Forum Discussion
camperdave
Jul 28, 2020Explorer
If you've got an older (05 or older) class C with the 4R100 (4 speed), the five star tune will make a noticeable difference in transmission performance alone. Can't say it did very much for the engine, maybe it did but definitely not huge, but the change in transmission shifting behavior was worth it in my old van (1998).
I have not modified my 04 (4R100, ~13k pounds loaded, and it does just fine out West), but I might just for the transmission performance improvement alone.
I have not modified my 04 (4R100, ~13k pounds loaded, and it does just fine out West), but I might just for the transmission performance improvement alone.
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