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'11-Up General Questions General questions related to 2011-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

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Old 04-20-2010, 04:29 PM   #1 (permalink)
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non-limited slip vs Electronic locking Axle

I m placing my order as soon as I get this anwsered. What is the difference between 3:55 non limited slip axle ratio $1375 vs the 3:55 Electronic locking axle ratio $1765 other than the price.

I am ordering a F350 Lariat CC 4x4 and I plan on putting a 10inh fabtech lift on 22 and 37x13.5 22's thanks for the help.

Any and all info is apprecaited.
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Old 04-20-2010, 04:35 PM   #2 (permalink)
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i would also like to know this.

we are ordering the same thing except not putting a lift on it. the difference between all of them that are offered would be great
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Old 04-20-2010, 06:30 PM   #3 (permalink)
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Go with the E locker,you'll be glad you did if your off the road any at all..
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Old 04-20-2010, 09:17 PM   #4 (permalink)
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The e-locking 3.55 has a switch you pull out (the 4x4 switch) and it will lock the rear axles together creating positive traction (both rear wheels turn at the same speed). A non limited slip rear axle means that only one wheel will be pulling at any given time and there will never be positive traction. Another option that is out there is called a limited slip, this is where durring normal driving only one rear wheel will do the pulling but under a load there are clutches that lock up and cause both rear wheels to do the pulling. Like Rut said, go with the e-locker!
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Old 04-20-2010, 09:45 PM   #5 (permalink)
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I have an '09 F150 FX4 with the electronic locker and I'll never own another truck without it.
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Old 04-21-2010, 12:19 AM   #6 (permalink)
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Is there a diagram of the e-lockers functioning? Like electronic solenoid driving a sliding clutch or?
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Old 04-22-2010, 09:44 PM   #7 (permalink)
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I have an '09 F150 FX4 with the electronic locker and I'll never own another truck without it.
X2. I went from a limited slip F-150 to a brand X with a factory locker and the difference is night and day. I don't care if it's Electronic, air or auto, a locker is priceless. Put a good set of tires on and you can go a ton of places most 4wds can't in 2wd.
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Old 04-26-2010, 08:31 PM   #8 (permalink)
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so my dad is wondering about gears.

he is wondering whether to get the 3.31 Electronic locking or the 3.55 electronic locking.

most trips will consist of city driving as this will become his daily driver but during hunting season will be used to drive over the passes and tow a 18 ft duck boat.

he will also tow a 30 ft trailer over the pass and thats about it, it wont be towed around too much more
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Old 04-26-2010, 09:24 PM   #9 (permalink)
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so my dad is wondering about gears.

he is wondering whether to get the 3.31 Electronic locking or the 3.55 electronic locking.

most trips will consist of city driving as this will become his daily driver but during hunting season will be used to drive over the passes and tow a 18 ft duck boat.

he will also tow a 30 ft trailer over the pass and thats about it, it wont be towed around too much more

Get the E Locker for sure,im a deer/duck hunter myself and it will come in handy..
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Old 04-26-2010, 09:57 PM   #10 (permalink)
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Get the E Locker for sure,im a deer/duck hunter myself and it will come in handy..
arent they both e-lockers?

hes just wondering about ratio's 3.31 or 3.55
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Old 04-26-2010, 10:47 PM   #11 (permalink)
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Ok, I was also baffled by the difference in price between 3.31 and 3.55 axle gears. Regardless of whether you get the e-locker or not, the 3.55 costs $1,375 more than the 3.31 in the KR or Lariat packages. The 3.55 gears cost $1,985 more in the XLT package. The 3.55 gears cost only $125 more in the XL package. The only reasoning I could figure out is WHAT WHEELS come standard with each gear ratio. The 20" wheels are normally an expensive option, but come at no extra charge if you pay for the 3.55 gears. They are not available on the XL, thus the XL has a much more reasonable price difference between the two ratios.

That's as much as I can figure out as to why there is the huge difference on price. I'm not sure what exactly is going on with the XLT, why they are so much more in that package than even the KR or Lariat. Oh, and checked the price difference in the XLT the first time it was a $1,595 difference, then the next time I tried it there was a $1,985 difference. I don't know why.
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Old 04-26-2010, 10:52 PM   #12 (permalink)
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20s are a separate option, they have nothing to do with the axle. 18s are standard on the Lariat and KR. I don't know about the XLT.
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Old 04-26-2010, 11:03 PM   #13 (permalink)
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Yeah, I know, but you can't get the 20 inch wheels at all if you get the 3.31 gears. They are available at no extra charge if you spend the $$ on the 3.55 gears.

Read my whole post man. I'm doing my best to figure out why the 3.55 gears cost so dang much more in all but the XL packages.
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Old 04-26-2010, 11:11 PM   #14 (permalink)
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I mean, come on!! Who in their right mind thinks it's worth it to pay $1,375 more to switch from a 3.31 gear ratio to a 3.55 ratio, especially when they're rated for the same towing capacity from the factory??!!? THAT IS RETARDED !!!!!!

The $125 more with the XL is more in line with what optional gear ratios have always cost.

Sorry for the rant. I'm tired.
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Old 04-27-2010, 12:55 AM   #15 (permalink)
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Yeah, I know, but you can't get the 20 inch wheels at all if you get the 3.31 gears. They are available at no extra charge if you spend the $$ on the 3.55 gears.

Read my whole post man. I'm doing my best to figure out why the 3.55 gears cost so dang much more in all but the XL packages.
The 20s are not free if you order the 3.55 electronic locking axle. I have both and this is what my invoice says

LT 275/65R20E OWL All-Terrain - $1375
3.55 Electronic Locking Axle - $390
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