Talked to the shop and they said they can add the additive to their house brand to make it compatible, and if I don't like that, they will use genuine ATF+4. Will obviously go for the real thing for $149. Includes flushing out old fluid, filter change, gasket, etc. I got the service done about 4 years ago and watched the mechanic the whole time, as I was under the hoist with him. Must say he was very thorough and did a top-notch job. Cut apart the old filter and wiped out the pan as well. Not what a typical shop would have done, imo.

 

watch em. some transmission shops will us their cheap dexron fluid and lie to you. if you don't see brand new bottles of atf+4 going in, then they didn't use it.

also - if they use a pressure flusher, i don't know how the fluid is put in. i prefer just a drain and fill. you can do it yourself for about $50-60.

 

Unless your tranny fluid has been changed every 30,000 miles or so, flushing it is going to cause problems...

 

I bought the truck brand new in '98 and have had the trans flushed twice at this same shop. 3rd time will be soon. 175,000 miles. Its not a power flush, but just a complete fluid change. Truck up on hoist, remove pan and filter, hook up shop's oil supply line to the tranny pick-up, and let the truck idle in neutral for about 5 minutes or so. All fluid drains into catch barrel. That's how they did it last time anyway when I watched the entire process.