Installing Mag Hytec Diff Covers
08-24-2006, 05:50 PM
#16
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I just purchased 10 quarts of Amsoil 75w-90 syn gear lube. They also had a 75w-140 syn gear lube, this was also $3 more expensive then what i bought. What is the difference between the two? She i go with the 75w-140? The guy at Napa could not tell me. I do not believe that i have a LSD diff, so i wont be adding in any friction additive, is this the right move? Thanks for the help
08-24-2006, 06:25 PM
#17
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If you tow heavy or live where it is hot (or both), 75W-140 is recommended.
That being said, it is hot down here, but I have been too lazy to change mine out from the 75W-90
~Rob
That being said, it is hot down here, but I have been too lazy to change mine out from the 75W-90
~Rob
08-24-2006, 06:50 PM
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Thanks, it is only hot maybe 3 months out of the year at most up here and i dont tow anything at all, just a snowmobile trailer. So it sounds like what i got will suit me right. Thanks again
08-25-2006, 07:26 AM
#19
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Originally Posted by CTD2001
I do not believe that i have a LSD diff, so i wont be adding in any friction additive, is this the right move?
Take your VIN # to a dealer and ask for a 'build sheet', if you are not sure. Will tell you all options on your truck...from the factory. Should be free and nice to have if you bgt used.
75w-90 is just right for Me. weather, no heavy towing. I've been up there in the summer and my diff. gauge never got over 140*. Down here, a normal summer day starts at 160* and climbs from there based on speed & load.
Difference is a 75w-140 will be thicker at operating temps.
RJ
08-26-2006, 06:32 PM
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I got my covers put on this afternoon, they look awesome!! Putting them on was so simple. For the front, i did have to drop the tie rod on the drivers side, but that was the only thing i needed to do. I really like the dipstick feature. My dad liked them so much, he is ordering up a set for his truck on Monday, hes got a Dana 80 and a Dana 60. Thanks again for the helpful information.
11-10-2009, 04:43 PM
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To be precise
I used Amsoil gear lube 90 wieght in mine and my rear 80 used about 7 quarts and the front was roughly 4 quarts (if I remember right). The cool thing about the Mag Hytecs is they have a dip stick, so just fill til it shows full, no need to do the finger test. Also the dip stick and drain are supposed to be 30 inch lbs not ft lbs. Whereas the bolts are in ft lbs. Trust me don't make that mistake.
Oil level dipstick should be tightened to 30 in. lbs.
Drain plug also 30 in. lbs.
Allen cap screws for the cover itself: 12-16 ft. lbs, in a "cross tight" pattern.
By the way, I originally tightened the Allen cap screws by mistake to 30 in. lbs, and there was no oil leak even then.
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