Differential covers 101
PU Truck mag That answered a lot of my questions about these covers. Extra large ones may not make a lot of sense because they disturb the oil flow in the housing.
Forum Discussion
charwan wrote:bobsallyh wrote:
Over the years I've been a fan of looking at rear ends, but not finned aftermarket covers.....
I was a Ford mechanic for years and worked on many a rear end....Never saw but one rear end burned up....Waste of good money.
Some of the aftermarket extra volume covers may be more marketing hype than engineering need. However, if you look at RAM 3500's with the HO package (or maybe it's the dually models?!?) they come from the factory with the AAM aluminum finned cover....the exact same one I installed. I would guess RAM assumes you're going to tow/haul heavy loads with these 3500 trucks and want to ensure you keep the rear diff within acceptable operating temps.
I have times where I tow right up to my max, so I'd prefer to have the extra cooling to make sure I don't have excess heat issues.
KJ
