiggle on the actuator rod. Seemed to work, but never saw another clamp like that again.
HTH