after hours of reading threads on changing out differential, transfer, and transmission fluid, I decided to go with Amsoil. Both their website and local dealer stated I can not use Amsoil's gear oil 75w-90 in my transfer case since Toyota recommends Toyota transfer case oil 75w. Despite what many people have done and said on this forum, I opted to get the facts from a local dealership. I went to the largest Toyota dealership here in San Diego. I asked several parts guys about the transfer case oil and they told me they do not carry it, nor have they ever heard of it. I was sent to service where I spoke to a service manager who spoke to other guys and said the same thing. One of them even stated they think they put 75w-90 but did were not sure. They said they use whats in the barrel, and when I asked to confirm that it is indeed straight 75w, they said they couldn't find it and were not sure. after about an hour of them talking to each other, phone calls, and checking their computers, they stated they have to special order this from Toyota at $53 a quart. I also asked about recommending another gear oil besides the recommended Toyota brand since its $33 a quart, and a couple of them told me I can't use anything else.
Its frustrating and unbelievable that when I ask a professional that does this on a daily basis, they can not answer what I feel is a simple question. Everyone I spoke to was unsure and looked to the next guy to help him out. All I want is to ensure that what ever I put in will not do harm.
Its frustrating and unbelievable that when I ask a professional that does this on a daily basis, they can not answer what I feel is a simple question. Everyone I spoke to was unsure and looked to the next guy to help him out. All I want is to ensure that what ever I put in will not do harm.