Looked everywhere I could think of on the forum and my manuals, just couldn't find the 722.356 listed ('91 300SE).
Anyone have a modulator pressure chart?
It reads 4.1 Bar, but shifts a bit firm in 3-4. Just want to verify.

Tks,
DG

Ooops! Senior moment. I meant 722.351 tranny.

DG

According to this chart, it's 58 psi.

722.3/4 trans start gear [ 1st/2nd ?]

If you need to replace your modulator, ask for part# 126.270.91.79 at the dealership. It's an updated modulator kit that comes with a new style thrust pin, miniature t-wrench, cap, and o-ring. Installing and setting modulation pressure for the updated modulator is done in exactly the same fashion as the older version.

The reason for the update is unknown, but I feel it's mostly for convenience. The cap, which is now plastic, features a handle for 'fine tuning' after you've set your base modulating pressure. Turning the handle counter-clockwise will subtract up to 3 psi from your base pressure so there's no longer any need to pry off the cap each time when adjusting by shift feel.

We almost never replace modulators. I suppose they could stick and I have actually seen them leak both externally and through the diaphram, but the common issue is just a matter of adjustment.

I hate the modified one with the plastic cap. The adjustment range is about useless and the cap is pretty much destroyed when pried off. The old rubber reusable cap worked just fine and was probably just too easy. I'm relatively sure that is why they changed it, because too many folk were making ill considered adjustments.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician