Buick 1994359 Switch Assembly, Parking/Neutral Position

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The neutral safety switch, which incorporates the back-up light switch, can be removed and installed from 4T60 and 4T60-E Transaxles by first disconnecting the negative battery cable. In 1992-93 Eldorado and Seville, the air cleaner housing and duct should be removed. The shift linkage, electrical connector, and vacuum hose should then be removed, followed by the attaching nut and the shift lever. The fuel line bracket and bolt should be removed next, followed by the retaining bolts and the switch. To install, the process should be reversed, with the switch adjusted and the retaining bolts tightened to 20 ft. lbs. (27 Nm). For 4T80-E Transaxle, the process is similar, but the control cable at the lever on the transaxle manual shaft should be removed, followed by the control cable bracket and cable on the transaxle. The retaining nut and transaxle manual shaft lever should be removed, followed by the electrical connector and hose, and then the retaining bolts and the neutral safety switch. To install, the process should be reversed, with the switch adjusted and the retaining bolts tightened to 106 inch lbs. (12 Nm), and the manual shaft lever retaining nut tightened to 15 ft. lbs. (20 Nm). The neutral safety switch must be adjusted so that the engine will start in PARK or NEUTRAL only to avoid personal injury. The neutral safety switch retaining bolts should be loosened, the transaxle manual shaft rotated to the NEUTRAL position, and the switch rotated until a 2.34 mm gauge pin can be inserted in the adjustment hole. The switch retaining bolts should then be tightened to 20 ft. lbs. (27 Nm) on 4T60 and 4T60-E transaxles or 106 inch lbs. (12 Nm) on 4T80-E transaxles.

Ensure the transmission is still in neutral and use an alignment tool to properly position the switch.