Fluid · Manual Transmission
Manual Transmission
for 1981 Ford F-350 300ci I6 · RWD
Fluid Type
80W-90 GL-4 or Type F ATF
Spec: API GL-4 or Ford Type F
Capacity
7qt
6.62 L
Drain & Refill
7 qt
6.62 L
Change Interval
50,000 mi
80,450 km
Data quality
Book-style estimate
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Notes
NP435 4-speed or ZF S5-42 5-speed. Type F ATF improves shift quality in cold weather