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West Coast Classic Cougar is proud to offer a wide variety of limited slip or traction locking 8" and 9" rear end center sections, third members, or 'pumpkins' in over 40 different ring and pinion ratios. Our Ford third member specialist has over 30 years of experience setting up ring and pinion gears and rebuilding for stock and high performance applications.

Built from standard (2 rib, 1967 and newer style with fill plugs) 8 inch, and standard 9 inch center cases. Nodular case, aluminum case, or WAR case also available for the 9 inch. Ford 4 pinion traction locks (Trac-Loc) available reconditioned or new. Eaton True-Trac lockers, available new only. True-Trac's are clutchless, and have 8 parallel pinion gears. These have zero drag on turns and there is no 'ratcheting, locking and popping' like on Detroit Lockers and Detroit Soft Lockers. The Eaton True-Trac is highly recommended for street and road racing use. Reconditioned Trac-Locs will have all new clutches and steels. Trac-Locs are also shipped with a bottle of Ford Motorcraft friction modifier additive for the gear oil and a housing gasket. The Ford Motorcraft labeled friction modifier meets or exceeds the original ESW-M2C-104-A (C6AZ-19580-C) properties in the original formulated lubricant. A friction modifier must be added to all Trac-Loc units, even the old one in your car.

A 6 month warranty on all rebuilt Trac-Locs, new Trac-Locs, and True-Tracs. That is six months from the installation date. We recognize that project cars and restorations take time, and these parts must be purchased in advance of that first cruise around the block. New Trac-Loc and True-Trac limited slip units are also available. Available for the common, and desired, 28 splined axles or 31 splined axles. Daytona pinion supports can be installed too. Comes complete with your choice of 1310, 1330, or 1350 yoke. Center section cases painted either period correct red oxide, or black to match your rear end housing. All third members are assembled from used center section cases, yokes, and pinion supports. Both the center section cases and yokes are glass beaded and painted after passing inspection for wear or damage. Anyone with 400Hp or more must step up to the Nodular case.

To properly build a locking third member that is going to 'bolt in' to your car we need to know exactly which yoke that your car has installed. Our shop has come up with a foolproof way to measure your existing third member yoke. Measuring from the metal ring behind the yoke measure the distance to the end of the yoke. Possible measurements are either 3-1/2 or 4-1/2 inches.


 

We also need the measurement for the U-joint caps on your yoke. The measurement choices are 3-1/4 or 3-5/8 inches.


 

Used 9 inch Nodular or "N" cases, with selectable casting date codes (1962-1970 only), available upon special request. Premium upgrade with multiple choice of a wide range of cast date codes. This option includes a correct C5.. marked Daytona pinion support and correct 'Daytona' yoke. These can be ordered with rebuilt Detroit lockers upon request. Our supplier has a fairly large, but limited selection, of original nodular iron cases, with and without the cast "N". The nodular iron case would have been standard on GT-E's, 428 Cobra Jet's, 429 Cobra Jet's, Boss 429 Mustang's, and Boss 302 Eliminator's and Boss 302 Mustang's.

*Special order only on the date coded Nodular cases ($300 premium but comes with correct Daytona pinion support and yoke), please call Don at (503) 463-1130.

*Trivia - The external "N" did not appear on nodular iron cases until after October 30, 1968.

Available Nodular case dates: 2B28, 2L9, 8G12, 8L13, 8M11, 9A29, 9C21, 9D24, 9D30, 0E29, 0J21, 0K21. Bear in mind that the Nodular cases were cast as needed in the foundry. Our source claims that there were only 2 casting dates in all of 1967. In some cases he has multiple cases with the same date. He has a good steady and changing supply on N-cases. Case casting numbers would be C2AW, C4AW-AB, and D0OW-B. The C2AW carrier would likely be for 1962-63 427 cars?

International orders - Due to the weight of these units there is a flat $350 shipping charge.


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Products (Click sub-categories above to ONLY display results for that Sub-Category) 1-13 of 13
Price: $1,499.85

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Availability: Ships Direct from Supplier
Item #: 20509 -

Limited slip 8 inch Ford third member rebuilt with all new parts. Factory new 4 pinion Trac-Loc unit, new Motive ring and pinion gears, new Timkin bearings, new crush sleeve, new bolts, and new seal. Rebuilt using 1967 and newer two rib style case, with oil fill plug, and standard 1310 yoke. There are various ring and pinion (gear) ratios and axle splines available, if you are unsure of what you need it is best to call (503) 463-1130 for your order. This is a drop ship item. *Note - New...

Price: $1,999.89

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Item #: 20510 -

Limited slip 8 inch Ford third member rebuilt with all new parts. Factory new Eaton True-Trac 8 pinion clutchless traction locking unit, Richmond ring and pinion gear, Timkin bearings, crush sleeve, bolts, and seal. Rebuilt using 1967 and newer two rib style case, with oil fill plug, and standard 1310 yoke. Ships with direction sheet and bottle of Ford Motorcraft friction modifier additive for the rear end gear oil. For use with 28 splined axles, but can be custom...

Price: $2,381.85

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Item #: 19797 -

Limited slip, nodular 9 inch Ford third member rebuilt with all new or reconditioned parts. Used modern design Detroit Locker unit, new Richmond ring and pinion gear, new Timkin bearings, new selective size sleeve, new bolts, and new seal. Rebuilt using 1967-1973 nodular 9 inch cases with oil fill plug, for 28 or 31 splined axles. This unit was used in 1967-73 Cougars and Mustangs, but it also came in any other Fords or Mercurys with a 9 inch drop out center section....

Price: $3,020.04

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Item #: 19801 -

Limited slip 9 inch Ford third member rebuilt with all new parts. New 4 pinion Trac-Loc unit, Richmond ring and pinion gears, Timkin bearings, crush sleeve, bolts, and new a seal. Rebuilt using the standard 9 inch case, with oil fill plug. Ships with direction sheet and bottle of Ford Motorcraft friction modifier additive for the rear end gear oil. For 28 or 31 splined axles. This unit is for 1967-73 Cougars and Mustangs, but it works for any other Mercurys or Fords with a 9 inch...

Price: $2,454.89

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Item #: 19802 -

Limited slip 9 inch Ford third member rebuilt with all new or reconditioned parts. Rebuilt 4 pinion Trac-Loc unit, with new clutches, steels, Richmond ring and pinion gears, Timkin bearings, crush sleeve, bolts, and seal. Rebuilt using standard 9 inch cases with oil fill plug. Ships with direction sheet and bottle of Ford Motorcraft friction modifier additive for the rear end gear oil. For 28 or 31 splined axles. This unit was used in Cougars and Mustangs, but also any other Fords...

Price: $1,908.86

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Item #: 19798 -

Limited slip nodular 9 inch Ford third member rebuilt with all new parts. New 4 pinion Trac-Loc unit, Richmond ring and pinion gears, Timkin bearings, selective size sleeve, bolts, and seal. Rebuilt using a nodular 9 inch case with oil fill plug. Ships with direction sheet and bottle of Ford Motorcraft friction modifier additive for the rear end gear oil. For 28 or 31 splined axles. This unit is for 1967-73 Cougars and Mustangs, but it can also be used for any other Ford or...

Price: $2,726.87

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Availability: Ships Direct from Supplier
Item #: 19803 -

Limited slip 9 inch Ford third member rebuilt with all new parts. New Eaton True-Trac 8 pinion clutchless traction locking unit, Richmond ring and pinion gear, Timkin bearings, crush sleeve, bolts, and seal. Rebuilt using 1967-1973 standard 9 inch case with oil fill plug. For 28 or 31 splined axles. This unit is for 1967-73 Cougars and Mustangs, but can be used on any other Ford or Mercury with a 9 inch drop out center section. Because of all the various ring and pinion...

Price: $11.15

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Availability: In-Stock Item
Item #: 12455 -

New pair of white and yellow paint sticks for the Mercury or Ford. These units were used by FORD at the assembly plants to mark fender aprons, radiator support, transmission, rear end housing, sheet metal, glass and variety of other parts. It's often little details like this that separate first and second place at the show.

Price: $11.05

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Availability: In-Stock Item
Item #: 14-0031 -

New RTV  oil resistant, high temperature, Ultra Black gasket maker for use on the Mercury or Ford. It's no mistake that Ultra Black has become an automotive industry standard. It's low odor, flexible, non-corrosive, vibration resistant, oil resistant, heat resistant, fast curing formula cannot be beat. Great for use on any surface that experiences high heat and oil like the valve cover gaskets.

Price: $1,184.27

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Availability: Out of Stock, Discontinued
Item #: 19799 -

Limited slip nodular 9 inch Ford third member rebuilt with all new or reconditioned parts. Rebuilt 4 pinion Trac-Loc unit, with new clutches, steels, Richmond ring and pinion gears, Timkin bearings, selective size sleeve, bolts, and seal. Rebuilt using a nodular 9 inch cases from 1967-1973 with oil fill plug. Ships with direction sheet and bottle of Ford Motorcraft friction modifier additive for the rear end gear oil. For 28 or 31 splined axles. This unit came in Cougars and...

Price: $399.87

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Availability: Out of Stock
Item #: 30530 -

Used Nodular Iron 9 inch third member case, known as "N" - Case. typically found on cars with 427-4V, 428CJ, 429CJ, Boss 302, Boss 351, or Boss 429. These are the factory installed heavy duty third members typically with 31 splined axles. These are bare cases as shown. Current dates available: 8L27, November 27, 1968; 0E29, May 29, 1970. Please have your desired date in mind when calling or place it in the comments section of your on-line order. We have removed the peg leg gears and parts...