Slick 50 60199080 Manual Gearbox Treatment, 80 ml

If you read on the web, reviews are very varied. Most of the negative comments are from people who have never used it. I have found it fantastic for slightly older gearboxes where the gears are a bit sticky. Used it in my cars and bikes on and off for over 30 years. You probably dont really need it in a new car & likewise it won't fix something broken, but for slightly worn gearboxes that need a bit of help, Slick 50 is the solution. I used this one on the transfer box of my Landcruiser; the diff lock was sticking and now works instantly. Result.

I have used various oil additives in all my cars over the last 37 years, and I think Slick50 is effective, safe and although it seems quite expensive I only use it every 30,000 miles when I change my gearbox oil, so it's not so bad. Be carefull when choosing your gearbox oil with reguard to GL4 / GL5. The GL5 grade uses different chemicals in it and may lead to bronze bearing deterioration & failier if incorrectly used. The GL4 specification seems to safer if yore not sure. Always check with the hand book / internet / ask for advice if you can before replacing the oil.

Makes the car run better

I have been using this in VW boxes for decades, it transforms a gearbox, especially when used with Red Line MTL or MT90 depending on application.

Synchromesh problem shove this stuff in. Takes a week or so to work fully

I have use this product before, and had on problems , so I am hoping for the same result.

Always liked Slick-50 engine treatment. This however is Mad packaging for a small container - pre-packed measurers = more plastic waste to "dispose" of.

at time of writing have just added it to gearbox after oil change. fast delivery and hoping for great things from this stuff

Ottimo qualità, si nota la differenza, non rimette in sesto cambi usurati ma serve come aiuto per prolungare la vita di un cambio avente regolare manutenzione.

Super vielen Dank

Door gebruik loopt de manuele versnellingsbak nog soepeler. Mooi resultaat.

muchisima mejora, ni gota de ruido y muchisima suavidad

Alors maintenant je suis bouche B. Je mets depuis 40 ans le slick50 pour le Moteur. Toutes mes moteurs ont mieux tourné. Maintenant j’avais un petit bruit dans ma boîte a vitesse de ma Jeep. Je me suis dit si slick50 pour moteur est si bien, pourquoi pas essayer le slick50 pour boîte a vitesse. Eh ben maintenant je vais le mettre dans toutes mes boîtes a vitesse. Ca ma améliorer ma boîte a 100%