Servicing your car’s transmission is an integral part of routine car maintenance, but even more crucial is making sure you use the right kind of oil and fluids.
If you have a TREMEC TKO transmission, there are only a few oils or fluids recommended for use, and TREMEC cautions against alternatives.
The most recommended oil for TKO & TKX is
AMSOIL Synthetic Manual Synchromesh Transmission Fluid
GM Synchromesh Oil
TREMEC Transmissions recommends only three types of oil or fluid for the TREMEC TKO transmission, one of which is GM Synchromesh, specifically part number 12345349 and the TR-35505sp model.
Dexron III Oil
Another recommended oil for TREMEC TKO transmissions is the Dexron III or Dexron III/Mercon Spec ATF fluid.
Dexron III ATF is also used for the T56 and 3650 models.
The final transmission oil, recommended specifically for the Viper T56 TREMEC TKO model, is Castrol Sytorque. Discuss the model and/or conversions you have for your TREMEC TKO transmission with a mechanic to determine the proper oil to use. When you service your transmission properly and regularly, the high-quality, overdrive performance of your TREMEC TKO will remain in good shape.
Fill Location and Level
Remember that you should always fill your TREMEC TKO transmission with oil through the fill plug on the passenger side of the transmission.
When the oil approaches the fill plug hole, sufficient oil has been added.
TREMEC Transmissions mentions 5.28 pints as an approximate amount of oil for these transmissions to contain.