I know this has been discussed countless times, but most of the threads are many years old now, and I want to make sure I am not overlooking an important detail. I have a 2006 LBZ Duramax with the Allison 1000 6-speed transmission. The truck has around 60k miles and the ATF has never been touched. I am looking to do the double drain and fill method to get some fresh fluid in there. I am assuming the tranny has Dexron VI in there now, but I am not for sure. I plan to drain the pan and change spin-on filter, drive truck for 20-100 miles and repeat. So I have a couple questions...
1. What fluid can I safely use? I use Valvoline MaxLife Multivehicle in a few other cars I have, so I'd love to use that, but I read a lot about TES-295 and now TES-668 spec fluids. I know I am being cheap, but the official stuff is PRICEY. Any good bargains on that stuff out there? What about this stuff on Wal-Mart's website. Sinopec Multi-Vehicle HD ATF
2. My research says to just to a double drain and fill, no need to drop pan and change internal filter. Is this still best advice?
Thanks for all the knowledge that BITOG has brought me over the years.
-J
1. What fluid can I safely use? I use Valvoline MaxLife Multivehicle in a few other cars I have, so I'd love to use that, but I read a lot about TES-295 and now TES-668 spec fluids. I know I am being cheap, but the official stuff is PRICEY. Any good bargains on that stuff out there? What about this stuff on Wal-Mart's website. Sinopec Multi-Vehicle HD ATF
2. My research says to just to a double drain and fill, no need to drop pan and change internal filter. Is this still best advice?
Thanks for all the knowledge that BITOG has brought me over the years.
-J