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$1,069.99
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members

Ford 9 Inch Gear-Style Posi Differential Premium Third Members

Ford 9", Limited Slip Differential Type, 1310 Yoke U-Joint Series, Standard Spool Weight

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Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
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Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
Ford 9 Inch Gear-Style Posi Differential Premium Third Members
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Part # 91050345
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  • Hand-assembled by our trained technicians for an unbeatable combination of quality and value
  • Precision assembly for the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth
  • Yukon gears with premium finish reduces friction, heat and provides for long wear
  • Nodular iron housing is stronger than OEM “gray” iron and has 4 lbs of additional reinforcement
  • Richmond Powertrax Grip Pro spiral gear differential gives positive traction without the noise of a full locker

Details

Differential Type:
Limited Slip
Housing Material:
Nodular Iron
Gear Ratio:
Select Spline/Ratio to see
Axle Splines:
Select Spline/Ratio to see
Yoke U-Joint Series:
1310
Yoke Width:
3-7/32"
U-Joint Cap Size:
1-1/16"
Spool Weight:
Standard
Ring Gear Weight:
Standard
MFG. Part #:
Select Spline/Ratio to see
Sold in Quantity:
Each
Gear Material:
Steel

Info

As featured on Classic Truck’s Week to Wicked. Watch the transformation here!

Assembled by Professionals

Hand-assembled by trained experts in-house, our Ford 9-inch third members are built from quality components with an exact step-by-step process. We bring this combination of precision assembly and quality components to you at a price that can’t be beat. We trust these third members so much, they’re the go-to choice for our own rides, from the street to the track. 

Tough, Nodular Iron Center Section

Our Ford 9 Inch Nodular Iron Third Member Center Section Carrier starts with a NEW casting with over 4 lbs. of additional material in critical areas. Nodular (ductile) iron is much more resistant to fracturing than OEM “gray” iron. Extra ribbing reinforces the case and rearmost pinion support (pilot bearing). 

Thick, forged steel bearing caps surround the carrier bearings, all securely held in place with precision Grade 8 cap screws. The improvements continue with rugged billet steel adjuster nuts and heavy-duty keepers to ensure your ring gear settings are maintained. All mounting surfaces are precision machined to ensure a consistent, flat surface for a positive gasket seal (no more leaks on your shop floor). An oil fill plug is included. 

Precision Assembled with Yukon Gears

Getting a proper pattern on the ring gear teeth is crucial. Our time-proven, step-by-step process ensures the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth. 

Our Premium gear third members are made with a tough-as-nails 10-bolt Yukon gear set, premium finished to reduce friction and heat, to give a long life and exceptional durability. 

To ensure a proper gear pattern, we use a stronger “Daytona” style pinion bearing support to maintain that critical pinion depth setting. Stronger due to its larger bearings, our Daytona pinion support also uses the spacer-and-shim setup to maintain critical pinion depth settings under high load, unlike traditional crush sleeves which often compress further, take out your preload and lead to failure. With solid bearing spacers and the proper shims, we eliminate this problem and make setting preload easy and repeatable during installation, service and gear changes. Since preload is already set, simply torque the pinion nut to 160 ft./lbs. and you’re good to go. The pinion gear is connected to our new, forged steel “Ford short”, 1310-type pinion yoke. 

Gear-Style Richmond Powertrax Grip Pro Differential  

For the ultimate in putting power to the pavement, Richmond Powertrax Grip Pro Traction Systems are the latest design in traction using 3 x 2 spiral gear technology. These differentials provide smooth, dependable operation combining a limited-slip differential with the strength of a fully machined, forged steel case. Because there are no friction plates, no friction modifier additive is necessary.  Always use a 80W-90 weight petroleum based gear oil with a GL-5 (or higher) rating, friction additive/modifiers should NOT BE USED.  Synthetic oils and oils containing friction modifiers are not recommended. 

Powertrax Grip Pro differentials are the ideal solution for just about any muscle car or truck on the road today. When you need that added traction so your muscle car puts power to the pavement instead of burning one wheel up, Powertrax Grip Pro limited slip differentials are your answer.

  • Latest Posi-Trac Design
  • Uses 3 x 2 Spiral Gear Technology
  • Comes Fully Assembled
  • Delivers Progressive & Variable Traction
  • Allows You to Control How Much Traction is Applied
  • Housed in a Fully Machined, Forged Steel Case

Proven Reliability

We run what we sell. Our third member units are the go-to choice for our own rides and we have built these units to last with high quality hardware and components. Tapered steel roller bearings minimize friction, better handle thrust loads and increase load carrying capacity. The ring gears are assembled with Grade 9 bolts with a tensile strength of 180,000 psi, a 15% increase over Grade 8 hardware.  Heavy duty Grade 8 carrier cap bolts, a lock-style pinion nut with pre-applied Loctite and high-quality grade 5 pinion support bolts make our third member near-bulletproof. 

Units include a Viton® pinion seal providing long lasting oil and chemical resistance. This seal retains elasticity up to 399°F (204°C) and intermittently up to 600°F (316°C) This high temp seal helps eliminate pinion leaks, reduces maintenance and keeps the third member properly lubricated. A carrier-to-housing gasket is available separately. 

Our hand-assembled Ford 9 inch third member assemblies are made-to-order. We keep a supply of the most popular gears in stock, with most units built within 2-3 days. Our third-member units are shipped in a durable, reusable poly storage case, perfect for keeping multiple gear sets stored and ready for the track.

Features

  • Hand-assembled by our trained technicians for an unbeatable combination of quality and value
  • Track-tested durability in our own cars – we race what we sell
  • Precision assembly for the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth 
  • Yukon gears with premium finish reduces friction, heat and provides for long wear
  • Nodular iron housing is stronger than OEM “gray” iron and has 4 lbs of additional reinforcement
  • Large bearing “Daytona” style pinion bearing supports for strength and reliability
  • Spacer and shim setup maintains critical pinion depth settings and easier to service than traditional crush sleeves
  • Richmond Powertrax Grip Pro spiral gear differential gives positive traction without the noise of a full locker
  • Ring gears assembled with Grade 9 hardware, 15% stronger in tensile strength than Grade 8
  • Viton® pinion seal, resistant to chemicals and high temperatures
  • Grade 8 Carrier cap bolts
  • Lock-style pinion nut with pre-applied Loctite®
  • Grade 5 pinion support bolts
  • Includes form fitted, reusable red poly storage case

Notes

Gear lube recommendations :

910-44090 - For street and every day driving under normal conditions

910-44140 - For extreme duty, towing or very hot climates

Warranties

No warranty is offered or made for durability or specific performance. No warranty is offered for commercial, off-road, street performance, or racing use.

Charts

Instructions (PDF)

Important Messages

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item 91050345 is made to order. It will be shipped from our warehouse when it is produced.
Some parts are not legal for use in California or other states with similar laws/regulations

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