Gear question for y'all
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Elder User
Joined: Nov 2005
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Gear question for y'all
I am rebuilding the stock axles on my 94 F-150. I'm putting a Lock Rite in the rear, and a Power Lock in the front. I will be running 33's, but I know I can fit 35's. Heres the thing. If I go with a 3.73, then I can get a 3.73 R&P set for both front and rear. Thats fine if I stick w/33's but if I decide to go to 34 or 35" tires, I'll need lower gears. If I go with a 4._ _ all I can seem to find on JBG (and Randy's) is a 4.09 for the D44TTB, and a 4.11 for the rear. Randy's actually has 4.09 for the front, and a 4.10 for the rear, but they don't have the differentials that I want. JBG has the diffs that I want at a good price. If I order everything from them then I won't have to pay out the wazoo for shipping.
Here's the question; is 4.09 front/4.11 rear too big of a jump? I don't use my 4WD unless I'm muddin or driving on really loose/slick terrain (fresh gravel, sand, snow/ice, mud, etc). I think I will be okay, but would like some of y'alls opinions. I feel sorta stupid asking this, because I know they usually do a .01 ratio difference from the factory, but...
Here's the question; is 4.09 front/4.11 rear too big of a jump? I don't use my 4WD unless I'm muddin or driving on really loose/slick terrain (fresh gravel, sand, snow/ice, mud, etc). I think I will be okay, but would like some of y'alls opinions. I feel sorta stupid asking this, because I know they usually do a .01 ratio difference from the factory, but...
Lead Driver
Joined: May 2000
Posts: 9,236
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From: Senoia, GA
there is more of a difference when running different tire pressures than there is with .02" of difference in the gear set.
you'll be fine, not to mention the only time you need to be in 4x4 is on somewhat soft surface so there should be plenty of slip
-cutts-
you'll be fine, not to mention the only time you need to be in 4x4 is on somewhat soft surface so there should be plenty of slip
-cutts-
Postmaster
Joined: Feb 2003
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From: Muskegon, MI (home)
I am running 4.09s in the front and 4.10s in the rear in my 84 F150 with 33s, it works fine... no binding at all. I am also running a Trac Lok in the front and and a Powertrax No-Slip in the rear, I love it... goes anywhere off road!
New User
Joined: Feb 2005
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From: Whitehall, Michigan
I am running the same setup in my Bronco with 35" tires and it is pretty nice. Raod manners are not to bad and very nice offroad. I was thinking about 3.73 vs the 4.11 and now I almost wish I would have went 4.56 ...... I don't drive over 60mph so the the 4.56 would still work for me, but At 75 the rpms would probably be a little to high.
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Post Fiend
Joined: Mar 2005
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From: Louisiana
Like previously mentioned, the .02-.03 difference is ok.
Your I6 is torqy enough to push 35s with 3.73, but what is the gear ratio of your first tranny gear, and what type of driveing do you do with this thing?
Interstate, in town, mixed, off road?
Your I6 is torqy enough to push 35s with 3.73, but what is the gear ratio of your first tranny gear, and what type of driveing do you do with this thing?
Interstate, in town, mixed, off road?
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i got 4.10s with my 93 150 and 33" tires. i think that is a great combo, goin about 70mph im turning about 2800 rpm. and its great offroad, put it in 4lo and feels like you can pull anything with the I6.... "feels" 
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Elder User
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FordPickup460, although I was previously aware of that, thank you for bringing it up for others who may not have,
Pkupman82, That is exactly what I was hoping somebody would say... Thanks for testing the waters for me
MBBFord, I drive about 500 miles a week, 460 of those miles being interstate at 65-75mph, the other 40 of those miles at 55 or under. We have 5 or 6 mud bogs, and 3 or 4 trails here and there, and I hit those on the weekends.
78ihs2 Is that with a 4 speed or 5 speed tranny? If 4 speed, are you talking a 1:1 ratio in 4th gear?
Pkupman82, That is exactly what I was hoping somebody would say... Thanks for testing the waters for me
MBBFord, I drive about 500 miles a week, 460 of those miles being interstate at 65-75mph, the other 40 of those miles at 55 or under. We have 5 or 6 mud bogs, and 3 or 4 trails here and there, and I hit those on the weekends.
78ihs2 Is that with a 4 speed or 5 speed tranny? If 4 speed, are you talking a 1:1 ratio in 4th gear?
Post Fiend
Joined: Mar 2005
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From: Louisiana
For that many hwy and interstate miles, 3.73 would be ok for the 33s, and good for the 35s when it comes to low RPMs. You won't have the best acceleration with 3.73s and 35s, but the low rpms should over compensate the fuel used to exelerate w/ that many miles.
IF you can get or have a overdrive, then go with 4.10s.
IF you can get or have a overdrive, then go with 4.10s.
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