ZF 4hp18fla rebuild.. Fuchs Titan ATF1 or Pentosin ATF1 (no longer approved by ZF)

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Jan 5, 2024
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Hi, Ive just finished completely rebuilding my ZF 4hp18FLA out of my 94 Audi 100 quattro wagon.

Based off the 11A/11B approvals on the ZF TE-ML 11 that I originally looked at, and all the research I did, I was going to go with Pentosin ATF1 in the trans. I just looked at the newest TE-ML 11 a few days ago, and Pentosin ATF1 has lost the 11B approval. Fuchs Titan ATF1 now has the 11B approval. I talked to Fuchs (they own Pentosin) and they said that Pentosin is now being sold only in the US, so it doesnt qualify for ZF's global approval anymore. He sent me both product data sheets.

I have both of these fluids available to me, Im pretty confident that they are both great, but they have different specs, was hoping someone could tell me if there is enough difference between them to make one an obvious better choice.. I only have basic understanding of transmission fluid specs.

FUCHS TITAN ATF1
Density at 15 °C 0,850 g/ml
Flash Point, CoC 180 °C
Pour Point -48 °C
Dynamic Viscosity at - 40°C 18.000 mPas
Kinematic Viscosity at 40°C 40 mm²/s
Kinematic Viscosity at 100°C 7 mm²/s
Viscosity Index 165
Colour None

PENTOSIN ATF1
Density at 20°C 850 kg/m³
Flash Point >220°C/>428°F
Pour Point -51°C/-59.8°F
Dynamic Viscosity at -40ºC 14000 mPa*s
Kinematic Viscosity at 40ºC 38.0 mm²/s
Kinematic Viscosity at 100ºC 7.6 mm²/s
Wet Boiling Point ≥170°C/≥338°F
Appearance Amber & Clear
pH Value Slightly Alkaline
 
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