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Old 03-16-2002, 08:58 PM
69 Firebird 69 Firebird is offline
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For your 87 firebird, the trans is a 700R4. The hard shift can be by modification (i.e. BM shift kit) or anomaly. If by anomaly, 2 potential suspects: detent misadjusted or governor valve sticking. Both will cause a late, hard shift. To adjust detent cable, locate detent cable at bracket on intake manifold. There is a "wedge" in the section of the cable immediately behind the bracket. Pull out on the wedge with a screwdriver. Move throttle to wide open and push wedge back in. If it iss the governor, remove housing cover at left rear of trans. Remove governor. Valve runs through center of governor. Check for freedom of valve movement. if stuck, remove roll pin at nylon gear and remove gear. Extract valve by puching on it from between flyweights. Clean assembly with brake or carb cleaner. If it sticks again after reassembly and driving, trans is probably trashing out and will need rebuilt.
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