1996 dodge v10 & Ford 1999 7.3

Tiger02 wrote:
EBPV into EB


Check out the link to diesel bombers forum. The Exhaust Back Pressure Valve (EBPV) can be used as an exhaust brake using the PDF write up found in the first post.

A similar, but likely different due to difference in model year, modification was done on my '97 7.3 F350. I don't know much about it. My transmission guy did the mod. It did work though, I got more engine braking when letting off the throttle. He did extensive valve body modifications and programming to the E4OD tranny as well, to increase transmission braking, when he rebuilt it the 2nd time.

The overall affect, I was very pleased with the truck's ability to use it's gearing to slow down and maintain speed on grades. It wasn't able to do so barely at all, before he worked on the truck. It was scary.

I was used to my other, gas engine F350, with C6 and 4.56 axle gearing, as well as the E350 diesel with 5R110 tranny. Both of those trucks had far better engine/tranny braking than the 7.3/E4OD had originally.

I don't know if Allison or anyone else makes an hydraulic fan retarder add-on for the Allison 1000 transmission in GM Duramax trucks or not. If one is available, that would be the way to go for anyone with a GM diesel.

The Williams retarder on the Allison MD3050 in my International truck works awesome at slowing the truck on grades. I hold the tranny in lower gears (2nd, 3rd, sometimes 4th, depending on grade and load) and stab the retarder once in a while and the truck creeps down any grade. Over-use of the retarder can overheat the tranny though, so I have to be careful and watch the tranny temp gauge.