Its a 1988 f150 4x4 302 m5od 5 speed.

Since ive had the truck, it wont go into 4th. The tranny is nice and tight and slides right into 1st, 2nd,3rd, 5th & reverse just fine. But if i try to shift into 4th, its like its not there. Doesnt grind when i try .....It just stops like theres a wall stopping it from going in.

Im sure its something simple. Im thinking maybe a sycro hub or somethin.

I need Help! I'd like to have my 4th back!