B is generally considered the service cycle for commercially use and A is considered for personal daily driver use. Taxi cab versus commuter vehicle.

If you didn't dunk it under water, i'd change it once after break-in and forget about it.

I found our 8.25 rear cover gaskets at Advanced autoparts for $3.33 but what front differential do we have They don't list amy liberty parts

EDIT Never mind I just found it, the front has drain and fill plugs

Hey Joe... is that gasket from Advanced a reusable steel core gasket like the lubelocker ones? Not trying to have a food fight over who's gasket is better, just would like to see how the one from Advanced compares to the lubelocker one. I know the lubelocker goes on "dry". No need for any gasket sealer compound and I can confirm it is reusable as well.

...and went to synthetics and am going with 50K changes after that.

It does not say but it's a Fel-Pro brand and is blue so I "assume" it's a one shot deal But for the price and locally available it's convient

At least there is a choice out there!!

I found our 8.25 rear cover gaskets at Advanced autoparts for $3.33 but what front differential do we have They don't list amy liberty parts

EDIT Never mind I just found it, the front has drain and fill plugs

Hi Joe,

Is it a Dana 30 in the front?

- Chris

Unfortunately, I fall into the severe service category living on a farm, driving dirt roads, towing fuel trailers, and off road checking on fences, cattle, etc.

I changed mine out at about 5K and went to synthetics and am going with 50K changes after that.

Either way you go, FORGET THE RTV on that 8.25 rear axle!!!! Use a gasket! I got a couple from

www.lubelocker.com

I have even reused them before with good results. Sure makes messing with the RTV, as a teenage would say, "So 20th Century". Of course, if you like scraping off the old RTV, applying the new, waiting for it to set up and then hoping it won't leak.... then by all means have fun with it. I've got better things to to than waste time on a rear end. I can just unbolt, pry off the cover, drain, reuse the gasket and bolt up, fill up, and I am done.

I know I may get a argument, but using a good synthetic and extending the drains will not void a warranty. Unless you tell them you are doing crazy things, then how would they know you are in the severe service catagory anyway. The MM warranty act of '75 does not allow them to legally deny warranty just because you do your own work, use other oil products, or even extend the drains unless it it shown that the oil caused the problem. It is always important to keep good maintenance records. heck, you are using a computer, how difficult is it to set up a simple spread sheet and log the maintenance? having those good records also will allow you to negotiate a better trade in value (as per the automobile dealers association quidelines). I am sure that I am the exception because I have a myriad of vehicles and equipment that I use for business and pleasure, but it is so simple to keep accurate maintenance records that I even keep one on my John Deere lawn mower.