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post #1 of (permalink) Old 05-17-2005, 05:37 PM Thread Starter
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Gearing tooooooo low ?

question of the day....

since my tranny is going slowly, i've been considering tossing in a NP435 4 speed to replace the AX5....my current first gear is 3.93 and 2nd gear is 2.33

the 435 has a first gear of 6.68 and a 2nd gear of 3.34, 3rd gear is 1.66

there are times as my jeep is set up, that i use 2nd gear on the trail

has anyone ever had the problem of being geared tooo low?

lemme know opinions, I've never driven a vehicle that low geared
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post #2 of (permalink) Old 05-17-2005, 05:46 PM
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Re: Gearing tooooooo low ?

Don't know what the gearing is on the Rubi, but the 4-1 is really cool. Spent much of the day at the Badlands in 3rd. Used 1st for some of the really steep downhills. Makes me think about things like the Klune-V or doing the 4-1 on the YJ and/or the Commando...
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post #3 of (permalink) Old 05-17-2005, 06:25 PM
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Re: Gearing tooooooo low ?

I love the 6.32 in my T18 and figure it's one of the best features of my Jeep. Wouldn't part with it for all the tea in China. It lets me pick exact lines around obstacles, and makes it much easier to walk off a step, or climb one. In tough, tight places I just set the hand throttle and concentrate on steering - no brake, no clutch, no gas pedal to mess with. Only downside is that in a crowd there's always somebody waiting for me. You should have said something - I'd have let you drive it.
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post #4 of (permalink) Old 05-17-2005, 07:55 PM
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Re: Gearing tooooooo low ?

ditto what Jim-Lou said... but I don't know if I'd let anyone drive mine [img]/ubbthreads/images/graemlins/wink.gif[/img]
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post #5 of (permalink) Old 05-17-2005, 08:06 PM
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Re: Gearing tooooooo low ?

Its all in what you want Greg but I think the granny low is the way to go. Hey that even rythmes!! That 6.38 low will get you a lower crawl ratio with your stock NP231 than what you'll get with your AX-5 and a 4to1 kit. By doing this your also spending money on the transmission you need anyway rather than both. Plus if you do this and you do think your geared too low its just a good excuse to get bigger tires. Anyway thats the route I'm gonna take!!
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post #6 of (permalink) Old 05-17-2005, 08:18 PM
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Re: Gearing tooooooo low ?

Ditto....
The lower gear allows you to drive in ways that your couldn't before....you will find that you don't have to 'attack' an obsticle.....you can drive with more finesse.
post #7 of (permalink) Old 05-17-2005, 08:50 PM
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Re: Gearing tooooooo low ?

You do understand that youll no longer be using 1st on the street, right? You are trading your 4 speed for a 3 speed with an additional granny low.

A lot of trucks have 2nd gear labeled as 1st, and 1st is labeled with an L for low. L is not normally used.
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post #8 of (permalink) Old 05-18-2005, 01:18 AM
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Re: Gearing tooooooo low ?

BTW my Jeep has a crawl ratio of around 50:1 - 6.32 X 2.23 in the transfer X 3.54 axels - which is slower than comfortable walking speed. Zach is building a new rig with two transfer cases in series. He says the crawl ratio will be in the neighborhood of 200:1. I think THAT might be too low.
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post #9 of (permalink) Old 05-18-2005, 07:32 AM
 
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Re: Gearing tooooooo low ?

but with dual cases i am not limited to that ratio in low range at all times
final drive ratiosn of T case range in 1st gear

i will have a 1st gear double high 1:1 at the wheel. 20.52
a first gear 2.2 T case low range at the wheel 45.144
a first gear 4.7:1 T case low range wtih at the wheel 96.44
and a first gear 10.34 T case low range with 212 at the wheel
i have many choises on what my gearing will be with dual cases, espically with each case havign different gearing.
with 20 foreward gears i am shure i can find one for the situation. with drivetime in the seat i will become good and have a good idea on what gear i need before i hit the obstacle.
in the giant boulder gardens i will be using double low and that proobably the only spot it will be used.
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post #10 of (permalink) Old 05-18-2005, 08:35 AM
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Re: Gearing tooooooo low ?

Jim, the dana 20 is 2.03:1 low range. 45.417:1
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