they r both victory red 12 foot dumpbodies with electric ptos with 19.5 in alcoa wheels . the difference the one has a dmax with allison a 4. something gears, it has only 3500 miles ,both are 03s the pumpkin on the d max runs hot and is leaking black oil , the pumpkin on my 3500 runs hot so i stayed away from that one for that reason, and its gvwr is 16500 and gcw is 24000 the one i choose has the 8.1 325 hp allison 2000 with 4.88 pmpkin gears it runs cool no leaks and its a lot bigger and beefier than the other one its gvw is 17500 and gcw is 26000 and it was thousands of dollars cheaper than the other one and it has 4500 miles on it . my 3500 was constantly at dealer getting repaired and is still getting repaired i needed a reliable truck for my business . so far the c4500 has exceeded my expectations , it has a huge air filter and the air comes in from the side of the hood it acts like a ram , both motors really benifitted by that set up, id like to trade my 3500 in on a c4500 with a monroe pickup body on it ,

And the point of posting this in the "ask the techs" forum is???????:confused:

why do the rear ends heat up ?do they run hot , is that normal ?