Standard output tow ratings

[Rosco]

Why is it that all the literature I read has the standard output diesel rated to out tow a high output diesel. To me shouldn't it be the opposite. I have a standard output so I am definetly not complaining I just don't understand

 

[KCJackson]

Short answer: the 6-speed weighs a lot more than the 5-speed or 47RE.

 

[Rosco]

Thanks, that would make sense to me. Now do you think with the arrival of the 48re tow ratings will go up or stay the same as a 47re.

 

[KCJackson]

The 48RE weighs more than the 47RE, so expect a similar drop for otherwise identical trucks. The 48 went back to a cast-iron casing over the aluminum 47, from what I've heard.

 

[Rosco]

Well I hope the 48RE will be a bolt in replacement for the the 47RE so when transmission replacment/rebuild time comes around I can upgrade. I know it's supposedly a beefed 47RE so bolt patterns should be the same I just hope electronically it will work.