Here's my current list of possible solutions, ranked in no particular order
1) TCM, $100, used

2) Valve body:
New sleeve kit, $66,

Sonnax 68942 05K Overlap Control Valve Sleeve Kit Fits 722 6 Mercedes Benz Trans | eBay

Master Overlap Valve Sleeve Kit - 68942-05K - Sonnax

Rebuilt valve body. $399

722.6 OEM Valve Body

3) Modify valve body , negligible cost, seems to be very successful Sprinter modification for RSN, Rumble strip noise, which I'd describe my transmission problem as

https://dieselrepairblog.wordpress.c...on-rsn-repair/

My friend that sold me the car said the problem started out very slowly and then got worse, so I suspect the valve body has leaks, that have continued to allow more and more fluid to bypass, also this seems to be a very well documented problem with the 722.6...


Please keep the forum posted if any of these repairs are tested