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Locking Rear End Feature
Mine is 2011 SD. Has the locking rear end feature.
Question: What is intended purpose of this? When to use? When not to use this feature?
Can turn truck L or R when locked?
Question: What is intended purpose of this? When to use? When not to use this feature?
Can turn truck L or R when locked?
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Use it when you want to. It will turn, but the rear wheels will scratch. I hardly use mine. Mostly use 4wd. But I do use it. Be careful, sometimes with it locked both wheels will spin and it will cause the rear end to slide.
1996 F250 4x4 ext. cab, long bed 5 spd. 3.55ls, Tymar Intake, Tymar 4" downpipe and 4" exhaust. AIC, B&W turnoverball, EBPV brake, tranny temp gauge, boost gauge, and egt gauge. 2.5" axle drop bracket, F350 springs up front, and F350 rear axle blocks. 260k miles. RETIRED.
NEW (to me) 2005 F350 FX4 Crewcab shortbed, SRW, Lariat, auto, V10. 5600 lbs front end.
Long ago, Used it one time pulling RV, making transfer from wet grass to dry pavement, up an incline. Sharp right turn, hear loud knocking noise from rear, while on pave part. And some shuttles. Once straight on pavement, disengaged lock, ok.
Scare me.
But found it unusual. I was mechanic in my youth, understand differentials, even limit slip (posi traction)types. But this locking rear function concerns me, worry if any damage here. I do have lots of miles, towing and untethered, nothing adverse happened.
Just trying to understand why this happened!
Scare me.
But found it unusual. I was mechanic in my youth, understand differentials, even limit slip (posi traction)types. But this locking rear function concerns me, worry if any damage here. I do have lots of miles, towing and untethered, nothing adverse happened.
Just trying to understand why this happened!
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A locking diff is just that. it locks both rear axles together. A limited slip will transfer power to the wheel with traction. I have used mine in the snow a couple times when the snow gets deep. If you go around a corner with the diff locked only thing that will happen is it will slide the inside tire. Just don't make it a habit on dry surfaces.
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Quote:
Originally Posted by CajunMick
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Long ago, Used it one time pulling RV, making transfer from wet grass to dry pavement, up an incline. Sharp right turn, hear loud knocking noise from rear, while on pave part. And some shuttles. Once straight on pavement, disengaged lock, ok.
Scare me.
But found it unusual. I was mechanic in my youth, understand differentials, even limit slip (posi traction)types. But this locking rear function concerns me, worry if any damage here. I do have lots of miles, towing and untethered, nothing adverse happened.
Just trying to understand why this happened!
Scare me.
But found it unusual. I was mechanic in my youth, understand differentials, even limit slip (posi traction)types. But this locking rear function concerns me, worry if any damage here. I do have lots of miles, towing and untethered, nothing adverse happened.
Just trying to understand why this happened!
'19 F-350 CCLB Lariat SRW Fx4 PSD
Ordered 2-Oct-18 arrived at dealer 20-Nov-19
Senior Member
I've used mine in wet grass, slick boat ramps, and coming up my steep snow-covered driveway. It definitely is better than my 2001's limited slip rear end. I've had it not disengage once and in a turn, the inside wheel started hopping. Best way I've found to make sure it unlocks is to stop, turn it off, shift to neutral and let the truck roll back a bit, then shift back into drive. Use this only where both wheels can spin freely if needed.
FOKISD Charter Member from Hillsboro, OHIO
2015 F-250 XLT, SC, LWB, 6.2L V8, 6R140, 3.73 E-Locker, Bronze Fire, Roof Lights, Upfitter Switches, Wheelwell Liners. ORDERED 6/10/14, delivered 8/26/14............let the mods begin!
I STILL miss my V-10 !
Check my
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for modifications: Weathertech all weather floormats, Weathertech dark wind deflectors, Groboski Highland Mudflaps, ARE DCU Cap, Truck-lite ID bar, Blazer Aux back-up lights, Wolf Automotive van console, Berkeley Fishing Rod Holders, Bilstein 4600's.
2001 F-350, XL, SC, LWB, 6.8L V10, 4R100, 3.73 LS. RETIRED at 214,500 August 2014.
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Last edited by Homegrown; 02-05-2019 at 11:22 AM.
This thing unlocks all by itself at speeds above 15MPH I believe. Then when you get below that speed it locks up again.
Thanks for the information, folks.
Except for straight ahead drive, Guessing never use lock rear when towing RV.
Except for straight ahead drive, Guessing never use lock rear when towing RV.
jwbboat likes this.
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