Does Sport Mode lock rear axle?

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Bombsquad68

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It is not true limited slip, just an open locking rear differential, but I also think Ford uses the brakes to provide a limited slip effect while the truck is in motion. I could feel the rear squirm laterally when I was climbing a slippery hill under power on the highway. You don't get that if it's just a peg leg, it'll just spin one side.

It's not the worst in practice, some very powerful RWD cars get away with just using the brakes for an LSD-like effect but it's also not instantaneous like a true LSD rear and it also doesn't work at a standstill. So pulling out from a stop on ice or doing a burnout would expose the limitations of the system.

The best solution is to just throw it in 4 Auto and let the front end and Torsen work their magic. The transfer case DOES have clutches as mentioned and the auto setting seems very quick and seamless sending power around.
 

03'Darin

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It is not true limited slip, just an open locking rear differential, but I also think Ford uses the brakes to provide a limited slip effect while the truck is in motion. I could feel the rear squirm laterally when I was climbing a slippery hill under power on the highway. You don't get that if it's just a peg leg, it'll just spin one side.

QUOTE]

This is correct. E-locker or open axle, no limited slip. Also correct on the TC limiting wheel slippage on one wheel.
 
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