ATF+4 or 8&9 Speed ATF transmission fluid?
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Junior Member
Joined: Jan 2011
Posts: 5
Thank you for responding. After much research it seems that Valvoline MaxLife and ATF+4 are the most talked about on the various chat lines to use for Chrysler 300 transmission fluid.
Can you explane the differences between the two.
Thank you.
Can you explane the differences between the two.
Thank you.
Senior Member
Joined: Oct 2020
Posts: 586
From: Chicago, IL
I believe the 8-speed transmission was the only trans available on the 2015 300. Use 'auto-shift' to confirm. While driving at highway speeds, put the shifter into auto-shift. The PRDNL display should show a boxed number. Bump the shifter to the '+' and the number should increment. Keep bumping until the number no longer increases. If you see 7 or 8, you have the 8-speed.
As for fluid, do not use universal fluids. Use the manufacturer specified atf only, licensed ZF only. Note it is expensive.
As for fluid, do not use universal fluids. Use the manufacturer specified atf only, licensed ZF only. Note it is expensive.
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