Is J2807 worthless?
A recent thread was locked due to brand bickering. Before I got a chance to respond to the latest turn of the conversation. It was stated that J2807 a worthless standard by a few people... Primaril...
Forum Discussion
rhagfo wrote:brulaz wrote:
Like ShinerB, I would like to see more testing of the rigs ability to safely go DOWN a long steep grade.
IOW how much un-braked towed weight can the truck safely handle going down a standard grade? And while you're at it, make it a twisty one with 20mph hairpin turns separated by 35-45mph straights, not just an Interstate.
But I imagine there are many issues in designing such a standardized test.
Very good point!! How many post have we seen on the forum of a strong puller up hill, ending in a white knuckle ride down the other side!!!
My 2001.5 OEM just free wheeled down hills with the torque converter not locked up. Even after installing a smart controller and exhaust brake, the truck with the torque converter lock without the exhaust brake on, the Cummins held back very little on hills by it's self!. The V8 Fords and GM's seemed to do better with grade braking as it was called then.
Long live Exhaust Brakes!!!!
I wonder about newer direct injection gas engines without throttle plates?
Chris
