[Nylan Hossley]

I have a 2015 challenger rt 5.7 8- speed and I'm stuck in between the 3.73 gear ring and 3.92 gear ring. Any suggestions? Drag radials will be put on before I go to the track

 

[Frank Julian]

Let me know how it works out when you get it done.

 

[Slidd]

The new ZF ratios are 3.70 and 3.90, the other ratios you mention are for the older Getrag last used 2014.

I'd go with the 3.70. With the A8 and its 4.71 low gear cant imagine you even need that much gear, the 3.90 would be too much imho and should be able to find a good used 3.70 Hellcat takeout.


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[Nylan Hossley]

I'm about to go check the 3.70 out right now and see where I can order it from. Thank you! I'll let you know how I like it

 

[19johned53]

Remember that the '15+ cars will need the complete pumkin to swap gear ratios.

Can't buy just the gears.