1978 Gmc Sierra Transmission Type C6500 4 Speed Auto W Pto Park Lock Only

1978 GMC SIERRA
64,000 MILES
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what is my transmission type? 1978 GMC Sierra C6500 4 speed auto w PTO and no park lock only driveshaft brake, 350 motor.
Mar 5, 2013 at 8:37 PM
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