Red Line Oil (50304) MT-90 75W-90 GL-4 Manual Transmission and Trans axle Lubricant - 1 Quart

Used it in my safari dicor. Awesome performance. but the price is on higher side.

The best GL4 oil money can buy. Excellent seller as well. Rating 5 stars

Gear shift more smoother, right after changing the transmission fluid.

My safari storme was due for gear oil change so I changed it at the regular service center. The very next morning when I started the car after oil change, the gear shifts got very hard in 1st and 2nd gear, which lead me to believe that they had used regular conventional(mineral) gear oil, however things were fine once the car warmed up to running temperatures. So I started searching for fully-synthetic 75W-90 gear oil offline and online and stumbled upon Liqui Moly 75W-90 GL4+ rated gear oil. I ordered it and used it. The gear shifts became really soft at cold starts, just like it used to with the original gear oil that came with the car from factory. But the gear shifts became a little bit notchy at cold as well as running temperatues. So I did some research and found that even though GL4+ rated oils are said to be compatible with GL4 and GL5, it contains atleast 50% of the EP(Extreme Pressure) additives of GL5 which is bad for the synchronizers inside the manual transmissions. This EP additives makes GL4+ and GL5 rated oils very slippery and the oil doesn't stick properly to the synchronizers, which overtime corrodes the synchros and shortens the lifespan of gearbox. So this time I searched strictly for GL4 rated oil and this Redline MT90 is the only one that I have found. I used it and it solved my problems. The gearbox now operates just like it used to with the factory oil. So, if you have a manual transmission car of any brand, please avoid GL4+ and GL5 rated gear oils. These oils will damage your transmission in the long run, as these are generally meant for automatic transmissions and rear axles where hypoid gears are present. TATA generally recommends Castrol Syntro synthetic gear oil but this is almost impossible to find at shops and distributors(may be available at metro cities), and not all TATA service centers use this oil at their workshop, atleast not in the area where I service my car so I had to improvise.

Viskas gerai.

ロードスターND、純正ミッションオイル・ニュー〇〇〇・カスト〇〇〇と交換してきました。 数キロ走行時の1速・2速のアップダウンの入り難さに惑わされていました。 外気温度が影響するのか？GL規格が影響するのか？ 私的にミッションオイルのGL規格を知らずGL5を使用してきましたが、しかし、NDの取扱書を見るとGL-4の指定！75W90に捕らわれ、GL規格を無視してきました。 極圧剤の添加量がGL-5の方が多い事をネットで知りました。GL4指定の車種にはGL4ですね。 カスト〇〇〇はGL-4規格、1速・2速のシフトチェンジの違和感はかなり改善されました。 ネット上で、レッドラインのミッションオイルの評価が良い事を知り、レッドラインMT-90を購入しました。 レッドラインMT-90に交換後、100ｋｍ程の走行距離後、外気温15℃位で数キロ走行してみて感じた事は カスト〇〇〇と比べると1速・2速のシフトチェンジの違和感は同じでしたが、シフト操作で”コツ、コツ”と メカニカル感に変わりましね。 ”ヌルッ”感はカスト〇〇〇、”コツ”感は、MT-90ですね。個人的な好みでは”ヌルッ”感の方が好きかな。 現在11月初旬で外気温10℃前後ですが、出だしのシフトフィーリングは多少違和感を感じつつも良い感じです。

I bought this for the gearbox in one of my classic cars, which has slightly worn synchromesh, and the improvement was noticeable almost immediately. Gear changes feel smoother and less notchy, particularly when shifting between gears that previously needed a bit more care. It's not a miracle cure for worn components, but it has definitely helped the gearbox feel more refined and enjoyable to use. The oil is easy to work with and has a great reputation among classic car owners for good reason. While it won't fix a worn gearbox, it can certainly help get the best out of one that's showing its age. I'll be using it again at the next oil change. Highly recommended for older manual gearboxes that specify a GL-4 lubricant.

My 2008 Tiburon V6 6spd was whining at me and didn’t like going into gear. I bought her 3 bottles of this and she shut right up. Shifts smooth as butter and quieter than ever.

Este aceite es completamente sintético, viene con todo y sus sello en la boquilla, lo utilice en una transmisión Toyota serie C60, hasta ahora todo funciona excelente.