anyone with a dually 5 sp and 4.30 gears - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 08-12-2010, 07:28 PM Thread Starter
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anyone with a dually 5 sp and 4.30 gears

if any of yall have either 4.10 or 4.30 gears in your truck with a 5 speed

can you tell me what rpm you are running at 65 ?

i checked my door code and it comes out to a 4.10 ratio
but at 65 im running just a hair over 2500 rpm and if i use that on the calculator at ringpinion.com it comes out to a 4.30 rear

so im trying to figure out which one i have

any help would be appreciated

1993 Ford F350 Crewcab dually 7.3l IDI NA 5 speed
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post #2 of 2 (permalink) Old 08-14-2010, 08:19 PM
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If the door code indicates a 4.10 RAR then that is what you have, unless someone changed it, which is doubtful.

Tire size affects how fast the vehicle goes for a given RPM and even the same "size" tires in different models or from different manufacturers will vary. Therefore, the most accurate thing is the sticker, so in your case, 4.10s.

'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
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