rear diff upgrade - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 05-15-2010
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rear diff upgrade

Hey guys im wanting to upgrade my rear differential to something a little stronger, im looking and either getting an explorer 8.8 LSD w/ 31 spline axles and 4:10's
or a Ford 9" LSD with 31 spline and 4:10's

the reason i want the expo axle is because of the rear disk brake, but i hear they are hard to find with an LSD.. so i was wondering what the code for the 31 spline LSD with 4:10s is?

i would like the 9" because well they are bullet proof and i plan to throw a built 5.0 in later on, so if i go that rout what car or truck has a 9" with the closest hub face detentions and 4:10s?

or is there any other options that might be better for me?

Thanks for the help and ideas,
-Andy
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Old 05-15-2010
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Expo's are easy to find with l/s, but finding it with that and 4.10's is hard. Nine inch is no where near bolt on and as far as I know there isn't anything close to stock dimensions for our rangers.
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Old 05-15-2010
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im going to start to look for a expo with 4:10 and an LSD, dose anyone know the code for this axle?

and also is an axle out of a open diff interchangeable with an axle with an LSD in it, both 28 spline?
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Old 05-15-2010
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Icon14

Explorer

Code Description Ratio

41 Open 8.8" 3.27
43 Open 8.8" 3.08
44 Open 8.8" 3.73
45 Open 8.8" 3.55
D1 L/S 8.8" 3.27
D2 L/S 8.8" 4.10
D4 L/S 8.8" 3.73
D5 L/S 8.8" 3.73
85 3.55C
89 (1992-1998) 4.10C
89 (1999-2001) 4.56C
F5 3.55L
K6 4.10L
L - Limited Slip Differential
C - Conventional Differential

Last edited by 94Ranger355; 05-15-2010 at 09:00 PM. Reason: ///
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Old 05-18-2010
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thank you!
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Old 05-18-2010
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so essentially, if you find a 4.10 8.8 it's a l/s?

(with the exception of the k6 code and 89 code, as that doesn't spesify open or not or 8.8 or not)
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Old 05-18-2010
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looks like it!
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Old 05-18-2010
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BTW, most explorer axles come with LSD. I got mine for like $200-$250 with brakes and everything.
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Old 05-18-2010
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with 4:10s?
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Old 05-18-2010
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Quote:
Originally Posted by --weezl-- View Post
(with the exception of the k6 code and 89 code, as that doesn't spesify open or not or 8.8 or not)
Yes it does...K6 is LS and 89 is open
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Old 07-26-2010
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ok guys i finally found a D2! now can anyone help me find the leaf mounting brackets to weld on the axle? and should i keep the same pinion angle or should it be diffrent?
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