Ford 9 In. 3rd Member Assembly 28 Spline Mini Spool 4.11 Gear Ratio

Description

All assemblies are hand-assembled by our trained technicians for an unbeatable combination of quality and value, The ring gears are assembled with Grade 9 hardware, which is 15% stronger in tensile strength than Grade 8, Gear units are built out of long-wearing 8620 cold-rolled steel, Spacer and shim setup is maintains critical pinion depth settings, Nodular iron housing is stronger than OEM “gray” iron and has 4 lbs. of additional reinforcement
Ford 9 In. 3rd Member Assembly 28 Spline Mini Spool 4.11 Gear Ratio
Sku # 91048340-411
Mfr. Part # 91048340-411
Condition
New
Brand
Speedway Motors
Sold
Box
Details
Notes
Circle track racing applications require a minimum of 4 qts. of rearend lube.
Using less than this amount will lead to immediate pinion failure.
Available options include:
Yoke to accept 3 1/4" Chevy/GM U-joint (add 91048339)
Lightening of the ring gear to remove weight (91600013) - ratios 4.78, 5.25, 5.37, 5.50, 5.57, 6.14, 6.66, 6.83, 7.00, 7.16, and 7.33 are already lightened). The letter "L" behind a ratio in the selection also indicates the availability of a lightened ratio.
Third members are made to order. Please allow 24-48 hours for order to ship.
Info
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 For Proper Ring Gear Teeth Pattern
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.
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 units are built from long wearing, tough 8620 cold-rolled steel.
We offer lightened gear assemblies from 5.29:1 to 7.33:1, select the "L" option (example: 529L) from the gear ratio selection.
Premium Mini Spool
Our mini spool assemblies have premium, forged 8620 steel 28-spline mini spools, with a chromoly cross pin, and are built with a larger diameter for greater durability. We offer gearing from 3.50:1 to 7.33:1. Mini spools are a great option for restricted class racing and saving money.
Proven Reliability
We race what we sell. Our third member units are the go-to choice for our own rides and racecars 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
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
New, forged steel 1310-type "Ford short" pinon yoke
Spacer and shim setup is maintains critical pinion depth settings and easier to service than traditional crush sleeves
Choose mini, or full-spool with full spools available in standard, light and mega-lite configurations
Gear units built of long-wearing 8620 cold-rolled steel, lightened gear options available
Ring gears assembled with Grade 9 hardware, 15% stronger in tensile strength than Grade 8
28-spline premium mini spool
New chromoly cross pin
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
Charts
(PDF)
WARNING: Cancer and Reproductive Harm -- p65Warnings.ca.gov
Specs
Sold in Quantity
Each
Gear Material
Steel
Ring Gear Weight
Standard
Differential Type
Mini Spool
Spool Weight
Standard
Yoke U-Joint Series
1310
Housing Material
Cast-Iron
Weight
82.1
Axle Splines
28
Gear Ratio
4.11:1
MFG. Part #
91048340-411
Notes
Circle track applications require minimum 4 qts. rearend lube.
Reviews
64 ford
Rated
by Da beast on March 13, 2021
Summary:
Third member works great.
Yes, I recommend this product.
Fast shipping
Rated
by Da beast on March 05, 2021
Summary:
Fast shipping on my Ford 9-in housing works great
Yes, I recommend this product.
very good part worklngwill
Rated
by steve on June 20, 2020
Summary:
building pro street car
Yes, I recommend this product.
Yes
Rated
by Eddie on February 12, 2020
Summary:
Looks like professional job and I think it will work great in my 70 mustang.
Yes, I recommend this product.
Great Product
Rated
by 47 Racing on August 05, 2019
Summary:
Use this in my street stock car and works great. Top 2 bolts are little hard to get a wrench on but overall very pleased.
Yes, I recommend this product.
Related Items / Suggested Parts
Yoke Option for 3-1/4 Inch U-Joint with 1-1/16 Inch Caps
Ford 9 Inch Third Member Assembly, Full Spool, 28-Spline
All NEW Ford 9 Inch Third Members, Full Spool, 28-Spline
Fel-Pro P2302 9 Inch Ford Pumpkin Gaskets
Lubrication Engineers SAE 90W Gear Oil, 1 Gallon
Rear Axle Breather, AN4 Bulkhead
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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