Synthetic ATF?

[dchawk81]

Is it worth running synthetic ATF in a 1998 with the 4R100 transmission?

What are the benefits? Can the change interval be extended the way synthetic oils in the crankcase can?

[djfllmn]

yea the interval can be extended...syn doesnt break down as easy as conventional ATF

[dchawk81]

Any idea how long the interval would be? Is it double?

[djfllmn]

id say maybe 15-20k longer

[dchawk81]

Hm. Now I have to decide whether it's worth the premium cost. I can use tradional old Mercon cheap. Mercon V is more expensive, and synthetic even moreso.

[dchawk81]

Looks to me like Valvoline Maxlife is the best compromise for the transmission and transfer case.