10R80 - 3.15 vs 3.31

[Jed S.]

Need to replace/repair my diff, good ol’hum coming from it. Was wondering if anyone has went to a 3.31 with the 10R80? Or went to a iron housing with a 3.15 gear? Have a ‘18 Whipple car making around 800whp and 650ftlbs.

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[olaosunt]

I did .
Also have a Gen 5 whipple .

Went from 3.55’s to 3.31 /iron assembly I had lying around to keep from going in to 7th before the traps .
If I did not have the 3.31 I would have gone to 3.15 as I think it Let’s you stay in the numerical higher gears /ratio longer and hence go faster ... at least that’s my theory .

 

[armykyle1 [HACKED ACCOUNT]

I did .
Also have a Gen 5 whipple .

Went from 3.55’s to 3.31 /iron assembly I had lying around to keep from going in to 7th before the traps .
If I did not have the 3.31 I would have gone to 3.15 as I think it Let’s you stay in the numerical higher gears /ratio longer and hence go faster ... at least that’s my theory .

Old thread, but what did you use to program the vehicle?

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