I searched the forum for info here, as I thought I had previously come across a discussion on the Allison TES 295 standard on BITOG (been lurking for years), but I guess I was mistaken.
I'm trying to source a TES295 approved transmission fluid for my '5 duramax/allison 1000. The best lubricant house in town is a Chevron dealer, and Chevron is the only major manufacturer who hasn't ponied up for TES certification in their heavy duty synthetic trans fluid ( Delo Syn ATF HD , in this case) but they use royal purple-ish language "It is suitable for Allison TES-389 standard drain and
Allison TES-295 extended drain service; however, it is not approved by Allison for these applications."
I've always used the DELO line of 15w40 for this truck, and it's a pretty respected fleet brand, so it caught me off guard that they hadn't certified their ATF. I'm wondering if maybe it won't pass the extended oxidation tests TES295 requires. I'm not up on the full test battery, but from what I understand, it's pretty rigorous on issues pertaining to extended drain interval.
Transynd has gotten very expensive and I haven't found any locally. MOBIL Delvac 1 synthetic ATF is the cheapest of the licensed TES295 fluids I could find online currently $189+$16 shipping :https://www.thelubricantstore.com/mobil-delvac-1-atf-5-gal-pail
If anyone in Central TX has found a local source for a TES295 approved fluid around the $210/5gal mark, I'd be glad to hear of it.
I'm trying to source a TES295 approved transmission fluid for my '5 duramax/allison 1000. The best lubricant house in town is a Chevron dealer, and Chevron is the only major manufacturer who hasn't ponied up for TES certification in their heavy duty synthetic trans fluid ( Delo Syn ATF HD , in this case) but they use royal purple-ish language "It is suitable for Allison TES-389 standard drain and
Allison TES-295 extended drain service; however, it is not approved by Allison for these applications."
I've always used the DELO line of 15w40 for this truck, and it's a pretty respected fleet brand, so it caught me off guard that they hadn't certified their ATF. I'm wondering if maybe it won't pass the extended oxidation tests TES295 requires. I'm not up on the full test battery, but from what I understand, it's pretty rigorous on issues pertaining to extended drain interval.
Transynd has gotten very expensive and I haven't found any locally. MOBIL Delvac 1 synthetic ATF is the cheapest of the licensed TES295 fluids I could find online currently $189+$16 shipping :https://www.thelubricantstore.com/mobil-delvac-1-atf-5-gal-pail
If anyone in Central TX has found a local source for a TES295 approved fluid around the $210/5gal mark, I'd be glad to hear of it.