whats usual rear ratio??

melmount

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I have an 07 250 autowas wondering whats the usual rear gear ratio in these trucks from factory?
 

bushpilot

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in the srw trucks...

the more POPULAR is the 373 in ltd slip...but the only
REAL way to know is to look on the tag (on the pumpkin/cover)
or door jamb label...and even then that only tells you what
the truck left the factory w/. (someone could still change it).

prior to 2003 the 3.73 was standard, 3.73 w/ ltd slip was a option
(i recall looking at MANY new & used trucks from 2000+ and many
did NOT have ltd slip)
 

no-red 6 0

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what he said.

look very closely at the rear pumpkin. it should have a tab tag hanging off of one of the bolts w/ code for what is inside the cover... report back and we can give you the skinny
 

bushpilot

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if the pumpkin tag is stamped 3L73 (as i recently learned here) it means 3.73 Limited Slip
 
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powerboatr

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my is 4:10

you have a F350 he has the 250
250 is pretty much a 3.73 open diff or limited slip unless special order, i had a 250 with 4.10's but again it was a special order truck.

350's can go from srw 3.73, 4.10
duallies 373 (open), 410, 430's offered with limited slip;tu

the 373 replaced the 355 back when we changed frm OBS to the new style in 99, and the 355 was very rare in all except a short bed, single cab 250.
 

bushpilot

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actually jaaw's got a drw...and i believe the more popular gearing in
the drw's is 4L10
 

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