87 F-250 Rearend - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 12-21-2010, 08:12 PM Thread Starter
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87 F-250 Rearend

I have recently purchased a 1987 Ford F-250 4x4 6.9L Diesel. I have had a few of these old trucks. I've had some with a 4:10 rearend I had one with a 3:55. I 'm not sure what rearend this truck has. Someone told me you could look on the sticker on the door post and it would tell you. On the sticker it says axle C5.
If anyone knows what this means I would appreciate some help.
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post #2 of 5 (permalink) Old 12-24-2010, 12:55 AM
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Im betting its a 3.55, the 4.10 ratio were mainly in duallys and F350 trucks. Can you look and see if there is a tag on the rear end? Going by the tag on the door might not be 100% accurate if someone swapped out the gears on you.

If you dont have a tag and really want to know 100% you can tell us your RPM's at certain speeds.

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post #3 of 5 (permalink) Old 12-24-2010, 04:41 PM Thread Starter
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I'll take a look at the rearend and see if I can find a tag on it. I appreciate the info.
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post #4 of 5 (permalink) Old 12-24-2010, 10:14 PM
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Ya you should see somewhere a 355 or 410 prolly the last three numbers on there.

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1994 F-350 SRW Crew Cab 4x4 Dana 60 Front, 4.10 Gears with a E4OD

SOLD-1992 F350 7.3
Ryans 92 Diesel Pictures

SOLD-1985 F250 6.9 NA
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post #5 of 5 (permalink) Old 01-02-2011, 01:35 PM
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Cool rear axle

c5 is a 355 limited slip if you have the owners manuall there is a section that shows the axle ratios and weights
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