Fluid · Manual Transmission
Manual Transmission
for 1980 Ford F-100 300ci I6 · RWD
Fluid Type
80W-90 GL-4
Spec: API GL-4
Capacity
3.5qt
3.31 L
Drain & Refill
3.5 qt
3.31 L
Change Interval
50,000 mi
80,450 km
Data quality
Book-style estimate
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Notes
NP435 or T18 4-speed manual typical. Do not use GL-5 in synchronized transmissions.