I have one on my truck. It was installed and adjusted according to the directions in the manual and it is dead nuts on.
I drove past one of those road side radar things at 30 and at 45 and it was perfect.
I got the abbott one, it is a little cheaper then the tru speed!
It is simple to program you just drive 10 miles and depending how far your odometer is off you set these little dip switches to the code in the book and thats it!
ive seen something about modifying the abbott box to change the cab to pcm ratio on dodgeram.org.
im just not sure where the abbott box is. and if that would correct the speed. basically i guess what the truspeed and probaly this thing does is just change a frequency that it sends the signal at. it the dodgeram.org article it lists using a new resistor, which is what a new resistor would do, change a frequency. anyhow im not quite sure how many of you'all have seen it.
you need acrobat to view this i guess.
Dubge, where do you find this controll, and does it take care of the tire change and the gear change or do you not have to worry about the gear change since the rpm is still correctly read but the tires are still wrong????
A forum community dedicated to off-road vehicle owners and enthusiasts. Come join the discussion about trail reports, builds, performance, modifications, classifieds, troubleshooting, drivetrain, and more!