I just installed a mag-hytec cover on my Dually D70 rear. It seems to me that filling it to the 6qrts that they claim it will hold now is not doable to the fill lines on the dipstick. I got about 5 1/4 or so in and its already past the top fill line on the dipstick. I did drive the truck around 3 miles or so and it stayed the same on the dipstick.Help me out guys who have installed this diff cover. How many did you put in and do you go off of the fill line on the dipstick? Thanks, Robert

 

Can't help ya on the fluid question... I've put a few on and just went by the fill line.. Didn't even see what the capacity was and they have been fine for the past few years..

Do you happen to have the part# on that cover.. Id like to get one for mine

 

Its simply a D70. Thats the part #. They claim though that it will take 6 qrts to fill though! Anybody else put one on?

 

i put the 6 qrts in it and i havent had a problem yet with it,i do love the dip stick and magnets though

 

At 6qts where is the full level on your dipstick? Like I said at a little over 5 qts I am already slightly over the top full line on mine. Thanks, Robert

 

uh i dont know,but i cant say for sure cause my seals leak like a sive no thanks to the guys that rebuilt the axle.so ill be fixin that soon

 

A limited slip differential (Posi) will take up more volume than an open differential. Or, a Limited slip will take less fluid to fill than an open differential. and 3/4 of a quart sound about right. mine was about 5.75quarts. However, with 3.07s the housing is a bit larger. Fill it to the line and forget it. and it WILL drop the temp a bit!

 

I try to keep my rear diff at the top line on the dip stick which is about 5.5 qts. I have had my Mag Hytec diff cover on for 7 or 8 years and have noticed something different but nice. Before I put it on a had axle seal failure about every 25 to 30 thousand miles. After the Mag Hytec cover went on I have not had a seal failure - the old girl went over 70K at which time I had the rear brakes done. I know the rear diff is well above the factory and recomended fill level. It would appear as if those seals are now getting enough lubricant to keep them from failing.

Bob

 

IIRC, mine took about 4 and a half quarts to bring the level just above the bottom of the axle tubes. It reads well over the marks on the stick at that rate, but that's because it is tilted back/up in a brokeback driveline/pinion setup.

It's all relative. The thing to remember is it'll be be spitting the excess into the brakes if you get it overfilled.

 

Alright, I will suck out some and put in my wear inhibator then fill to the top of the line. Thanks, guys.

 

How far out does the mag-hytec stick out, basically how tall is it if it were sitting flat?

 

So Bob, zeroing in on this Mag-Hytec fill level issue: Is your rear open or Power-Lok?

 

Power Lok. Dana 70.

Bob

 

Where is the best and cheapest place to buy one of the Mag-Hytec differential covers? And so it still roughly adds about 1-2 quarts of fluid gain over the stock setup? I do like the idea that the wheel bearings will be seeing more fluid outward toward the wheels and prolonging any problems there. Sounds like a good, intelligent modification to do if I don't want to happen to install a whole Dana 80 axle in the rear.

 

Bob. looks like we have same setup and I am running a quart less than you. No issues with leakage out through the axles?