I have an '82 F-150 with a 300 and a 4spd transmission. On the shifter it says 1, 2, 3, OD. Does that mean 1st is a granny gear?

 

The easy way to tell, is to put it in first, let the clutch out, climb out of the truck, take a leak and when your done, the truck shouldn't have traveled more an a few inches.

Not really, but that's the idea. In my granny trannys, first gear tached out at about 15mph.

 

In your case, no, 1st isn't a granny gear. Your tranny is meant to take off in 1st and then you go through 2nd and finally 3rd with 4th as an overdrive for the highway.

If you had a granny gear, it would be non-synchronized and you'd take off from a stop in 2nd. You either have a Clark or SROD model 4 speed tranny. A trans with a granny gear is either a T-18 or an NP435.

 

Thank you very much. I didn't think it had the granny gear since it has OD. I don't think my speedometer is terribly accurate, but 1st gear tops at around 20-25 mph.

 

I had an 83 F-150 4x4 with a 300-6 and an NP435 trans with granny 1st. I used to live near this unpaved hill that had an 8% grade that was about 1/4 mile from the bottom to the top. It was a huge hill. I could throw the truck in 4-low, trans in granny low, and walk down the hill and wait, wait, wait, for it to come to me. I don't think it even went over 2 mph max going downhill.

 

When I put my 84 in granny/4 low @ 3500 rpm the speedometer doesn't even twitch! Low gears are fun!

 

I have 1989. F150 xlt lariat with 4 speed transmission how do i know if i have granny gear when i put in first it goes slow but when i shift to 2nd it revs high as if i skipped a gear as if i through it back in 1st

 

I believe that anything from 1987 and later should either have a 5 speed or a 4 speed granny. Everything I've seen seems to show they discontinued the 4 speed overdrive transmissions before the 1987 model year.