New Gears......
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Joined: Dec 2000
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New Gears......
Looking at a '93 F-150 w/300ci six auto and 3.08 gears. How can I find out what size rear end I have so I can purchase new ring and pinion (lower ratio)? Also will I have to do anything to the tranny if I do lower the ratio? Thanks in advance.
Senior User
Joined: Nov 2000
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New Gears......
>Looking at a '93 F-150 w/300ci
>six auto and 3.08 gears.
>How can I find out
>what size rear end I
>have so I can purchase
>new ring and pinion (lower
>ratio)?
If it were me, I'd probably buy the whole rear end, so I didn't have to mess around installing a new ring and pinion. I'm not that great of a mechanic, I've watched guys setting up the lash on a rear end and it looks a little tricky.. But that's me..
Also will I have
>to do anything to the
>tranny if I do lower
>the ratio? Thanks
>in advance.
If your speedometer is connected to the tranny, you will probably need to put a different speedo gear in to make your speedometer accurate again.
LeRoy Wolff, original owner of
1984 Ford F150
300 six 3 speed with overdrive
optional dual rusted out fenders
truck's nick name "Old Red"
>six auto and 3.08 gears.
>How can I find out
>what size rear end I
>have so I can purchase
>new ring and pinion (lower
>ratio)?
If it were me, I'd probably buy the whole rear end, so I didn't have to mess around installing a new ring and pinion. I'm not that great of a mechanic, I've watched guys setting up the lash on a rear end and it looks a little tricky.. But that's me..
Also will I have
>to do anything to the
>tranny if I do lower
>the ratio? Thanks
>in advance.
If your speedometer is connected to the tranny, you will probably need to put a different speedo gear in to make your speedometer accurate again.
LeRoy Wolff, original owner of
1984 Ford F150
300 six 3 speed with overdrive
optional dual rusted out fenders
truck's nick name "Old Red"
Posting Guru
Joined: Apr 2000
Posts: 1,345
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From: NorCal
New Gears......
Your 93 F-150 has a Ford 8.8" rearend. All shops carry ring and pinion gears for these common rearends. You might need the axle spline count too, which is 31.
As for the speedo, 91 was the last year it ran off of the tranny. In 92+ trucks, it's electrical and runs off of the ring in the rear diff. (Or so I was told) Which means if you change gears in a 92+ truck, you wont need to recalibrate the speedo. You'll only need to recalibrate it if you add larger or smaller tires.
As for the speedo, 91 was the last year it ran off of the tranny. In 92+ trucks, it's electrical and runs off of the ring in the rear diff. (Or so I was told) Which means if you change gears in a 92+ truck, you wont need to recalibrate the speedo. You'll only need to recalibrate it if you add larger or smaller tires.
