Allison & Transfercase Ratios

[BluegrassDiesel]

Does anyone know all 6 gear ratios of the allison? Also would like to know the low range ratio of the Tcase.

Thanks
Josh

 

[duratothemax]

the ratios of the 6 speed allison are the same as the 5 speed, with the additional 6th gear (double overdrive) being .61

This is completely off memory, Im probably wrong on some of those. 4th, 5th and 6th gear I know im right on, but the others Im not 100% sure.

5 and 6 speed allisons

reverse is 4.something. 4.49 rings a bell??

1st gear 3.10
2nd gear 1.81
3rd gear 1.41
4th gear 1.00
5th gear .71
6th gear .61

NP261/263 xfer case low range is 2.72

ben

 

[zstroken]

Those sound right, I knwo the allison 3rd gear is almost identical to the dodge second.

 

[SmokeShow]

yep, those are correct and reverse is 4.49


C-ya

 

[BluegrassDiesel]

Thanks guys. Just curious to see what kind of wheelspeed a lot of the DMaxes run on the pullin track. I know a lot of them run 3rd gear, except for a few that can hit 4th.