when you take the drain plug out of the transmission on a 1984 300DT, approximately how many quarts drains out? I'm trying to figure out
approximately how much to add after pulling the drain plug.

Measure how much comes out. Put a little less in, run the car through the gears, check level and add amount needed.

__________________
too many w123's
84 280 SL 5 speed

Don't forget to drain the T/C!

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

^ Agreed. Then add five quarts, check and add more as necessary.

__________________
83 SD

84 CD