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what gears do i have

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Old Jul 23, 2011 | 10:59 PM
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what gears do i have
i have a 93 f250 2wd with a e4od and 235/85/r16 tires and i run at 2500rpm at 70mph what size gear do i have?
 
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Old Jul 23, 2011 | 11:23 PM
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should be a tag or a stamp on the rear diff.......
 
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Old Jul 23, 2011 | 11:35 PM
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That seems about the same as me, and I've got 4.10s...
If you still have the door tag, the axle code will tell you.
 
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Old Jul 23, 2011 | 11:50 PM
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No tag will tell you if the tach is off or if the PO changed gears and didn't document it. I assume I have 3.55 gears but at 55MPH, I see 1850-1900 RPM. My timing meter is 200-300 RPM lower than my tach. Check that out first.
 
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Old Jul 24, 2011 | 10:06 PM
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4.10's or higher if your tachometer is accurate. No way it's 3.55 unless you have other transmission issues.

Thad
 
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Old Jul 24, 2011 | 10:43 PM
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Originally Posted by vfelix702
should be a tag or a stamp on the rear diff.......
2X there sould be a tag on the rear diff thats held on by one of the diff cover bolts.
 
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Old Jul 24, 2011 | 10:52 PM
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did ford have anything higher than 4.10 how can i check the tack to see if its off by this much also i checked and there is not a tag on the diff
 
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Old Jul 24, 2011 | 11:24 PM
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There were only 2 popular gears in the pickups 4.10 and 3.54. What does the axle code in the door say?
 
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Old Jul 25, 2011 | 12:55 AM
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Wanna be certain? Drop the cover off (after draining it), count the number of teeth on the ring gear (larger one) then count the teeth on the pinion gear. divide the amount of ring gear teeth by the number of pinion teeth. The result is your ratio. Its always a good thing to service your axle anyway. Lots of people forget it...
 
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Old Jul 25, 2011 | 06:29 AM
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Originally Posted by 84-6.9L
2X there sould be a tag on the rear diff thats held on by one of the diff cover bolts.
True but the likelihood of them having been changed is also fairly high. Myself and a guy I talked to yesterday both had this issue.

Thad
 
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