Alright so I just bought a 1978 f100 with a 302, 4 speed manual trans. I jumped in and took off to drive it home, geared up through to 3rd gear. I tried to gear back down again, but it just went into neutral and wouldn't go into any gear at all unless I grabbed the shifter and literally slam it down into gear.. now it doesn't even want to shift up smoothly like before. I have a feeling the clutch needs to be adjusted, but I'm unsure how to do it on a mechanical clutch like this truck.
What gives??

 

On my 300/w g-low 4sp there is a rod near the driver side of the bell housing that pushes the clutch fork towards the rear of the truck. The other end of the rod is threaded for adjusting. If yours is the same adjust the bust toward the front of the truck. Hope this helps.

 

Right on, ill give it a shot. How do I know how far to adjust it?

 

Bump.......

 

Tryall and error