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View Full Version : Installed Mag-Hytec rear diff cover



upsguy
09-25-2006, 20:17
Installed Mag-Hytec rear diff cover yesterday and filled with 75w90 Mobil 1 synthetic. It took about 7qts. and 20 Oz. to fill it to within a hair of max. fill line on dipstick. It sure is nice to be able to check fluid level with a dipstick.

I didn't think about it at the time, but should you check it hot or cold? Because if it should be checked hot then it's going to be overfilled.

There's two brackets, one held on by the stock bolt at 12 o'clock that holds a break line and what I think is the ebrake cable that runs over to passenger rear wheel. The other is the bolt that is to the left of that one and it holds a fitting that looks like several brake lines attach to it. This is where I ran into a little problem. The Mag-Hytec cover doesn't have a bolt at the twelve o'clock position and I couldn't get the bracket to slide down far enough to get it to the next hole to the right. So, I left it loose. The new cover is about 7/16 inch thicker than the stock, so the bracket kind of snaps over the cover and stays there. Do the earlier models have these brackets? If so, you'd think mag-hytec would have taken this into account.

Also, I don't know why they put a drain plug in the cover when there's already one in the rearend.

Anyway it's on there and I've got almost 8 quarts of clean fluid in it. I only had about 1600 miles and about 200 towing, but the fluid was black, black, black, and there was at least a 1/16" of metal past on the drain plug.

Between soccor and baseball games and dove hunting, I didn't get the tranny pan on there. I don't know whether to go ahead and do it or wait until I get more miles on the tranny fluid? Maybe I'll wait until my first service interval and do it when I put on new spin on filter.

DA BIG ONE
09-26-2006, 03:23
Installed Mag-Hytec rear diff cover yesterday and filled with 75w90 Mobil 1 synthetic. It took about 7qts. and 20 Oz. to fill it to within a hair of max. fill line on dipstick. It sure is nice to be able to check fluid level with a dipstick.

I didn't think about it at the time, but should you check it hot or cold? Because if it should be checked hot then it's going to be overfilled.

There's two brackets, one held on by the stock bolt at 12 o'clock that holds a break line and what I think is the ebrake cable that runs over to passenger rear wheel. The other is the bolt that is to the left of that one and it holds a fitting that looks like several brake lines attach to it. This is where I ran into a little problem. The Mag-Hytec cover doesn't have a bolt at the twelve o'clock position and I couldn't get the bracket to slide down far enough to get it to the next hole to the right. So, I left it loose. The new cover is about 7/16 inch thicker than the stock, so the bracket kind of snaps over the cover and stays there. Do the earlier models have these brackets? If so, you'd think mag-hytec would have taken this into account.

Also, I don't know why they put a drain plug in the cover when there's already one in the rearend.

Anyway it's on there and I've got almost 8 quarts of clean fluid in it. I only had about 1600 miles and about 200 towing, but the fluid was black, black, black, and there was at least a 1/16" of metal past on the drain plug.

Between soccor and baseball games and dove hunting, I didn't get the tranny pan on there. I don't know whether to go ahead and do it or wait until I get more miles on the tranny fluid? Maybe I'll wait until my first service interval and do it when I put on new spin on filter.

Be advised, there is a "fill" reference hole on back of cover on serial # plate, it requires an allen key for removal/install, this is where you should determine proper level to avoid blowin diff lube out of diff at highway speeds once heated up resulting in oil soaked underbody. Once, the proper level is found mark your stick accordingly with file mark.

Any lines holding brake lines/parts should be reworked to fit properly.

If perhaps you run a rear fuel tank inplace of spare tire diff cover may rub fuel tank skid plate if one is installed.

Mag Tec is worth every cent IMHO, enjoy!