Sprags are on direction bearings-meaning they freely rotate one direction and the other direction they lock hard, but the 90's 722.6's have a 9-element(or so), and the +2000 722.6 have like 12 to 14 element(or so).Then the third-generation of the 722.6 has a larger sprag. There are two sprags most people lose the first one(if they lose a sprag), and the physical worst case symptom is the tranny slips to neutral to after third gear..

That raise in RPM is common on the 722.6, and you could need a new regulation spring, and new valvebody shift sleave(s) which I'm assuming it is 2-3 shift, but this may be masked by slipping front sprag too.

Regulating Pressure Control Valve Spring - 68942-01 - Sonnax


This a whole kit for all the shifts valves

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

I think you have a 98 or 99 car. I cannot remember, but you could swap the valvebody on a +2000 car(any engine-even from a Chysler, or jeep) with yours. The transmission computer(TCM) of 98's and 99's should work with no problem..

My 98 S500 has a 2004 W220 S430 100,000mile internals. I did not change frictions, nor did I changed the sprags. I did it to prove the concept, and works fine. I have loged 30,000 miles since I did it, and I have the 2004 valve body in my 98 with a 98 TCM(my TCM has a 97 date code.). All I changed were all the seals from a TransTech $100 kit from R/O/C/K/A/U/T/O. I did put a rebuilt $200 CVC torque converter.

Martin

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Download the atsg manual from post 7