Originally Posted by brian2sun

Well, you could do a lunchbox locker (aka Aussie or Lockright) in the front and they are ok to drive on pavement in 2wd. They won't lock up if there isn't any power going to the ring and pinion. But once you put it in 4wd, it will try to lock up whenever you give it gas so steering in 4x4 will suck whenever you're on the gas.

Originally Posted by FoneRunner

Thats why I ruled those out. I really have to be able to use the 4wd in the snow or ice so a lunchbox locker wouldn't work. Thats why I mean ARB or LSD are the only real choices...

Originally Posted by AddictedOffroad

Yukon should have a Zip Locker available for the 7.5 in a few more months. Its basically an ARB knockoff that is $150 cheaper. I have installed several 8" versions into customer's rigs to date with good results.

Originally Posted by brian2sun

One thing I considered when deciding between the ARB and the Trutrac was the stress they put on the components. While it's true that a an ARB fully locks the diff (becomes a spool) and that is harder on the CVs and everything, it's really only that 1% of the time, in those really sticky situations that it's in the "danger zone". The other 99% of the time, it's fully open so no different than stock.

What hasn't been mentioned and why I chose the ARB over the Trutrac is that the Trutrac doesn't fully lock so you run less of a risk of snapping a CV or other damage when your in those 1% of the time, hairy situations (like mentioned above). What wasn't mentioned was whenever you're in 4x4, the Trutrac has more resistance and puts more stress on the components. Yesterday for instance I was in 4LO for ~6 hours straight, but My front diff was open the entire time because I didn't need it locked for the wheeling I was doing. However, if I had a Trutrac up front, I would have been putting more stress on my components the entire time. Whether it's enough to break a CV in a day or 2 of off roading, I don't think so. But the stress it creates, especially in 4LO, over time can't be as good as running your diffs open.

Originally Posted by maclean216

part number or code - 911A342 -FRONT
MIT in El Cajon, CA did the install.

Originally Posted by maclean216

One big problem I have recently noticed is climbing large ledges. The Trutrac won't lock up leading you to have to use more skinny pedal, to try and bump up. Which can lead to snapping CVs.

Originally Posted by LINY4Runner

This can be overcome with light application of the brake pedal (which is pretty standard for anyone who wheels rocks in an automatic) tricking the LSD into thinking that both wheels still have traction, and sending power to both.

Originally Posted by maclean216

I am aware of that and maybe its my tires, but I am having a problem climbing steep rock ledges.

Originally Posted by maclean216

I think its for manual hubs vs ADD. But I have push button multi-mode transfer case. ***EDIT*** That was the part number off the invoice in 2006. Not sure how accurate it really is. I would call the tech line if you had a question.