Mag-Hytec

Why a magnet?

As the metallic components in transmissions and axles wear, they generate very fine particle debris that becomes suspended in the lubricating oil. A suspended magnet acts as a filter to contain these particles, keeping the fluid cleaner and extending component life. Periodic checking and cleaning of the magnet is recommended for maximum fluid service life.

Mag-Hytec® - Differential Cover

10 Reasons Why

  • Average of double the fluid capacity
  • Ease of Service
  • The dipstick is knurled for quick removal, the flat is marked low/high to check lube level and a magnet, which acts as an open filter is in the lower end. The MS 7/8 - 14 THD port is large enough to use for filling
  • The magnet-filled drain plug is the same MS port as the dipstick. Both the dipstick and drain are O-ring sealed
  • The sending unit fitting is 1/8 pipe THD and shipped with a stainless pipe plug
  • The calibration plug is centered on the serial number plate and approximates the stock cover fill plug for factory fluid level
  • The O-ring is snapped into the inverted "V" groove for a positive seal without gasket or silicone
  • Plugs, cap screws and washers are stainless steel in most applications
  • Mag-Hytec manufactures the best covers and pans available today

Mag-Hytec Pans and Covers

The primary reason I purchased this cover is because my stock differential cover didn’t have a drain plug. Since I had to pull the cover off to change the fluid, I decided to spring for this cover and make future fluid changes much easier. The added fluid capacity is nice, but there’s a catch. From everything I read online, the basic rule on differential fluids is to never fill above the stock fill plug. With this cover, I got one additional quart into the diff (4.5 qts) before the fluid started pouring out the stock fill plug (located on the axle). Turns out the only way to get the full advertised amount of fluid (6 qts) into the diff is to cap the stock fill plug and use the full plug on the cover.


All Mag-Hytec pans and covers are cast A356-T6 aluminum and have O-rings that seal the pan/cover to the housing instead of using a gasket. The differential covers feature a dipstick that does not get in the way of any differentials or gear ratios.

Increase Capabilities

Increase the fluid capacity and cooling capabilities of your rear differential while adding some style with this replacement differential cover from Mag-Hytec. Not only does this cover hold 8 quarts of oil while featuring finned aluminum construction for heat dissipation, but it has a magnetic drain plug and dipstick for easy maintenance.

Mag-Hytec