Hello, i had picked up a good working 4 speed 6ish years ago and finally have everything set up and the engine is running, however The transmission won’t shift into any forward gears, it goes into reverse easy, I removed the shifter linkage put the pin in to line it up checked it against the transmission arms and they are all lined up correctly. The arms on the trans separate of the shifter can’t be moved on their own except the reverse shift arm. Anyone have an idea on what could be the issue?

Thanks
Ryan

If it's the later year style with those interlock levers inside, you may want to pull cover to see that they are properly aligned.

Reverse lever installed upside down?

By later style do you mean the overdrive transmission? As this is not an over drive. If not do you have a picture of how they should look?

And thanks toomany62's i've verified the rods are all correct.

Ryan

Time to pull the side cover...

NP made two different styles of the side covers that went onto the NP833 trannys put in Mopar 4 speed cars, the early ones where used from 1964 to 1971 or so. The early ones used the rooster comb type selectors, the later ones used the scissors type side covers like GM used with the better steel shifting forks
On your deal I would disconnect all the shifter rods from the shifting arms and make sure the tranny is in neutral and then see if you cam manually shifted the 1st and second shifter arms on the side case, same thing on the 3rd and 4th arm
if you can't move them then the tranny has issues inside

ok thanks i will try and take a look. Does anyone know someone around the Spokane WA - Coeur D'Alene area that they would recommend to take a look? The car is on a lift in a garage and i am out of my knowledge here and would prefer not to screw anything up.

Thanks
Ryan

Can't load a pic, but later year shift interlock cover has a Rib on side cover between the 2 shift link studs.

pull the side cover!