Not sure where the rumor started, but it's pretty common for a lot of misinformation to be spread antime standards are changed. GL-5 gear oils have higher levels of yellow-metal anti-corrosion properties than GL-4. You still have to check the level.Īs the document shows, MT90 or 75W90NS is called for, by Redline, whenever a 90 weight oil is called for.Īs for GL-5 not providing adequate anti-corrosion for yellow metals, this is the reverse of what is true. Another thing to remember is that low oil levels will cause damage, and no oil will protect against that. You run too thin of an oil, it's your fault when things go south, not the oil.Īlso, you should never extend oil change intervals without getting oil analysis. Redline has some of the best oils available, BUT, you have to stick to the oil that is best for your application. I don't recomend them in street applications. Shockproof Gear oils are typically used in racing applications where logevity is not a prime consideration. You can also use the 75W90 NS in Torsens, as friction modifiers are to eliminate chatter in clutch type LSDs, and reduce Torsen bias by. MTL is to be used in transmissions that call for 30 weight motor oils, not transmissions that call for 90 weight gear oils, which should use MT90 or 75W90 NS, which has no friction modifiers, allowing syncros to spin up faster. Based on my experience, however, I think I'll save 2/3 the cost of syns and use regular dino oil instead. Your results may vary, but I intend to continue replacing trans/diff oil every 30K. He recommended whatever weight/grade lube the manufacturer recommended and said he had not seen extraordinary wear protection from syns in transmissions. The trans guy replaced mine with a used one which reduced, but did not eliminate, the noises while idling nor the whine in the first three gears. We had gone this far so I decided to pay the $600 quoted to replace this gear (and made a mental note to keep this car for a few more years) only to discover that this part is on national backorder, meaning that it is not available. The teeth were visibly narrower than those of the gears to which it engages. To make a long story short, I had the transmission torn down to discover the the main input gear (on the input shaft from the engine) was excessively worn. Noise disappeared when clutch was depressed. As long as the car was apart, I opted to replace the clutch and pilot bearing as well-all OEM stuff.Īll was well for a couple of weeks, but then I started hearing a whine in first three forward gears and mechanical noise (nothing grinding but more like gear noise) when standing still with clutch engaged. I normally use Mobil 1 or whatever is on sale and change every 5K.Īnyway, took car in for a throw-out bearing which started sounding like a sick cat when the clutch was depressed. I'll keep using syns in my engine because mechanic who did timing belt replacement was absolutely amazed that engine had NO deposits or sludge (guess he doesn't see many engines which use syn exclusively). I now have 98K of mostly in-city driving (not many country freeways here). Have had a 97 since 20K miles and have religiously used synthetic oils throughout. Kinda long but this raises questions about the benefits, if any, of using Redline in transmissions.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |