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Founder, 1929-2014
Speedy Bill
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Ford 9 Inch Grand National Rear End

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Ford 9 Inch Grand National Rear End
Ford 9 Inch Grand National Rear End
Ford 9 Inch Grand National Rear End

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Q & A

What's in the Box

MB Mittler Bros. Machine & Tool rear end is available in a 60" or 62" centered width. Includes housing, two 31 spline axles, two 5 on 5" steel hubs, two drive plates, two .810" x 11.75" rotors, and two rotor adaptors with bolts, bearings and seals.

Item Details

60" center width

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Seal-It Billet Aluminum Inner Axle/Housing Seal, 2.625 ID
(Part #9190951-2.625)

High cornering forces can force the gear lube out of the center section and down the axle tube leaving the ring and pinion high and dry! This billet aluminum seal has three O-rings that seal it to the axle tube and two bonded, heavy duty, neoprene inner seals designed to compensate for any amount of axle shaft runout. Keeps gear oil in the center section. These seals will take up to an 1.5” diameter axle.

  • Anodized billet aluminum
  • A must for cambered rear ends
  • For 9" Ford Grand National and Quick Change type housings
  • For up to 1.5” diameter axle
  • Keeps gear oil in the center section
  • Outside Diameter: 2.56"
  • Overall Length: 1.50"
  • This seal will fit our steel wide 5 axle
  • Choose housing tube I.D. size needed:
    • 2.500" - Gold
    • 2.562" - Blue
    • 2.625" - Red
    • 2.750" - Silver

919-0951 Instructions (PDF)

Fel-Pro Gaskets P2302 9 Inch Ford Pumpkin Gaskets
(Part #3442302)

Lose the RTV silicone! With Fel-Pro reuseable third member housing gaskets, you don’t have to worry about applying an RTV and waiting for it to set up to seal. In addition, installing precut Fel-Pro gaskets helps eliminate the risk of contaminating the differential housing with RTV.

Gaskets have a steel core and non-stick coating.

Lubrication Engineers SAE 90 Weight Gear Oil, 1 Gallon
(Part #91044090)
                        Whether you're running a stock flattie and rearend or hopped-up overhead and quick change, you need to run a good gear lube. Remember that your rearend was designed fifty plus years ago and needs all the help it can get. 

The biggest improvement you can give it is a lubricant that will allow the gears to survive the highway speeds that cars see today. L.E. gear oil is what we use in our 350 mph streamliner, that uses a V-8 quick change, without failure. The "red stuff" provides superior lubrication for long gear life. You can't win if you don't finish. We suggest 90 weight for the street and 140 weight for extreme uses.

  • Formulated using blends of high quality paraffinic and synthetic base fluids
  • Contains a highly shear stable tackiness
  • Unique blend of base fluids and thermally stable EP additives
  • Separates readily from water
  • Contains non-silicone defoaming additives
  • Contains no solids
  • Contains DUOLEC LE's proprietary dual acting liquid wear-reducing and extreme pressure additive
LE Gear Oil Performance Data Sheet (PDF)

LE Gear Oil Safety Data Sheet  (PDF)