# 1990 dodge d250 cummins **URL:** https://forums.speedlife.net/t/1990-dodge-d250-cummins/267820 **Category:** Builds **Created:** [October 7, 2013, 5:16pm UTC](https://forums.speedlife.net/t/1990-dodge-d250-cummins/267820 "2013-10-07T17:16:04Z") **Posts on this page:** 1 **Showing post:** 47
### Author: ![toomanycamaros](https://avatars.discourse-cdn.com/v4/letter/t/7993a0/32.png) [@toomanycamaros](https://forums.speedlife.net/u/toomanycamaros) #### Post date: [October 18, 2013, 8:41am UTC](https://forums.speedlife.net/t/1990-dodge-d250-cummins/267820/47 "2013-10-18T08:41:38Z")
> [@Ball Washing Service In Buffalo?](https://forums.speedlife.net/t/ball-washing-service-in-buffalo/53565/11): > > lol, yeah the allison trans is super spensive. Then there’s the wiring and control for the damn thing. I would drop an NV5600 into it 😉 Unless he wants to do a lot of heavy load towing there is no benefit to at 5600 over a 4500. The first gears and final drive ratios are virtually the same. Both units have a 1.1 4th gear the only advantage of the 6 speed is that 5th gear is an inbetween 1.1 and final drive. Which is really only an advantage if your towing over 10k pounds a lot. That and the fact that 5600s are harder to find and more expensive, I would go 5600. --- _[View the full topic](https://forums.speedlife.net/t/1990-dodge-d250-cummins/267820)._