Dana Spicer 5-1200X Universal Joint

Dana Spicer 5-1200X Universal Joint Overview

The Dana Spicer 5-1200X universal joint is a greaseable ISR-style driveline component built for specific rear driveshaft applications. It uses 1.063-inch bearing caps, a 2.375-inch inside snap ring dimension, and a steel construction to match the service requirements of classic Ford and Mercury driveline setups.

Demand for genuine Spicer parts comes from the way Dana designs, tests, and manufactures these components as a system. For owners servicing a Ford Mustang rear driveshaft at transmission or a Mercury Cougar rear axle application, the 5-1200X provides the correct dimensions and serviceable design for direct replacement work.

Key Features

• Part number: 5-1200X
• Brand: Dana Spicer FSGR
• Universal joint for driveline and axle service
• ISR style with internal snap ring retention
• 1.063-inch bearing cap diameter on both ends
• 2.375-inch inside snap ring dimension
• Greaseable design with one straight lube fitting in the cross
• Steel construction for driveline durability
• Snap rings included

Detailed Product Description

The Dana Spicer 5-1200X is a replacement universal joint engineered for rear driveshaft service where the OEM specification calls for a 27 mm bearing cap diameter and ISR-style fitment. It is listed for Cleveland OEM series S55 applications and is used across multiple Ford, Lincoln, and Mercury driveline positions, including rear driveshaft at transmission, rear driveshaft at rear axle, and rear driveshaft CV at rear axle configurations.

This part cross-references SKF UJ250 and UJ429 for the same application. It is also associated with Mercury Colony Park, Mercury Cougar, Mercury Capri, Mercury Bobcat, Ford Mustang, Lincoln Continental, Mercury Marauder, and Ford Thunderbird fitments in the years shown below.

Vehicle Fitment

• Fits 1987-1991 Mercury Colony Park, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1961-1963 Mercury Colony Park, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1980-1988 Mercury Cougar, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1981-1988 Mercury Cougar, rear driveshaft at rear axle; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1980-1982 Mercury Cougar, rear driveshaft - CV at rear axle; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1979-1986 Mercury Capri, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1979-1986 Mercury Capri, rear driveshaft at rear axle; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1980 Lincoln Continental, rear driveshaft at rear axle; 1.062in bearing cap diameter; greaseable; inside snap ring dimension of 2.375in; without towing package; FSGR.
• Fits 1975-1980 Mercury Bobcat, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1980 Mercury Bobcat, rear driveshaft at rear axle; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1968-1969 Ford Mustang, rear driveshaft at transmission; 1.062in bearing cap diameter, greaseable, inside snap ring dimension of 2.375in; FSGR.
• Fits 1963 Mercury Marauder, rear driveshaft at transmission; 1.062in bearing cap diameter; from 06/03/1963; greaseable; inside snap ring dimension of 2.375in; FSGR.
• Fits 1963 Mercury Marauder, rear driveshaft at rear axle; 1.062in bearing cap diameter; from 06/03/1963; greaseable; inside snap ring dimension of 2.375in; FSGR.
• Fits 1962 Ford Thunderbird, rear driveshaft at transmission; 1.062in bearing cap diameter; greaseable; inside snap ring dimension of 2.375in; with inside snap rings; FSGR.

Common Problems This Part Addresses

• Driveline vibration from worn universal joint bearings
• Clunking or looseness during acceleration and deceleration
• Grease loss or dry joint wear in serviceable driveline setups
• Need for a correct ISR-style replacement during rear driveshaft repair
• Fitment issues caused by incorrect bearing cap diameter or snap ring dimension

Installation Notes and Tips

Verify the bearing cap diameter, inside snap ring dimension, and joint style before installation. This 5-1200X universal joint is greaseable and uses an internal snap ring design, so the driveshaft yoke and retention grooves must match the listed dimensions. Confirm the exact position on the vehicle, especially on applications that use different joints at the transmission, rear axle, or CV rear axle location.

For best results, clean the yoke bores thoroughly, inspect for wear or distortion, and grease the joint after installation using the straight lube fitting in the cross. On vehicles such as the Ford Mustang and Mercury Cougar, matching the OE-style dimensions is critical for proper driveline alignment and smooth operation.

Quality Assurance

Dana Spicer builds this joint using Dana engineering, testing, and manufacturing processes to maintain OE-level dimensional accuracy and service consistency. The 5-1200X is a genuine Spicer replacement designed around the listed OEM specifications and fitment data for dependable driveline service.