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All NEW Ford 9 Inch Third Members, Full Spool, 31-Spline

Specs
Sold in Quantity:
-
Spline Count:
31
Hazmat Flag:
No
Housing Material:
Cast-Iron
Gear Ratio:
-
Garage Sale:
No
Ring Gear Weight:
-
Differential Type:
Full Spool
Spool Weight:
-
All NEW Ford 9 Inch Third Members, Full Spool, 31-Spline
All NEW Ford 9 Inch Third Members, Full Spool, 31-Spline

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Details

Reviews

Q & A

What's in the Box

Our completely NEW 9" Ford third members start with an aftermarket heavy-duty cast iron carrier featuring a new cast iron Daytona pinion support and larger bearings. Then we use your choice of a standard (8.9 lbs.), lite (6 lbs.) or megalite (5.55 lbs.) steel full spool.

Each is available with your choice of 3.50:1 to 7.33:1 gear ratio ring & pinion. Also includes NEW bearings and Viton high-temperature seals. Professionally assembled for oval track race use and shipped in a re-useable plastic storage case.

Third members are made to order. Please allow 24-48 hours for order to ship.

Available options include a yoke to accept 3 1/4" Chevy/GM U-joint (add 91048339) and lightening of the ring gear to remove weight (add 91600013).

Warranties

WARNING: Circle track racing applications require a minimum of 4 qts. of rearend lube. Using less than this amount will lead to immediate pinion failure.

You may also be interested in:

Ford 9 Inch Third Member Assembly, Full Spool, 31-Spline
SKU-91048343
                        
  • Professionally assembled for oval track racing only
  • Includes Pro Gears ring & pinion
  • Your choice of gear ratio, 3.50:1 to 7.33:1
  • Includes 3-5/8" stock Ford yoke
  • Viton high heat pinion seal
  • Solid pinion bearing spacer with shims
  • Plastic storage case

910-48343 Instructions (PDF)

Third members are made to order. Please allow 24-48 hours for order to ship.

Order applicable spool:

  • STD = Standard
  • LITE = Lightweight
  • MEGA = Megalite

Available options include machining of the yoke to accept Chevy/GM U-joint (add 91048339) and lightening of the ring gear to remove weight (add 91600013; 5.37:1, 6.66:1, 6.83:1, 7.00:1 ratios are already lightened).

Option - Yoke for 3-1/4 Inch U-Joint w/ 1-1/16 Inch Caps
SKU-91048339
                        
                    
Option - Labor to Lighten 9 Inch Ring & Pinion
SKU-91600013
                        

This labor option is only available on Ford 9" ring gear when you purchase your new ring and pinion. A 5.43 ring gear comes out 2.6 lbs. lighter. Other ratios may vary. 

Made to order, will ship 24-48 hours after receipt of order.

Fel-Pro Gaskets P2302 9 Inch Ford Pumpkin Gaskets
SKU-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.