Dana Spicer 5-3255X Universal Joint - Rear Driveshaft at Rear Axle

Brand Dana Spicer 5-3255X
Position Rear Driveshaft at Rear Axle
Bearing Cap Diameter (1) 1.125
Bearing Cap Diameter (2) 1.125
Bearing Cap Diameter A (mm) 28.6
Bearing Cap Diameter B (mm) 28.6
Bearing Cap Type A OSR/ISR
Bearing Cap Type B OSR/ISR
Greaseable Y
Length A (In) 2.556
Length A (mm) 64.9224
Length B (In) 3.625
Length B (mm) 92.075
Material Steel
OEM Mfg Cleveland
OEM Series P55-55-675
SR(1)Brng Cap to Brng Cap(OSR) 2.556
SR(2)Brng Cap to Brng Cap(OSR) 3.625
Snap Ring Included Y
Snap Ring Type External, Internal
Type OSR/ISR Style
Product line FSGR
Fits Ford and Mercury · 2 vehicles

Genuine Spicer design. Built with Dana engineering, testing, and manufacturing processes.

Steel construction. Durable universal joint with greaseable serviceability.

Snap rings included. External and internal rings are provided for installation.

Cross-references Karlyn 375, 2-3049 and DS53255X for the same application. See all 5.

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Dana Spicer 5-3255X Universal Joint

The Dana Spicer 5-3255X is a greaseable universal joint built for the rear driveshaft at the rear axle on select 1979 Ford Thunderbird and 1979 Mercury Cougar applications. It uses steel construction, OSR/ISR style bearing caps, and included snap rings for a direct driveline service replacement.

Key Features

  • Part number: 5-3255X
  • Greaseable design for routine driveline maintenance
  • Steel construction for driveline service applications
  • OSR/ISR style with 1.125 in. bearing cap diameter on both sides
  • Includes external and internal snap rings
  • OEM series reference: Cleveland P55-55-675
  • Cross-reference part numbers: 2-3049, UJ375

Product Details

Built under the Dana Spicer FSGR line, this universal joint reflects Dana engineering, testing, and manufacturing processes used to deliver consistent driveline performance. The 5-3255X is specified with 28.6 mm bearing cap diameters, 2.556 in. cap-to-cap length on one axis, and 3.625 in. cap-to-cap length on the other, making it a precise service part for the rear driveshaft at the rear axle. It is a direct replacement choice for 1979 Ford Thunderbird and 1979 Mercury Cougar driveline service where the original joint matches the listed dimensions and snap ring style.

Common Problems This Part Helps Address

  • Driveline vibration from worn universal joint bearings
  • Clunking or looseness in the rear driveshaft
  • Need for a greaseable service joint during maintenance
  • Wear-related driveline noise at the rear axle connection
  • Replacement of a damaged or corroded U-joint in the driveshaft

Installation Notes and Tips

Verify bearing cap diameter, cap-to-cap length, and snap ring style before installation. This part uses external and internal snap rings and is greaseable, so align the joint correctly and service it with the proper lubricant after installation. Confirm the application matches the rear driveshaft at the rear axle on the vehicle before pressing the caps into place. Fits 1979 Ford Thunderbird, rear driveshaft at rear axle. Fits 1979 Mercury Cougar, rear driveshaft at rear axle.

Quality Assurance

Dana Spicer states that genuine Spicer parts are engineered, tested, and manufactured through an integrated process to maintain consistent performance in driveline service. The 5-3255X is built to those standards for OE-style replacement use.

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1979FordThunderbirdRear Driveshaft at Rear AxleGreaseable; with Inside Snap Rings; FSGR
1979MercuryCougarRear Driveshaft at Rear AxleGreaseable; with Outside Snap Rings; FSGR
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Karlyn — 3752-3049DS53255XE51312XUJ375