Synthetic 50 WT Trans Oil

Synthetic 50 WT Transmission Oil


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Lucas Synthetic 50 WT Transmission Oil is designed especially for heavy duty truck transmissions but can be used in many other applications.

Common gear oils are mostly base stocks with little more than an addition of sulfur and phosphorus as a total anti-wear package. We at Lucas Oil Products consider this inadequate. Most heavy duty truck transmission manufacturers now consider sulfur and phosphorus to be potentially corrosive to copper and brass and consequently recommend against common gear oils for this reason. The other 50 WT we have tested, synthetic or otherwise, are pure base stock, we consider this also inadequate.

Lucas Synthetic 50 WT contains an exclusive additive concentrate derived from synthetic oil that ensures lower operating temperatures and better lubrication, especially to upper bearings and gears. This is a long lasting fluid that is far superior to conventional synthetic fluids and contains nothing that could be harmful.

Meets or exceeds API MT-1, Eaton Transmission Div., 164 rev 7, Mack Truck TO-A Plus, International Truck TMS 6816 and other applications requiring non-EP Lubricants.

Key Benefits

  • Long lasting fluid
  • Ensures lower operating temperatures and better lubrication
  • Contains an exclusive additive concentrate


  • #10146 - 1 Gallon (Case of 4) - 33 lbs
  • #10147 - 5 Gallon Pail (1 Pail) - 40 lbs
  • #10149 - 55 Gallon Drum (1 Drum) - 440 lbs
  • #10561 - Per Gallon Tote (1 Tote)


Product Spec Sheet Technical Data Sheet
Safety Data Sheet Safety Data Sheet

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Product Videos - Synthetic 50WT Transmission Oil

  • Lucas Synthetic 50 WT Transmission Oil

Henry Garcia uses Lucas Transmission Fix in his 1988 Toyota Corolla

My 1988 Toyota Corolla's transmission was overheating during longer drives, causing the fluid to overflow out the dip tube. A trusted repair shop diagnosed it and recommended the Lucas Transmission Fix product. I followed the directions and the product worked as advertised. It controlled the overheating and the problem stopped completely after a short time. Initially, I added it to the existing fluid without draining any out as recommended, and the issue actually worsened before it completely stopped because, I believe, the fluid level was too high. Upon changing the fluid at the next regular interval, however, I again added the product along with the new fluid and had no problems at all. I would highly recommend this product to anyone with a transmission overheating issue due to worn seals, etc. –Henry Garcia
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