Synthetic 50 WT Transmission Oil

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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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Matthew Dill uses Lucas Transmission Fix for 1994 Ford Ranger

Dear Lucas Oil,

I am writing you today because I want to personally thank Lucas Oil for making such great products. I purchased a 1994 Ford Ranger Super Cab with a 4L V6 engine and the A4LD automatic transmission.

I took it to a well known transmission shop to get the transmission fluid and filter changed because it was shifting hard. They refused to change the fluid and filter for me because they said since the truck had 130,000 miles on it that it needed a $1300 rebuild job. They said that changing the fluid and filter would only make it worse. The manager told me I would be lucky if I got another month of service out of the transmission.

Of course I wanted a second opinion, so I went to a local mechanic near my home and he recommended changing the fluid, filter and adding Lucas Transmission Fix. I let him do it since I didn't have much to lose.

The price that I paid for this service sure beats $1300 any day. Needless to say, I have not had a bit of problems for four months now driving 70 miles round trip to work and the transmission shifts like it should.

Again, thank you for making such a product and saving me $1300 for a transmission rebuild. I can't wait to try the oil stabilizer and the fuel treatment that I purchased today.

Matthew Dill

Minford, Ohio

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