Borg-Warner 1354 Strength?

[Diff Whack Daddy]

How durable are thes T-cases? I was curious if they would be able to handle a Klune V planetary doubler (2.72:1) in front of them while pushing 4.56 gears and 35" tires? I know, why? I am exploring all my options before I end up $20,000 dollars in debt on a 7 year old truck?(stole that line from my wife

 

[Ray Lobato]

Kevin,
Doesn't that go inbetween the T-case and the tranny? Is there enough room to do that? Do you really want to do that to a chain driven T-case? Why not just get the AtlasII with a 4.2:1 lo gear. oh wait, you have a auto tranny don't you? I think your brakes wouldn't be able to stop it if you went too lo. That's why I went with the 3.8:1 lo gear. With the 4.2:1 lo gear I wouldn't be able to stop the truck. With that 2.4:1 in the T-case and the 2.72:1 in the doubler, you probably wouldn't be able to stop your truck. Correct me if I'm wrong.

 

[Paul Gagnon]

Ray, Advance Adapters' warning probably has a lot more to do with liability issues than off roading issues.

 

[Ray Lobato]

Paul,
So what you are saying is "that ain't nessesarly true".
It might be able to hold it back.
Kevin,
I guess you could always try it and see.
How much is the doubler?

 

[Paul Gagnon]

I don't know Ray it may not be able to stop it. WhatI am saying is that it may not be an issue. I know people who have crawl ratios of between 80:1 and over 200:1 and I have never heard the complaint that they couldn't stop the truck with their brakes. My guess is that when you are going that slow you have lots of time to react.

 

[Rick]

This is what I have found. When decending a VERY steep hillwith a manual tranny in 1st gear and 4.3:1 low range, I cannot stop the truck on the hill without pushing the clutch in. It used to be that I could stall the engine by pushing hard enough on the brakes.

With an automatic tranny this could be dangerous if you wanted to come to a complete stop on a downhill slope. I don't know for sure, maybe the torque convertor would alleviate the problem, maybe it would make the problem worse due to it's torque multipication. Worst case you would have to pop your tranny into neutral in order to come to a complete stop.

 

[Diff Whack Daddy]

The Klune V is in the 1200-1500 dollar range. I prefer this over the Atlass because you retain your stock low range. Low/Low is great, but it isn't always needed or the right gear for the task at hand. This way I would still have a medium range gear. If I were to do something like this, even an Atlas, I would upgrade the brakes. Large disks in the rear w/ front brake calipers, and larger disks in the front w/ dual piston or four piston calipers. The ABS would be bypassed and an adjustable brake proportioning valve would be installed. If that doesn't stop the truck, I'll add one of those T-case mounted parking brakes and modify that so it works in conjuction w/ the brakes. I don't think I'll have to go this far due to the slip in the torque converter at idle, but by the time I do all this it will have a little trailer to ride on.