Checking & Adjusting: Checking: Notes

Transmission Angle (All Models) 

1. Select and install correct wood block and use suitable hold-down clamp (BT-6511-17). Install upper hook through hole in frame and lower hook around shock unit on all models except Omega.
   Fig 1: Spring Hold Down Clamp

   Courtesy of GENERAL MOTORS COMPANY
2. On Omega models only, install upper hook over rubber bumper and lower hook under spring. On all models, adjust turnbuckles on clamps until wood blocks fit snugly between axle housing and frame.
3. Clean all dirt from exposed surfaces of universal joint bearings. On Omega only, remove retaining rings from bearings on Spicer equipped universal joints.
4. On Cutlass models, turn propeller shaft until slip yoke bearings are vertical. Install adapter (BT-7314) to bearing surface and center magnetic end of inclinometer (BT-6902) on bearing surface.
5. It may be necessary to rotate propeller shaft slightly to allow weight and cord to hang centered in slot at gauge end of tool. Turn knob of tool until weighted cord is at "O" marking of gauge.
   Fig 2: Checking Transmission Angle (Typical)

   Courtesy of GENERAL MOTORS COMPANY
6. Remove tool from bearing surface and rotate shaft 180°, then center tool on this bearing surface. Weighted cord should be at "O" marking without turning adjusting knob of tool. Remove tool.
   CAUTION: Do not turn adjusting knob.
7. Rotate propeller shaft 90° until shaft yoke bearings are vertical. Center magnetic end of tool on bearing surface. Read gauge at cord position and record reading. See Propeller Shaft Specifications for correct transmission angles.