4 to 1 Low gear

bugnout · **Posted:** Fri May 02, 2008 10:42 am

Anyone familiar with this product? Looks like an old link, may not even be available still, but would be nice to have an the gear reduction for 4Lo

http://www.4x4now.com/4to1.htm

daspes · **Posted:** Fri May 02, 2008 2:05 pm

I think I would prefer a Klune-V.

GaCRD05 · **Posted:** Fri May 02, 2008 3:21 pm

Looks interesting. Wonder if they're still around. It'd be cheaper than swapping to an Atlas, Klune, or RockTrac. Ahhh, dreaming of 4:1 offroad with the torque of the CRD. It'd be great!

tjkj2002 · **Posted:** Fri May 02, 2008 3:47 pm

For the price of doing a 4:1 reduction kit in a 231/242 you can almost do a RockTrac swap and then have a much stronger t-case to start with.Most 4:1 kits are like $1100-$1400 just for the kit,then you got to do the install or pay for the install.

From the web link..........

$1350 just for the kit.New RockTrac is about $1700-$1800(depending onwhere you live for shipping) and can easily be swapped with basic hand tools and modest wrenching skill,though new F/R drive shafts will be needed,but doing the 4:1 reduction kit will reqiure a new rear drive shaft anyway.

bugnout · **Posted:** Mon May 05, 2008 2:16 pm

I know, the 242 isn't the strongest unit, but I really like full time 4wd, and don't want to lose it.

I've also heard that the Military Hummers use a version of the 242, the 242AMG that gives full time and is a bit beefier. Not sure if they geared lower or not.

Anyway, I'm going to see if I can track down these guys. I found myself having to feather the right pedal quit a bit out at Moab which resulted in a little bit of surging and not the best throttle control. 4:1 would definitely give me better speed control when crawling.

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

Maybe I am just a party pooper but isn't 2.72 good enough for your average 2.5 inch lifted KJ? I can't see spending the cash on a transfer case unless it breaks or is worn out, or unless you have already upgraded everything else. I can see why people with bigger tires would want them, but not someone with a 2 inch lift on 31's.

Funny thing is that people don't use 4-Low as it is. I have to stop and hold people up a second to put it in 4-low. After that at least I don't have to crawl down a hill burning my brakes at 5-12 mph when with the 2.72 it will go down it with little to no brakes. I always see solid brake lights in front of me. People always put it in 4-low over biig obstacles, but when you speed is 10mph or less, why not just leave it in 4-low and be done with it?

tjkj2002 · **Posted:** Mon May 05, 2008 8:44 pm

Pablo wrote:

Maybe I am just a party pooper but isn't 2.72 good enough for your average 2.5 inch lifted KJ? I can't see spending the cash on a transfer case unless it breaks or is worn out, or unless you have already upgraded everything else. I can see why people with bigger tires would want them, but not someone with a 2 inch lift on 31's.

Funny thing is that people don't use 4-Low as it is. I have to stop and hold people up a second to put it in 4-low. After that at least I don't have to crawl down a hill burning my brakes at 5-12 mph when with the 2.72 it will go down it with little to no brakes. I always see solid brake lights in front of me. People always put it in 4-low over biig obstacles, but when you speed is 10mph or less, why not just leave it in 4-low and be done with it?

When on a trail I never leave 4-low,I like crawling at 2-3mph,doesn't hurt my back as bad.Plus 4low is a must here in CO on the trails,we all use 4low on the trails out here and not just us KJ guy's but all wheelers.

And no 2.72:1 low isn't enough :wink:

..............not to me at least.

Quote:

bugnout

I know, the 242 isn't the strongest unit, but I really like full time 4wd, and don't want to lose it.

I've also heard that the Military Hummers use a version of the 242, the 242AMG that gives full time and is a bit beefier. Not sure if they geared lower or not.

Anyway, I'm going to see if I can track down these guys. I found myself having to feather the right pedal quit a bit out at Moab which resulted in a little bit of surging and not the best throttle control. 4:1 would definitely give me better speed control when crawling.

The H1 uses either the 242AMG or the 218 t-case,both HD units,but both only have 2.72:1 low range,and niether will bolt in the KJ.

Time for the 241 RockTrac,only $1700..........or maybe a AtlasII t-case,can get 2:1,3.8:1,4.3:1,5:1,6:1,and then theres the 4 speeds that can go all the down to 10.34:1 :shock:

.

I got a 4.3:1 AtlasII sitting here behind my couch,just screaming to be installed :twisted:

.

KW AV8R · **Posted:** Mon May 05, 2008 9:08 pm

I agree with TJKJ about wheeling in CO. I never leave 4-low when wheeling and find I need lower gearing for more control. On just about every trip I go on, I find myself trying to ease in just enough throttle to work the obstacle and just enough brake to keep my KJ from taking off (at the same time). If I had a 4:1, this would be less of an issue. Of course, I also need a better trans (lower first gear/stronger) and a better torque converter (less slippage/lower stall).

raceinfan · **Posted:** Mon May 05, 2008 9:13 pm

some of the trails we use up here in New England are a MUST for 4 LOw...lots of rock

others though you won't need it but a majority YES...and it is WAY easier on the back & having much more control

scoobysnax · **Posted:** Mon May 05, 2008 10:07 pm

The hummer has a 2nd gear reduction in the wheels. At least I think I remember reading that back when the hummer was first introduced to the Marines. So the transfer case is the first reduction but then there is another set of gears where the axel meets the wheels.

tjkj2002 · **Posted:** Mon May 05, 2008 10:12 pm

scoobysnax wrote:

The hummer has a 2nd gear reduction in the wheels. At least I think I remember reading that back when the hummer was first introduced to the Marines. So the transfer case is the first reduction but then there is another set of gears where the axel meets the wheels.

yes the HMMWV has 2:1 geared hubs,but only run 3.21 gears(3.54 for the newer ones with OD tranny) in the diffs and are turning 37" tires with only a 130-195HP deisel,they only will top out at 60-85mph depending on if you have OD or not.The higher gear stes in the diffs are for strength since 3.21 gears set is stronger then a 5.13 gear set,but the HMMWV uses aluminun F/R diffs that are based of the AMC20 diff,and yes they break all the time,changed many of them.

bugnout · **Posted:** Tue May 06, 2008 11:55 am

Pablo wrote:

Maybe I am just a party pooper but isn't 2.72 good enough for your average 2.5 inch lifted KJ? I can't see spending the cash on a transfer case unless it breaks or is worn out, or unless you have already upgraded everything else. I can see why people with bigger tires would want them, but not someone with a 2 inch lift on 31's.

Well its part of a bigger plan, Just not satisfied with 2" lift and 31's. I need to go bigger :twisted:

2006 KJ · **Posted:** Tue May 06, 2008 1:38 pm

here in PA i've never done a trail without 4lo the entire way... a lot of our trials are very hilly, muddy, and rocky... i remember reading somewhere that the 05-06 Renny 6 speeds have a different crawl ratio that other KJ's... i think when mine is in 4 lo and 1st gear it is a slower crawl than the automatics? i could be wrong. i know when i engage 4lo it ups my idle 500-700 rpm's... locks the driveshafts for 50/50 split.. turns off the traction control... make sit so i can start it without putting in the clutch.. changes the gear ratio...

InCommando · **Posted:** Tue May 06, 2008 3:00 pm

It has nothing to do with the Renegade package. It is just that the NSG370 has a much lower 1st gear.

http://www.grimmjeeper.com/gears.html

Figure your crawl ratio there.....

BTW I never saw this settled: I have seen one or two sources listing the KJ NSG370 as having the 5:1 1st gear of the Dakota & Ram with a 3.7L & a 6spd and others listed them as the 4.46 that the NSG370 had in The 4.)L TJ. inal answer?

Close ratio,lift, tires I have a 43:1 crawl ratio & 48:1 with the wide ratio

KJ Taz · **Posted:** Tue May 06, 2008 3:26 pm

I know in the rubi I loved the 4:1 with the 4:11 gears and 31's and no lift........I wouldn't mind the same set up in the Libby.

DarbyWalters · **Posted:** Tue May 06, 2008 4:16 pm

Somebody did install a Klune V is a KJ a while back...gives you two tranfercases. The David (4:1) and Goliath (2.7:1) and then add your 2.72:1. Of course you will get gear turning torque with 2.7x 2.72 (combo with both operating)

2006 KJ · **Posted:** Tue May 06, 2008 4:18 pm

soo.. this is what i have. not sure what it means..

T-case

NV231HD - only offered in 05-06 rennys
2wd- 1.00:1
4H- 1.00:1
N-NA
4-LO- 2.72:1

Tranny..
NSG370 6-speed

6 forward 1 reverse

1- 5.014:1
2- 2.831:1
3- 1.789:1
4- 1.256:1
5- 1.000:1
6- 0.828:1
Reverse 4.569:1

3.73:1 axle ratio...

Tires are 265/75/16

someone help me make some sense of this.

InCommando · **Posted:** Tue May 06, 2008 4:44 pm

You might check your gear ratio's..... I believe that the NSG370 got you 3.55's instead of 3.73's. That is in all of my '05 literature, anyway. For gassers, 3.73 with auto's and 3.55's with 6-spds.

At least in '05, ALL 6-spd's received the 241 x-fer, which is essentially a HD version of the 231, but carries a diffferent product number and a much wider chain. I can ga=run-tee that 6-spd Sports had the 241. Crawl under your jeep and look for a gear-shaped red & sliver tag on the x-fer & facing the rear of the jeep on the driver's side. I think you will read NV241J. The 241 is, allegedly, a 1/2 ton rated x-fer and I step up from the 231, which was only used in light vehicles. Although I have not crawled under any, I was told the 1500 Rams got the 241. I have heard the 241 described as a HD 231, but it is a seperate product, apparently.

IF you have the wide-ratio 6-spd, benefit of the doubt 3.73's, and 32" tires you have a crawl ratio of 50:1

If you have the more likely 3.55's, your crawl ratio is 48:1. Very close either way.

That web-site I linked has the easiest, most comprehensive gear calculator I have found.

Sorry if I am wrong, but I have read several times that the Renny pkg didn't get you anything drive-train wise that every other KJ didn't have for the same years.

daspes · **Posted:** Tue May 06, 2008 8:48 pm

DarbyWalters wrote:

Somebody did install a Klune V is a KJ a while back...gives you two tranfercases. The David (4:1) and Goliath (2.7:1) and then add your 2.72:1. Of course you will get gear turning torque with 2.7x 2.72 (combo with both operating)

Darby do you remember who did it?

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

daspes wrote:

DarbyWalters wrote:

Somebody did install a Klune V is a KJ a while back...gives you two tranfercases. The David (4:1) and Goliath (2.7:1) and then add your 2.72:1. Of course you will get gear turning torque with 2.7x 2.72 (combo with both operating)

Darby do you remember who did it?

It was for sale in the for sale section on here awhile back. It was originally a 4wd sport utility magazine write up. I don't know if it ever sold, but it was listed as 231HD/Kune V David (4.1) and JE Reel drive line. I would imagine that would set you back some cash.

4 to 1 Low gear

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