04 auto trans max torque

[Deed04]

Does anyone know what the torque limit is for the 48RE trans? Looking to do some upgrades but, very carefully.



Thanks

Deed04

 

[Farmall Hauler]

Hello,



I was thinking, if you are wanting to get an idea of what the max TQ of the 48 RE is. Do some looking in the threads with those who have performence boxes on their trucks. I've heard of a couple of people having good luck with these boxes and their autos. It seems that the 48 RE is much stronger than the previous 47RE!



Good luck!



Mark

 

[STEWARTL]

it seems to me i was told 780

 

[sag2]

The safe limit is 567 Lb/ft. By safe it means the limit that will make the trans last at least through the extended warranty period, and most likely as long as an owner could reasonably assume one would last under normal conditions (ie 100,000 to 120,000 miles)

Many exceed this amount, and the trans still holds up, but the bottom line is the more power through it results in more heat and stress, and reduced life.

 

[MCornwell]

sag2,



Is that Rear-Wheel or Input power? :-laf (really)



I ***-ume RWTQ



-Mitch

 

[sag2]

That is input. The 600 is torque managed to a max of 567. The 33 lb/ft loss is to account for accessory loads, A/C, fan, and generator. If the accessory loads are high, the engine is making 600 less the load. no loads, it is managed to the 567 max.

 

[RMcCulloch]

IOW, the 305/555 wouldn't be limited but the 325/610 would?

 

[sag2]

That's correct, the 555 is able to run full tilt, the 600 is torque managed. That being said, all 2003+ torque manage during shifts to save the trans.