LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1968 >> C25/C2500 Pickup 5.3L Eng, Not Available Trans, _NA_ >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Transmission Controlled Spark System >> Maintenance & Testing >> Transmission Switch

Transmission Switch

Connect vacuum gauge in line to distributor vacuum advance unit. Put transmission in reverse on Hydra-Matic or high on manuals and Powerglide.

NOTE: Powerglide equipped vehicles must have rear wheels off floor and accelerated to permit shift into high gear.

Observe vacuum gauge for a manifold vacuum reading. Replace transmission switch if gauge has a "O" reading.

scientia non olet · About LEMON Manuals