Re: My U240 is a real hot-rod now!
Reply #6 –
Easy to tell if you have the exhaust brake.
It would be bolted to the turbo as the exhaust heads to the muffler. Raise the bed and look. If you only have a pipe (no "machinery") between turbo and muffler you do not have the exhaust brake.
Note, that does NOT mean that you have a retarder. But, if you crawl under the driver's side of the transmission and copy down the transmission number, Allison can tell you whether it has a retarder. I believe (don't know for a fact) that the transmission model number will end in R if it has the retarder.
With the U240, you do need to check your ride height and adjust if it is low. If you need instructions, let us know.
Brett