Red Line MT85 75W85 GL-4 Fully Synthetic Manual Gear Oil - 1 Litre

No, it is specifically designed for API GL-4 specifications and is recommended for manual transmissions and FWD transaxles. Always check your vehicle's manual to confirm the required API rating and viscosity.

It is generally not recommended to mix different gear oils, as it can compromise the performance and protective properties of the Red Line MT85. Drain the old fluid completely before refilling.

Notchy shifting refers to a feeling of resistance or hesitation when moving the gear shifter between gears, often described as feeling like shifting through sand or detents.

Refer to your vehicle manufacturer's maintenance schedule. For performance vehicles or severe driving conditions, consider changing the fluid more frequently, such as every 30,000 miles or annually.

While Red Line MT85 is designed to improve shift quality and synchro life, its primary function is not noise reduction. However, a properly functioning transmission with smooth engagement may subjectively seem quieter.

The viscosity is 75W85, which indicates its performance characteristics in cold (W) and hot operating temperatures.

Ensure the correct fluid level is maintained. If the issue persists, it may indicate internal gearbox wear or damage not addressable by fluid alone.

Check that the plugs are tightened to the manufacturer's torque specifications and that the sealing washers (if applicable) are in good condition and properly seated.

Verify that the Red Line MT85 is the correct specification (GL-4) for your transmission. If it is, persistent grinding may indicate significant wear to the gear teeth or synchronizers.