Originally Posted by zeng
Originally Posted by pleopard
This morning, -11C, the first few shifts from 1st to 2nd were the roughest I've felt - they were essentially gear-clashing shifts... [censored]... I'm not overly optimistic there going to solve anything tomorrow.
This is what they claimed to have put in the car on my second visit to try and resolve this.
The Toyota 75W is a GL4 with a KV@40*C of about 30 cSt or thereabout .
This Mobilube HD 75W is a GL5 with a KV@40*C of about 92 cSt , a real 75W90 .
The foreman's comment: "the Asian oils aren't that good compared to North American...." is indeed 'valid', in the context of gear/bearing components protection typical of gear oil requirements .
But unfortunately your concern isn't on components protection , but smooth shift in particular in cold . Hence it's double whammy on you .
Except the shop foreman's comments are NOT correct in the context of this situation. Toyota didn't spec fluid that is going to deliberately cause issues with gear engagement on a
mass market car that is a significant part of their business,which the Corolla is around the world, and I don't even agree that asian oils aren't as good as US brand gear oils.
The shop showed negligence and gross incompetence when it installed a gear oil that isn't viable in any way for this application, not only that it could damage synchros as well.
The owner should still contact TM Canada by certified mail and open up a case on this issue. It should be documented for the future in case there is a serious failure just out of warranty, which I suspect there might be, since what he describes is NOT "normal" notchiness in cold weather. His rental car which is an identical transmission seems to be normal.