Ronmar
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Yes, I believe those ratios from the Allison 3700 brochure are for the trans and transfer combined. The transfer adds that 1.2:1 to ALL the gears output from the transmission(1-7 and R) 1st gear is generated in the transmission, as it must be to drive the P3 planetary carrier which drives the primary gear in the transfer case.
Looking at the ratios for reverse though, I just realized there must be difference in the P3 ratios between the 3060 and the 3700. it is shown as 5.03:1 for the 3060(without 1.2 from the transfer) and 5.0 on the 3700(with 1.2 added from its transfer). So either our reverse is actually 6.03:1 Or the output from the transmission is a lower ratio in reverse to get the 5.0 after the 1.2 is added... let me look up some part numbers and see if I can find some tooth counts to answer this question...
Looking at the ratios for reverse though, I just realized there must be difference in the P3 ratios between the 3060 and the 3700. it is shown as 5.03:1 for the 3060(without 1.2 from the transfer) and 5.0 on the 3700(with 1.2 added from its transfer). So either our reverse is actually 6.03:1 Or the output from the transmission is a lower ratio in reverse to get the 5.0 after the 1.2 is added... let me look up some part numbers and see if I can find some tooth counts to answer this question...
