Identify Transmission
Identify Rear U-Joint
Driveshaft Measurements

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Chrysler - Dodge	727 - 30 Spline 1 11/16" Seal Diameter 904 - 26 Spline 1 9/16" Seal Diameter
Ford	C6-T56 - 31 Spline 1 11/16" Seal Diameter AOD & C4 & T5 - 28 Spline 1 1/2" Seal Diameter 4 R 7OW - 28 Spline 1.598" Seal Diameter
General Motors	T-350 700R4-4LLOE - 27 Spline 1 1/2" Seal Diameter T-400-4L80E - 32 Spline 1 7/8" Seal Diameter

Note: Transmission slip yokes are manufactured with various U-Joint Series. It is important to match Horsepower and Torque requirements to U-Joint Series. For aftermarket transmission applications usually a spline count and seal diameter will identify slip yoke required.

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If Pinion Yoke has Placement tabs that retain the U-Joint, measure inside tabs. See Diagram D
If Pinion Yoke does not have Placement Tabs that retain U-Joint, measure from flat of yoke inside to inside. See Diagram E.
If 4 bolt Flange is used on pinion, measure Pilot Diameter and center to center diagonally bolt hole to bolt hole. See Diagram L.
Universal Joint Size There are hundreds of U-Joint sizes or "Series" to accomodate many different applications of power and desired longevity for your automotive, 4x4 truck or auto racing requirements, these 4 series of joints cover most needs. See Diagram A.

1310 Spicer Series: 1 1/16" Cup Diameter (Dim C - Diagram A) 3 7/32" length (Dim B - Diagram A) Certain Ford applications have 2 cups 1 1/8 Diameter. Appropriate horse power range is up to 500 in circle track or road racing, small tire drag racing and 4x4. Also available: Performance Dynamic Cryo Joint.

1330 Spicer Series: 1 1/16" Cup Diameter (Dim C - Diagram A) 3 5/8" length (Dim B - Diagram A) Certain Ford applications have 2 cups 1 1/8 Diameter. Slightly stronger than 1310, Used in 5.0 Mustangs. Also available: Performance Dynamic Cryo Joint.

3R Saginaw Series: 1 1/8" Cup Diameter (Dim C - Diagram A) Retained with internal clip 2 5/8" (Dim B - Diagram A). Most common GM joint. Horse power range up to 700 in road racing and circle track. Solid drag racing U-Joint can accommodate most sportsman classes. Also available: Performance Dynamic Cryo Joint.

1350 Spicer Series: For drag racing applications a solid non-lube design U-Joint is recommended because of the tremendous initial shock load, or short duration of high torque the joint must be able to withstand.

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If PST is supplying you with transmission slip yoke, Pinion yoke and driveshaft yoke measure Dim W. (Dim W - Diagram N) If PST is supplying you with transmission slip yoke and driveshaft measure Dim X. (Dim X - Diagram N) 2 Piece driveshafts use Dim Y + Z. (Dim Y - Diagram N)