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Are you not getting heat, or is the blower not spinning?

many of us would use Valvoline MaxLife trans fluid in that car. I did. It's Dex II/III/VI w'ever compatible.

The buttons work valves in a vacuum system that moves doors to rout the air to different vents. Temperature slider moves a blend door, via cable, that directs 0-100% of the air through the heater core, which is always heated by engine coolant. The vacuum system is fed from a small tank, white plastic, or older ones might be a black ball shape, over on passenger side under the hood. One small line goes in to the button assembly. You should hear hisses and things move if you change button settings immediately after shutting off the engine. I don't recall where the contact for the blower motor is, but also be aware that the lower speeds often stop working due to the resistors burning out. They are on a thing down by the motor, in the air path, with 4 wires connector.

update. im not sure witch axle it was i replaced both front axles today and the wobble is gone.

also needs to be fully warmed up and preferably each gear gone thru (ie: short drive) before checking while parked on a level surface and idling...

IIRC, 700 stick, 800 for auto.

Idle as low as possible without it struggling. Factory tach’s can be a little off. As long as you have good drivability and the engine is not racing or about to die, you’re good.

Finished repairing the trim behind the steering wheel. The plastic was breaking apart so I built it back up with epoxy where it was disintegrating, shaped it and painted it. The paint is a Rustoleum Classic Navy blue which is close enough the the blue interiors to be acceptable. The making of the new seats is underway also.