Topic: questions about t-case gears!

[brad091703]

Hello, Okay i have an 84 pick up with the 22r and the 5spd.. now i have 4.88s in the axels. and i need more crawl power! now, two questions, what trans do i have and what transfer case do i have?            now what would be better? and what would be cheaper?  dual cases?? or do those 4.70 gears and just leave one case? i dont really wanna do the two cases cause then i have to do driveshaft work, doing dual stock case would bring me around 4.30s? right... let me know... thanks guys!!!

[synwars]

I'm thinking it is cheaper in the long run to do 4.7 gears. No DS modifications needed, no crossmember needed, no spare t-case needed.

Dual cases would bring you to a t-case crawl ratio of (2.28x2.28) 5.198:1 when both are engaged.

[tt21]

just do the 4.7 gears in your single t-case.  Just did that to my truck and love it.  pretty easy install as well.

reasons for me doing this is:  -planning on lifting my truck in the spring, so i didn't want to have to modify DS twice if i went with duals
                                        - when i do go to duals when i lift it i will be modifying DS once, and when i do duals i will have an ultimate crawl set up 223:1 crawl ratio

that is my reasoning for only doing 4.7s in single case right now.  right now i have  a crawl ratio of 72:1, if you were to just do single 4.7s you would have a crawl ratio of 89:1.  reason being you have 4.88 gears in your diff. and i have 3.90 gears in mine

[tt21]

Also here:        http://www.marlincrawler.com/htm/transfercase/gearvschain.htm

is where you can determine what t-case you have!!

[brad091703 [OP]]

cool thanks guys, should i maybe do those like 4.97s?? i think thats what they are.  are they as strong?

[synwars]

Some info: 4.97:1 is an AA product. They do not have the Total Spline technology like on the 4.7 gears.

It's really personal preference. For one tooth more, why not?