[deepesoII]

Just rebulit 69 351w xr7 2barrel...havent dialed in vaccums lines (perhaps problem)....but test drove car and have to maunally downshift automatic fmx in order for tranny to shift....why?

 

[dfwcatsclub]

Three basic inputs are used to determine shift: throttle pressure (modulator), kickdown (linkage), and output speed (governor). Vacuum has to be connected to the intake manifold, throttle linkage has to be adjusted, and your speed will matter. I am assuming you are within the normal ****t down speeds so I would focus on linkage and vacuum.

 

[deepesoII]

ok....and thanks for input....only port on 2 barrel is/has been capped off...vaccum advance (?) has many branches......does anyone have various diagrams for 69 351w...brakes do NOT seem to work.....have to pump...plenlty of brake liquid in booster

 

[deepesoII]

ok ....thanks...it was the modulator....one end was off. only thing left are brakes.