Calgary Jeep Association
4x4 Related Groups => Tech Talk => Topic started by: rocnrol on March 09, 2010, 08:32:20 PM
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heres a low buck idea i did to my cj-5 a few years ago that worked out awesome. combined with a t-18a and 4.10's, i ended up with a crawl ratio of 64:1. dana 20's stock have a ratio of 2.03:1, marginal at best. the older dana 18 was 2.46:1. much better. the only thing is the d18 is missing the rear center out put, and there for is missing a gear to fully swap them into your d20. in comes the early bromco dana 20. from the outside it looks different from a jeep d20, and on the inside it shares more with the d18, namely the ratio. so what you need is the rear slider from one of these cases to make the whole thing work in a jeep d20.
now i wasent able to find a used d18 with the right gears, but i was able to buy a brand new set from national for around a couple hundred if i rember right, far cry from the $1100 for a 3.15:1 kit for a d20. i had a buddy with the bronco gear, allthough i am sure that one could be sourced as well. i never did do a write up on it but here is a link to the exact source i used to do mine.
http://www.jeeptech.com/convxfer/2.46-20/ (http://www.jeeptech.com/convxfer/2.46-20/)
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oh yeah, i forgot to add........ i allso used a factory scout dana 20 twin stick set up on it which i got for next to nuthin at good ol pyp, and it is set up right now to shift in to two low rear. i could allways go in and remove the other pellet and be able to get two low front. 8) 8)
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neato! you dont get this sort of tech info around here much cause 95% of the jeeps that visit this site have an np231. there was all sorts of cool swaps you could do on the older t/cases. not to mention the 4 speed trannies that were offered back in the day. 7:1 fist gear sounds nice:)
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thanks, i know ther is not a lot of the older stuff out there, but there is some. but dont think the ol 231 cant be used in the same sort of low buck tech idea..........
does this look like any thing you might have seen.....
(http://members.shaw.ca/foreweb/crawl_20.jpg)
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ive seen a few people run this with a dana300. the problem was getting the right dummy shaft that runs inbetween the two. had to have a machine shop put one together.
again, very cool idea.
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woops, im thinkin that IS a dana300...
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I'm thinking of doing the Dana 20 "Bronco/18 low gear build" myself. Thanks for another link of info on it to add to the pile. :)
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hey dunl, i say do it, you will love the rusults. hps4evr, that is a 231 doubler to a d300 in that pic. for the right person, that would be a very cheap doubler to build, even if you have to get a custom shaft made. there are a few places selling the whole kit, and i am pretty sure one could just by the parts needed seperatly. mad rooster comes to mind as does the fox-box of of island 4x4.