Transmission Line Presure

[Blue Bowtie]

Originally Posted by happydog500

I think mine had a hose coming off it, then a black piece. The guy at the trans shop took it off, then blew into it. It was clogged. He said it was not a big deal. When I got home, I took it off and blew it out.

Chris.

I hope the opposite end of the line was removed from the modulator when the tech blew through it.

The pressure test port is on top of the trans just rearward and slightly right of the case vent fitting. Remove the plug and connect a 350 PSI test gauge to the port. With the engine running at about 1200-1300 RPM and NO vacuum applied to the modulator the pressure should be 250-320 PSIG in Park, Rev, and N ranges and about 160-210 PSIG in all other ranges.

At the same engine speed and with normal idle vacuum of 18" Hg applied to the modulator the pressure should be 75-100 PSIG in all ranges except L1. In L1 the pressure should be about 155-175 PSIG with 18" vacuum applied.

[happydog500]

The piece he took off he blew through with his mouth.