Can 40lbs rears handle a high powered cat?

So a 10 speed trans mounted to a 600hp engine is more likely to fail than an 18 speed?

If I'm hauling 80k lbs or less would a 475-530hp with a 10spd and 40k rears be better? If I want better fuel economy with that setup would 2.64 or 2.90 rears be better?

Ethan

 

we have a 96 t600 with a super10. it eats rear ends for dinner. driveline and joints have yet to fail since i've been around.
don't know about BEFORE i came to this company.

 

If I am not mistaken, a 10spd is more durable than a 13 spd.

Sounds like someone is not assembling the rears correctly or there is other underlying issues.

 

The first 2 numbers in a transmission's nomenclature will tell you how strong it is. It had nothing to do with how many speeds it has.

RTLO16.....

The 16 means it can handle 1600 pounds of input torque, expressed in 100's.

As for 40's failing, it depends on what part is failing. The input shaft is subjected to the engine's torque, but the rest of the diff is subjected to the load. A faster ratio is also weaker than a slower ratio because of how much metal there is between teeth. 4.11's can handle way more stress than 2.64's for instance.

 

I think you'll be just fine. I never get in the 140 range but I gross out between 110 and 120 alot and I have 34k rears. Their going to break one of these days but after putting over 1.15 million on them they dont owe us anything.

 

Just being nosey superhauler but what kind of triler set up do you run?

 

It all depends on WHICH 13spd it is..... And I was thinking more along the lines of trying to shift 140,000# with just 10 gears. It would seem like the gap in RPM's would put a lot of stress on a driveline that way. Having 13 or 18 would seem the better choice. I've seen Heavy Haul guys running direct drive 10's blow out a driveshaft going from 1-2-3, but a friend of mine had a 9 spd and hails even bigger stuff????

 

55 ton trailking with a stinger axle.(3+1) 4 axle truck.

 

Ive heard of guys hauling super-b's in BC with 8LLs. Definitely not what I would choose.