73-87 GM Truck 81-91 SUV SM465 Chevy Transmission Cover Tower Cast Iron 3901131
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Good used GM SM465 cast iron cover with shifting forks and rails.
Part number 3901131.
This case top has the provision for a reverse light switch.
This is the cast iron case top not the aluminum cover used in the 88 plus pick up trucks.
Note: this is a later cover that has two threaded holes one for neutral sensor and one for reverse light switch.
Same as the earlier version but with provision for the neutral safety sensor.
