well larry the jeep is done

[Lloyd Smale]

got synthetic in the transfer case and transmition. It seems to shift real smoothly. I dont know if its just my imagination or not but it seems smoother. One more question for you though. I use that lubeguard additive you recomended in the tranny. I see they make it for automatic transmitions too. Im about to change the filter out on my 06 silverado. It takes a dextron VI transmtion oil. Is that additive going to be safe in that tranny and do you think its worthwhile in a auto transmition

[Larry L]

Is it safe- yes. Would I use it- no. An automatic is a different application and everything that the transmission needs is in the Dextron spec. As long as you change it on time, there's no need for any additives.

[Lloyd Smale]

its got 70k on it. Am i still within the window to change it.

[Larry L]

That's going to be an iffy thing. The truck is 7 years old with 70,000 miles on the clock. There's going to be some varnish build up that a new fluid is going to dissolve. How much, I don't know but if it's a lot, yer gonna have seal leaks. You can give it a try and if no leaks, you lucked out.

You are looking for Dextron 6 in that truck. It's backward compatible with your truck. The original formulators and factory blenders of real Dextron 6 would be Mobil, Chevron, Kendall, Conoco-Phillips, and Havoline. I suggest using those brands only. While I believe the original ATF spec for that truck was Dextron III, you might find a high mileage ATF Dextron III but none of the original formulators makes one. Castrol I think and Valvoline are about the only two that make one.


It's an iffy kinda thing changing it so it's yer decision to throw the dice. I wish I could give you better advice.

[Lloyd Smale]

thanks larry