Transmission Fluids
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
Trans-C
™
HT
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D 4998 FZG Gear Wear
60
50
40
30
20
10
0
W
eight
Loss
(mg)
Trans-C HT TO-4 A TO-4 B
Fluid Identity
Excellent Pump Protection
e outstanding anti-wear hydraulic performance of Castrol Trans-C HT is illustrated in a Vickers D 2882
Modified Pump test. Castrol Trans-C HT showed only 9 milligrams weight loss on the parts, which is well
below the passing limit. e pump part photos show them to be in excellent condition with very little evidence
of wear on the rings and vanes.
Vickers D 2882 Vickers D 2882 Ring
OEM Specifications
• Meets or exceeds Caterpillar TO-4 requirements
• Vickers 35VQ25 Vane Pump Performance
D19
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