gear ratio?
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New User
Joined: May 2002
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From: Pensacola USA
gear ratio?
i have a 89 f150 xlt lariat reglar cab with the 300 I6 EFI with a 5speed. does anyone know what gears came stock on this truck? im really curious because im thinking about changing them, but i want to know what i already got first. any help would be greatly appreciated. thanks.
89 F150 300. K&N equipped
89 F150 300. K&N equipped
Elder User
Joined: Oct 2000
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From: Nebraska
gear ratio?
There were many options. Look in the doorjam and there should be a code you can look up in your owner's manual. Another is to roll under the truck and take a peek at the tag bolted on the diff cover.
Post Fiend
Joined: Jan 2000
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From: Metro Detroit (Redford)
gear ratio?
My Mazda 5 speed (which you also may have) has the following ratios:
3.90, 2.25, 1.50, 1.00, 0.80
INLINE SIX POWER!
'95 F150 XL
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
3.90, 2.25, 1.50, 1.00, 0.80
INLINE SIX POWER!
'95 F150 XL300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
Postmaster
Joined: May 2002
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From: Broken Arrow, OK
gear ratio?
The most common gears were 2.73, 3.08 and 3.55. There are some 4.10 trucks out there, but not many. Automatic trucks typically got the 2.73's, but some 5 speeds got them too. Probably the easiest way to tell is to mark a tire and the pinion yoke and see how many times you have to rotate the pinion to get the tire to go 2 revolutions. If it takes almost exactly 3 rev's on the pinion it's 3.08, 2.73's take about 2-3/4 turns and 3.55's about 3-1/2. If you have a limited slip rear end you'll need to jack up both wheels and count how many times the pinion must spin to make the tires do 1 rev.
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Joined: Dec 2001
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gear ratio?
I've been wondering the same about my 88 model. I'm thinking a 4:11 or something in that vicinity would give it alot more pulling power (and loose top end speed too). What's it take to change the rearend ratio, is it just the ring and pinion gear?
Postmaster
Joined: May 2002
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From: Broken Arrow, OK
gear ratio?
You can swap gears with only the ring and pinion set and a shim set. You will need a dial indicator and some gear marking compound to do the job. If you have any kind of mileage on the rear end I recommend changing all the bearings and races while you're in there.
FWIW, I've got 3.08's and first gear is completely worthless unless I'm pulling a load. Going to a 4.10 would basically have you taking off in 2nd gear all the time. Unless you tow heavy loads all the time I wouldn't go lower than a 3.55. If you have larger tires you could go lower, but with the stock tire height I think it's a waste.
FWIW, I've got 3.08's and first gear is completely worthless unless I'm pulling a load. Going to a 4.10 would basically have you taking off in 2nd gear all the time. Unless you tow heavy loads all the time I wouldn't go lower than a 3.55. If you have larger tires you could go lower, but with the stock tire height I think it's a waste.
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