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Old 01-14-2010
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Icon5 gear question for 31's

just so yall know im lifting the truck i ordered tires already 31/10.5/15(Kumho Road Venture MT KL71) kuhmo road ventures mt's and ordering the 3in fabtech spindles next week. still debating on which rims . everywhere i read says they lose overdrive with a 2.3 with 31 inch tires is that true? i have automatic with 4.10s now. do i need to bump up to 4.56s or 5.13s to keep acceleration and highway speeds without having my tach pegged out?

also how do i order gears if i need them i found some on ring and pinion.com but just ford 7.5in 28spline is all i need to know before ordering? and im getting a limeted slip carrier off ebay for $280+whatever gears cost me would i be better off ordering a all in what locker with gears kit from somewhere? thanks im confused lol
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Old 01-14-2010
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Try it first with the 4.10s and see how it feels. My FX4 has 4.10s and I'm running 31s, and IMO its WAY too deep for the V6, hence why I drive at 55 on the highway. 3.73s would be better for me, so a 4 banger *should* be happy with 4.10s. Well, I'm running 2250 rpm @ 65 mph with my setup (which should be the same as yours considering the gears are the same), is that where you like it running on the highway or would it be happy with around 2500 rpm (4.56s)? Gears should be reasonably cheap, its the install and setup that generally costs. If its a DD then a LS is fine, if you're 4x4ing it then skip the stock stuff and buy a locker and 4.56s for sure.

BTW, a good buddy of mine is running the same tires and he's pretty happy with them, they're 2 years old and see around 60 miles of commute a day plus offroad use, they're holding up well and wearing well. LR
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Old 01-14-2010
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What size tires do you have stock? I would order the gears from CompleteOffroad.com.

Last edited by KLC; 01-14-2010 at 07:19 PM.
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Old 01-14-2010
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Quote:
Originally Posted by KLC View Post
What size tires do you have stock?
Me? i have 225/70 15

i read LOTS of reviews before buying tires. just waiting on my income tax to get the lift and rims. 80% sure on dc1s

its my dd.

klc did you do your own install on the gears ?
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Old 01-14-2010
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Quote:
Originally Posted by Spc_Austin View Post
Me? i have 225/70 15

i read LOTS of reviews before buying tires. just waiting on my income tax to get the lift and rims. 80% sure on dc1s

its my dd.

klc did you do your own install on the gears ?
4.10's would be closest to stock, and 4.56's would give you more power. If you do quite a bit of highway driving then I would go with 4.10's. And, yes, I installed my gears, L/S, and locker.
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Old 01-14-2010
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k well i have 4.10s stock...could you point me to the right limited slip i need?
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Old 01-14-2010
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Quote:
Originally Posted by Spc_Austin View Post
k well i have 4.10s stock...could you point me to the right limited slip i need?
You do, don't you. Guess I have selective reading.

So you said you have a 7.5 28 spline?
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Old 01-14-2010
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yep.
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Old 01-14-2010
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Why don't you get a low mileage 8.8 28 spline axle with 4.10 gears and a factory L/S?
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Old 01-14-2010
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what would it need to be out of? a newer fx4 or explorer?
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Old 01-14-2010
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so my gears just unbolt and bolt to that?
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Old 01-14-2010
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Quote:
Originally Posted by Spc_Austin View Post
what would it need to be out of? a newer fx4 or explorer?
All 1990 and up 4.0-liter Rangers have a 8.8-inch 28-spline rear axle.

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Originally Posted by Spc_Austin View Post
so my gears just unbolt and bolt to that?
Yes, but the downside is that unit uses clutches, which means it will wear out. If it was me I would go with a helical gear driven L/S. Like this one: Detroit TrueTrac Differential

Now you are talking big money though, and I wouldn't spend that much on a 7.5-inch 28-spline axle.

Last edited by KLC; 01-14-2010 at 08:14 PM.
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Old 01-14-2010
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i got a 4 banger with 4.10's and i could run 33's with the 4.10's go for the 4.10's
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Old 01-14-2010
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ouch thats almost as much as the lift lol ... i mean seriously the clutches should last ahwile right? for 210 shipped thats not bad.
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Old 01-14-2010
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my clutch lasted a pretty good while with 3.73's, alot of towing and 31's...i would go with 4.56's tho, but if u can get an 8.8 pro 5.0 makes wierd gearing(4.30, 4.46,etc) aand u could get it perfect
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Old 01-14-2010
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Quote:
Originally Posted by Spc_Austin View Post
ouch thats almost as much as the lift lol ... i mean seriously the clutches should last ahwile right? for 210 shipped thats not bad.
Yeah, you'll be fine. I would just go with the Traction-LOK for a 7.5.
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Old 01-14-2010
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thats probably what ill do. im doing everything at the auto craft shop on base but if i decide not to install the posi myself you want to help ? id pay you

im gonna make a build thread as soon as every thing comes in.
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Old 01-14-2010
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come to ga and i'll help ya install it
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Old 01-14-2010
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Quote:
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come to ga and i'll help ya install it
NEGATIVE thanks but no thanks lol i lived in georgia from oct 06 to july 09 and HATED IT lol it rains to much and it stinks all the time. good food though and the beach was fun
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Old 01-14-2010
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Quote:
Originally Posted by Spc_Austin View Post
thats probably what ill do. im doing everything at the auto craft shop on base but if i decide not to install the posi myself you want to help ? id pay you

im gonna make a build thread as soon as every thing comes in.
Sure, just let me know.
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Old 01-14-2010
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ok hopefully have everything ina cpl weeks the day the money hits my bank im going crazy with it .
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