Preparing the Crankshaft and Convertor for Installation
• Always check the crankshaft pilot for burrs and out-of-round.
• Remove any rust with emery paper and lightly grease pocket receiving torque convertor pilot hub.
• Remove paint from the torque convertor’s crank pilot hub with emery paper.
• Before installation, pre-fit the torque convertor to the flex plate and into the back of the crankshaft. It should be a snug, even fit (not loose or binding).
• Slowly pour two quarts of automatic transmission fluid into the convertor.
• Check the flex plate for cracks or worn teeth.
• Replace the transmission front seal.
• Install the torque convertor on the front of the transmission.
• When installing the torque convertor into the transmission, you will feel it seat 3 times for the input shaft, shaft to stator, and oil pump notches.

Checking Convertor-to-Flex Plate Alignment
• Install two transmission-to-bell housing bolts (hand tight) and check the convertor for free movement.
• After the bell housing bolts are tightened, check the movement of the convertor. It should have 1/16”-1/8” of clearance between the pads on the convertor and the flex plate. If you have more clearance than specified, install equal thickness washers to reduce the clearance down to the specifications. If there is not enough clearance, remove the transmission and check to see if the convertor is seated in front of the pump properly.
• Add Loctite о to the torque convertor nuts and/or bolts before installation.
• Draw the convertor bolts up evenly so as not to bind the convertor, which would cause vibration and pump bushing failure.
• If there are vibrations after installation, mark the convertor to flex plate and rotate one bolt at a time. NOTE: The #1 cause of vibration is the failure to prepare the crankshaft for installation. Each time the convertor is installed without sanding off the crankshaft rust, removing the paint from the convertor pilot and adding a little grease, the convertor may be drawn up crooked with the first bolt. This condition may cause the convertor to run-out and will usually ruin the pump bushing. The second most common complaint on convertors is a whine after installation. This usually means that there is too much clearance between the convertor pads and the flex plate. This draws the convertor hub too far out of the pump drive gear, causing the gear to “rock”.

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Related Tags: automatic transmission, automatic transmission fluid, bell housing, bolts, burrs, conver, crank, crankshaft, emery paper, flex plate, input shaft, notches, oil pump, stator, time note, torque, torque convertor, two quarts, vibrations, worn teeth