Gearing
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New User
Joined: Dec 2003
Posts: 14
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From: San Antonio, TX
Gearing
Hey guys, wondering what you might think here.
Going to be running 325/80R16's with 16x10 rims on a 67-72 F250 4WD. they come usually with 4.11's but i will be doing alot of freeway driving with some heavy towing at highway speeds and some mild off-roading. should i go up? if so, how high should i go? i was thinking 4.56's front and rear, what do you guys think? higher? lower? i am not too worried about gas mileage (who is with these bad boys???)
I don't, however, want my RPM's skyrocketing when i am cruising down the freeways at 75 mph. Any ideas???
Going to be running 325/80R16's with 16x10 rims on a 67-72 F250 4WD. they come usually with 4.11's but i will be doing alot of freeway driving with some heavy towing at highway speeds and some mild off-roading. should i go up? if so, how high should i go? i was thinking 4.56's front and rear, what do you guys think? higher? lower? i am not too worried about gas mileage (who is with these bad boys???)
I don't, however, want my RPM's skyrocketing when i am cruising down the freeways at 75 mph. Any ideas???
Postmaster
Joined: Dec 2002
Posts: 3,959
Likes: 9
From: USA
Iwould go 4.56 or 4.88 with 37's, 4.88 if you will be towing. You want an equivalent ratio to 4.10 with stock tires for towing. Go to www.ring-pinion.com to use their calculator for tire size/gear ratio/rpms. Stock tire size is probably ~31".
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