[Christ]

Originally Posted by Milwaukee

Not WORTH IT. I try with my 79 F150. 3.08 gear ratio = WORST. It was hard on clutch.

You don't want put 3.08 it will make mpg worst. I used to get 18-21 mpg with 3.55 then I swap to 3.08. I see 13-14 mpg but engine was work hard it get overheat easy in summer on highway. It struggle to reach 70-80 mph to get rpm at 2,000 that where I used to get 21 mpg at 2,000 rpm. Try 55 mph with 3.08 is FAIL couldn't use overdrive gear in that speed. It need to be 65 mph to use overdrive but very underpower.


You don't have experience with that gear ratio it too much for truck that weight 5k pound.

I have try different gears I would say 3.38 is right for this truck.

Did your '79 have a 300 I6 and a M5R2 trans? Nah, it didn't have that trans... it had a 4 speed.

Either way, I've had 3.08's in a 4speed OD (no granny gear) and never bothered the clutch at all, so unless there was something else working against you, you probably were just being too easy on the clutch pedal when taking off.

That's assuming you even had a 300, because if you didn't, this discussion is moot.