rear gear?
Junior User
Joined: Nov 2010
Posts: 95
Likes: 0
Check for a tag on the rear diff or check the front diff. The front diff will be .01 higher then the rear. Like if the rear says 3.55 the front will be 3.54. If there are no tags then if you want, jack the rear up and put tranny neutral. Spin the drive shaft around how ever many times it takes the tire to go around once. So if you spin the shaft a little more the 3 and a half times you have 3.55's or if it's a little over 4 times you have 4.10's. You could maybe have 3.73 but I would guess the 3.55 or 4.10. Also check if you have a tag on the rear diff for an L in the gear ratio number, that will indicate limited slip rear end. Sorry for the long response and good luck.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Print off a copy of this chart and take it with you to compare to the axle code on the drivers door pillar.
Ford Axle Code Chart .: Articles
Ford Axle Code Chart .: Articles
Fleet Mechanic
Joined: Aug 2005
Posts: 1,462
Likes: 74
From: Hartford, AL
Print off a copy of this chart and take it with you to compare to the axle code on the drivers door pillar.
Ford Axle Code Chart .: Articles
Ford Axle Code Chart .: Articles
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Similar to what Post #3 says to do, I find it easier to turn the wheel(s) around once and count how many times the driveshaft rotates.
Lift both wheels off the ground, a Limited Slip differential (if installed) can cause confusion.
Lift both wheels off the ground, a Limited Slip differential (if installed) can cause confusion.
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99powerstrokeSD
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Jun 11, 2007 11:24 AM
