Does the transmission internal pressure adjusted by the vacuum modulator on the 722.315 rise or lower when the transmission fluid is hot? I adjusted the modualtor pressure with the fluid cool. Just wondering. Hot fluid expands=more pressure? or, Hot fluid less viscous =less pressure?

Great question. Hopefully someone knows

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

The pressure is set with a warm transmission. I think the pressure will be higher when cold due to the ATF being a tad thicker

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I think this true as my 1-2 shift is similar to someone dropping 10 bags of sand in the trunk when cold but softens up when warm.

__________________
1995 E300 Diesel