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Drive Shafts

Courtesy of PST - Precision Shaft Technologies

Step 1:  Identify Transmission

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.

Step 2:  Identify Rear U-Joint

PST Diagram D 

If Pinion Yoke has Placement tabs that retain the U-Joint, measure inside tabs. See Diagram D.

 PST Diagram E 

If Pinion Yoke does not have Placement Tabs that retain U-Joint, measure from flat of yoke inside to inside. See Diagram E.

  PST Diagram L

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.

PST 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 accomodate most sportsman classes. Also available: Performance Dynamic Cryo Joint.

1350 Spicer Series: Manufactured with OEM tolerances and treated with our Cryogenic Process to yeild the strongest U-Joint available. 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. 

Step 3:  Driveshaft Measurements

NOTE:  Driveshaft measurements are from U-joint center line to U-joint center line.

Driveshaft Measurements:

PST Diagram N 

If PST is supplying you with transmission slip yoke, Pinion yoke and driveshaft yoke measure Dim W. See Diagram N.

If PST is supplying you with transmission slip yoke and driveshaft measure Dim X. See Diagram N.

2 Piece driveshafts use Dim Y + Z. See Diagram N.

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