Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1989SKYHAWK BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL & TESTING - 125C/3T40TRANSAXLE DISASSEMBLYREACTION UNITREACTION SUN GEAR-TO-INPUT DRUM END PLAY
1989 Buick Skyhawk Base, 2D Coupe, Automatic
Reaction Sun Gear-To-Input Drum End Play
1989 Buick Skyhawk Base, 2D Coupe, AutomaticSECTION Reaction Sun Gear-To-Input Drum End Play
- Install Output Shaft Aligner/Loader (J-26958) in fully loaded position. See Figure . Using 2 case cover bolts, install Reaction Sun Gear Snap Ring Gauge (J-28588) to case. See Figure . Position gauge extension between open ends of selective snap ring.
- Press reaction sun gear down to seat. Position gauge extension between open ends of snap ring. Install dial indicator onto Extension Post (J-25025-7). Position feeler gauge beneath shoulder of gauge extension, and zero dial indicator.
- Rotate selective snap ring under gauge extension. Remove gauge from under shoulder. Dial indicator should read .005-.013" (.13-.33 mm).
- Snap ring is located on reaction sun gear shaft. Measure thickness of snap ring for proper identification. See REACTION SUN GEAR-TO-INPUT DRUM SNAP RING .
REACTION SUN GEAR-TO-INPUT DRUM SNAP RING
| Thickness: In (mm) | Color Code |
|---|---|
| .089-.093 (2.26-2.36) | Pink |
| .096-.100 (2.44-2.54) | Brown |
| .103-.107 (2.62-2.72) | Light Blue |
| .109-.113 (2.77-2.87) | White |
| .116-.120 (2.95-3.05) | Yellow |
| .123-.127 (3.12-3.22) | Light Green |
| .129-.133 (3.28-3.38) | Orange |
| .136-.140 (3.45-3.56) | No Color |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.