40k rears, Super B and BC mountains?

Synthetic

 

You are right, to be safe go with a tri-drive set-up, or at least 46,000 tandems. It is expensive for even rebearing a set of Eatons or Rockwells prior to failure as a maintenance item. And if they fail and blow up, you are close to a second mortgage on your house, even at a shop you know and trust. I knew this, and did the rebearing route on my 46,000 2- speed Eatons before any issues arose, and had over 1,000,000 kms on the truck when I sold it, with excellent oil samples all along...

 

Actually, nothing wrong with that as a road truck, especially if you are planning on heavier weights such as tridem or super b, or heavy haul. If it's not crazy heavy after you would strip off the winch and possibly the steel headache rack if you have one on it and put back an aluminum one, it might work. At least you would have a truck you know, not someone else's used truck. If you could pare it down to around 10.000 kgs tare weight, then hook to aluminum trailers, you should be good to go... And tri-drives are legal all across Canada now under TAC, and always have been in the U.S.. Good luck..

 

We used to do it with 1200ft/lb transmissions and 38,000lb rears. Fill them with synthetic and pull the wires off the temp senders. If they’re not blistering the paint off the housings don’t worry about ‘em.

 

I think this fellow is being sarcastic... I sure hope so..

 

I ran mountains all last summer with my Pete pulling hopper btrains, malt barley to the beer brewery in Creston or to Vancouver, then up the mountian in to Trail for fertilizer and back out, 63500 all the way. My trucks got 46k eaton rears with 4.10 gears, 18 speed eaton trans and a isx15 550hp. Pulling Btrain weights I'd have to stop half way up the mountian out of trail every time because my rear's were getting to the danger zone for temp's, every 3 runs I'd have to drop the diff oil because it would be burnt black as tar by then. I ran 75w90 synthetic and 80w90 conventional shell tried them both with same results and seeing as how synthetic's far pricer I just went to conventional for cost savings. Running BC pulling b-train bulker's is hard as hell on your truck no if and's or but's about it. If your pulling b-train flat decks you'll be totally fine unless your say fully loaded with sticks or something. Just be prepared to up the maintenance on your truck significantly running B.C.. rule of thumb for reliability "oil's cheap, rebuilt's aren't!"
On a side note, in summer police are freak'n every where in B.C. you'll often come around a corner and in to a check stop with little to no notice. So be careful and play it safe. Also when night driving you'll have a high probability of finding elk or deer on the road around blind corners!.....found that one out many many many many times. Another note weight scales are open way way more often then they are in the prairies, usually all day until dark. Crow's nest pass scale I've found was often open well into the night.
The peterbilt sales rep definitely gave you the real run down of the difference between super 40's and 46's, unless your doing serious heavy haul 46's aren't needed, they're just a tougher housing than the super 40's.

 

If you're running quads or super b's logging in the BC interior you'll definitely want the heavy housings. Those bushroads will beat the tar out of your truck lol.