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"posi" Options?


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My 87 Comanche is 2wd and thats just no bueno when its a one wheel peel in the snow... soo, what are my options for making that rear turn both wheels? I know lockers and what not, but i do need to maintain streetability as it is my winter DD and all year truck... I searched, didnt find anything.

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Cheapest option is a Trac-Lok. This is what the factory used, and they are available aftermarket.

 

Pricier but IMHO better would be a Detroit TrueTrac. It's a gear-driven limited slip that doesn't require special additives for the gear oil.

 

Both are full case differentials, which means they require professional (or advanced amateur) installation.

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I've only ever driven rear or 4wd trucks in the snow... and it gets moving better, i can handle the rear end kicking out. Preferred, actually ;)

I just put new meats on it a couple months ago and i picked them based on their "snow" rating... Not blizzaks, but they are highly rated in snow for an A/T. I definitely prefer LSD rear ends though..

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suit yourself. I prefer a vehicle that doesn't threaten to spin me around at every turn. :D

 

far as I know, trac loks were an option rather than standard with a certain package, so just about any rear axle could have one but few will. :( car-part.com might be helpful in your search. but always triple check that the axle the junkyard has is what you're looking for.

 

being 2wd, this could be a good time to upgrade ratios if possible. :thumbsup:

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Oh come on, that's half the fun =) It's what the skinny pedal and some counter-steering is for! So basically a JY find of a TracLok'd axle is almost going to be slim to none.. the local JY's don't even have any 2.5L jeeps laying around.

No gear changes until it gets a 5speed... already feel like I'm winding the poor girl out doing 55..lol

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Yep, trak-loks were an option in the rear axles. You probably have a D35 rear and that may make it tougher. I do not know of a way to tell if an XJ has a track-lok or not short of spinning the axles. The engine doesn't matter and in fact a 4.0 jeep stands a better chance of having the optional diff. Most 2.5's were more low-option.

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ever driven a 2wd posi truck in the snow? it's even worse. :(

 

I suggest a set of snow tires. :thumbsup:

 

Pete, I absolutely have to disagree with you on this. The two Comanches I've had on the road, as well as several Cherokees, have all been 4WD with limited slip diffs -- mostly factory Trac-Lok, but the red '88 MJ has a TrueTrac. I'm in snow country, and with the limited slip rear axle I almost never have to use 4WD. I won't own one that doesn't have limited slip -- got a new Trac-Lok in the box now, waiting to put into the used XJ I picked up for our daughter.

 

Snow tires, or decent all season tires, are a must, of course, but the limited slip in a 2WD will often make the difference between driving home and walking home. (Don't ask me how I know this ... I don't choose to discuss it.)

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I had a Trac-Lok put in the D35 on my 2WD MJ some years ago to help during the winters here in SE Michigan. I have been pleased with the upgrade and feel that it has improved the drivability of the truck in the snow. I also took the opportunity to lower the gear ratio to a 3.55... I had it done by Drive Train Specialists in Warren, Michigan. They also have a shop in Ionia... Not sure how far that is from you. I cannot remember the cost for the work, but they did a good job.

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I used to go out and seek out the unplowed roads in my 2wd open diff 88 with just 30" BFG ATs and a stickshift to make it happen. :dunno: had weight in the back of course, but nothing insane. maybe 150 pounds. never felt like I was lacking for performance.

 

my Dakota was a deathtrap with it's auto and posi and 31" BFG ATs.

 

to each his own, but I prefer open for the rear for its inherent stability and most importantly and from now on: an all-out snow tire. I can beat 4wds off the line with my minivan. :D it's like magic how well those tires work. :yes:

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Like magic in snow, just put some all-seasons/terrains back on if you're going anywhere near hot asphalt... ask me how I know. :doh:

 

Modern snow tires are so awesome you don't even need studs unless you're driving the ice roads. Snows on each corner will beat 4x4 any day. (unless that's 4x4 w/ snows!!)

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Just an observation. A good set of snow tires and a light foot on the gas pedal will outgo any other combo hands down. After every snow storm when I drive down the highway almost all the cars, trucks off the road are 4WD,

Every car that is upside down, on it's roof is a SUV.

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Well, i keep roughly 300lbs of sandbags centered over the rear axle with a wooden cradle i made, and last winter- although on 40% tread blizzaks- the thing wouldnt get going for the life of it. So new tires should help, but i know both wheels spinning will get it going much better.. time to seek out a shop i guess.

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Just to be anal and point it out, an m+s rating has more to do with tread block patterns than actual performance. A dedicated snow/winter tire will far out perform an m+s. That being said, unless you'll be getting down to (or below) 0°F on a regular basis, or deal with a lot of ice, you likely won't notice all that much... Despite all the people up here yelling about m+s not being "real" winter tires.

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