3.73 dually diff? - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 06-26-2013, 08:08 AM Thread Starter
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3.73 dually diff?

Im curious if Ford produced a 10.25 diff for a factory dually pickup with 3.73 gears? I had o e in a custom 4x4 conversion but I didnt know if it was pieced together or not.
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post #2 of 12 Old 06-26-2013, 08:55 AM
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To my knowledge the only gear sets for a 10.25 from the factory were 3.55 and 4.10.


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post #3 of 12 Old 06-26-2013, 01:21 PM
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Nope. Not from the factory in obs trucks.

FRANK THE TANK
DIY INTAKE - HYDRA CHIP - MARTY'S E-FUEL - 250/200s
05 AXLE SWAP 3.73 - 2.5" PURE PERF. LIFT COILS - FOX SHOCKS
BTS TRANS - TYMAR DOWN PIPE - 4" EXHAUST
Waiting To Be Installed... gtx4294r, studs, springs, HPOP?
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You are so smart Frank, I dont care what Terry says.
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post #4 of 12 Old 06-27-2013, 07:57 AM
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Thry didnt come drom factory but you you can get them aftermarket


2016 F450 6.7L XLT 4x4Dump, bone stock
1994 F250 7.3L XLT 4x4 ZF5 , Centurion, 4" Lift, 6637, Gulf Coast Bypass Filter, Big fuel tanks, dana 60 swap, No longer dually
1997 F350 7.3L XLT 4x4Dump, E4OD, 4 in exhaust, TS 6 position, 3/8 Trans line+external filter
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post #5 of 12 Old 07-02-2013, 06:48 AM
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I am in the process of putting a SD Dana 80 3.73 dually rear in my 4.10 geared OBS Dually. When I finish the project I'll post a how-to. It'll be nice to have the beefier rear, disk brakes, and taller gears.
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post #6 of 12 Old 07-02-2013, 08:17 AM
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What are u gonna do about the different bolt pattern?

FRANK THE TANK
DIY INTAKE - HYDRA CHIP - MARTY'S E-FUEL - 250/200s
05 AXLE SWAP 3.73 - 2.5" PURE PERF. LIFT COILS - FOX SHOCKS
BTS TRANS - TYMAR DOWN PIPE - 4" EXHAUST
Waiting To Be Installed... gtx4294r, studs, springs, HPOP?
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You are so smart Frank, I dont care what Terry says.
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post #7 of 12 Old 07-02-2013, 09:02 AM
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I am machining the hub to accept thread-in studs between the existing studs in the correct bolt pattern and turning the hub down to the correct size. I will post pics once I get started on the machine work.
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post #8 of 12 Old 07-02-2013, 09:09 AM
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Gotcha... sounds good.

FRANK THE TANK
DIY INTAKE - HYDRA CHIP - MARTY'S E-FUEL - 250/200s
05 AXLE SWAP 3.73 - 2.5" PURE PERF. LIFT COILS - FOX SHOCKS
BTS TRANS - TYMAR DOWN PIPE - 4" EXHAUST
Waiting To Be Installed... gtx4294r, studs, springs, HPOP?
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You are so smart Frank, I dont care what Terry says.
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post #9 of 12 Old 07-02-2013, 09:59 AM
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Will be a bit, this project is on the back burner right now. Working on a front end overhaul this weekend... tie rods, bushings, ball joints, shocks, brakes, etc...
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post #10 of 12 Old 07-02-2013, 02:03 PM
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even more fun

FRANK THE TANK
DIY INTAKE - HYDRA CHIP - MARTY'S E-FUEL - 250/200s
05 AXLE SWAP 3.73 - 2.5" PURE PERF. LIFT COILS - FOX SHOCKS
BTS TRANS - TYMAR DOWN PIPE - 4" EXHAUST
Waiting To Be Installed... gtx4294r, studs, springs, HPOP?
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Originally Posted by STROKED_NY_023 View Post
You are so smart Frank, I dont care what Terry says.
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