Red Line58404 Lightweight Shockproof Gear Oil - 1 Quart Bottle

Fantastic Gear Lube. Quiets down a noisy gearbox, and improves life greatly. Son has a 85 RX-7 with a 4:44 gear, and ported motor and his gearbox was beginning to make some noise, as well as synchros were starting to get noisy. Did a gear oil change to this, like I use in my race cars, and after a day of driving, all noise from the transmission was gone, and his synchros engage smoothly now, even when shifting faster. This isn't snake oil. This is by far the best lubricant you could get for a gearbox. Adjusting the level of shockloading with horsepower, and or load would be appropriate for each users application. Not sure which to buy, check the website, and simply buy a shockproof oil with actual viscosity that matches the gearbox requirements. The shockproof level will be worlds higher.

The subject is my 184,000 mile car with a Getrag 260 transmission which seemed to start showing its age lately. When taking off in first and then into second gear, you could hear a clakety-clack sound when the car was not fully warmed up. The sound was more noticeable after the clutch was replaced and I thought that soon I would either need to get a new transmission or replace the car. At a stop sign, in neutral, while waiting for the light to change, you could hear strange noises coming from the gear box. They would go away when you depressed the clutch pedal. I decided to give this gear oil a chance.The results were immediate: all the gear noises are gone, shifts are glass smooth. Performance with a cold or warm transmission are excellent. No teeth grinding when shifting. It just feels like a brand new car. :)Hats off to the engineers at RedLine lubricants.

I have a 2019 Edge ST with 32k miles. Ever since I bought it, it's had a shudder on tight turns that seemed to be coming from the rear diff. I got some of this and drained and filled with it and my shudder noise is gone. The blue color is nice too. Quality product that I would highly recommend.

I have a quart of this in my miata 5 speed along with 1 quart of Redline MTL to keep the trans alive with a turbo, so far so good.

works really good in my transmission helped with synchros grinding

Great service

Only oil used on my two RZR's XP 1000 front differential and transmission

Not sure what is going on with the suggestions for this oil, seriously Amazon, sheerness, warmth and thickness? Whatever, regardless, this oil has been running in my trans for about 2 years now and I have never had an issue. Shifts are smooth and crisp and solid. Never had a slip or hesitation. As much as that can be attributed to the gear oil this stuff is doing it’s job Across the country or across town, this stuff has performed without issue.