M52 Swap with Getrag 250

[Diavel]

Last year I purchased a poorly done (long story, don't ask ) M52 swapped 318ti with the stock getrag 250 transmission. I've spent lots of money since last July fixing it up. But, after a while I started having issues with the transmission. I was getting locked out of gears, stalling all the time, etc. One of the main issues was I could push the clutch in, but the car would get stuck in neutral when going between gears. It was like trying to slam the shift lever into a brick wall when trying to get it in gear. It just wouldn't go.

So I spent lots of $$$ overhauling and upgrading the transmission (JB Racing Flywheel, M3 Clutch, Z3 Short Shift Kit, Throw Out Bearing, Slave Cylinder, etc, etc.) The throw out bearing was shot. I pretty much did everything related to the trans except the master cylinder. The trans had no metallic in the fluid, or any signs of wear.

When it was all done the car then ran like a scalded cat. Revs fast and free. Then it went into winter storage.

It's been out for about 2 weeks and running fine until now. It just locked me out of gears again! The same stuff that was happening before! So I fiddle with it a bit, pump the clutch, turn the car on and off, roll down a hill a bit, and finally I get her into gear going again with no issues. Like nothing happened. The car doesn't die or anything. Just stuck in neutral. Car ran well all the way to my repair shop.

This is so frustrating. I am thinking now after some research that maybe the shifter linkage is binding up because it might be the wrong one for the M52/ 250G combo. As far as I know, it is still the stock 250g shifter linkage. I have it at my indy currently, so I am going to ask them what linkage I have.

Maybe I need a shifter linkage from the 328i? I just hope there's nothing wrong internally with the trans itself. Trans has 204K miles on it. Motor is an M52B28 that was originally in an automatic donor car (which would be a Getrag 320Z manual) Maybe I need a 320Z shifter linkage for my 250G?

Any ideas guys? Thanks