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Differential Lockers and Limitied Slip Units
Like Randy, I think a little weight over the drive tires helps a bunch too.
According to the plow manufacturer my truck needs a minimum of 700 # of ballast, all of it as far behind the rear axle as possible when snow plowing. I run 1,000 # and it makes a huge difference, plow or not.
When we order the trucks we rarely spec. them with L/S unless it's a 2wd truck, or a 1/2 ton gas truck, the diesels just rip them up anyways.
My truck walks in & out my cottage road (goat path?) in 2WD like it's a half-track, as long as I have some weight over the back 4 wheels. Empty the truck spins on wet asphalt under normal acceleration.
Best of luck.
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Differential Lockers and Limitied Slip Units
Maybe I wasn't clear enough......
In the PC terminology, my truck is tractionally challenged.
If traction was rated as a 1 to 10 scale, 10 being unspinnable, 1 being "you're going nowhere", my truck kind of lines up like this.
On dry pavement at say 72°, the unladen rear end is about a 4.
On wet pavement, the unladen rear end is about a 2.
Moderate ballast basically doubles those numbers. The 1,000 # I run all winter makes it nearly unstoppable.
A locking or L/S rear end wouldn't be anywhere near as good at getting, and keeping, the truck rolling.
So, my point was, IMHO the rear end lock is only the thin edge of the (highly over-rated) 'traction' wedge.
Why spend hundreds of dollars for something that likely won't do jack anyways. Toss some weight on the drive tires and just be done with it.
Best of luck.
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Differential Lockers and Limitied Slip Units
When I lived in the (sort of) suburbs I had a neighbour who had bought the most expensive house he could possibly afford, at the expense of everything else, including his wheels.
It was almost comical, nice house, 2 15 - 20 year old derelict cars, 19" push mower for a 2 acre lot, etc., etc.
I routinely had to boost his car, or plow the winrow left by the town snow plow, so he could get out of his driveway. He had no snow blower or anyone to clear the driveway either. He said shovelling was cheaper than paying for membership at gym. ;->
Then one snowy morning, much to my surprise, he pulled up in a brand new Toyota 4Runner, smiling ear-to-ear, told me I had boosted his car and plowed his driveway for the last time, and off he went down the snowy road.
When I got out near the main road, were our street made a big sweeping downhill curve, there in the middle of somebody's lawn, was my neighbour & his new truck.
It seems he had failed to read the part in the owner's manual about 4WD having little impact on the steering or brakes effectiveness.
It's real good at getting idiots going way too fast though.
Best of luck.
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Differential Lockers and Limitied Slip Units
"We should be seeing a bunch of them at first snow any day now.  "
Been there, done that already ......
Friday was a true example of the old adage about the weather in Canada, "If you don't like the weather, either wait 5 minutes and it will change, or drive a few miles down the road, it will be different there.".
One of my crews are finishing up a job north of here a ways, about 400 miles north actually.
In Toronto it was sunny and 65° on Friday, it was 34° and they got a little over 4" of wet snow at the site.
Best of luck.
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