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  #1  
Old 08-22-2011, 12:36 AM
kx250kev kx250kev is offline
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Default Does my 2011 ram 1500 4x4 have a real low range?

Does the transfer case have a true low range, or are they just locking the tranny in 1st gear when 4low is selected? It didn't feel like a true low range when I played around with it.
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Old 08-22-2011, 01:08 AM
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Yeah, it is low. I ran my truck through the gears in Low Range when I was up in the North Carolina Blue Ridge mountains last month. Was a great help. Lots of power to go up steep dirt roads.
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Old 08-22-2011, 02:11 PM
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It's not "gear reduction" low like you get with a large truck.
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Old 08-22-2011, 03:24 PM
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Originally Posted by MADDOG View Post
It's not "gear reduction" low like you get with a large truck.
The NVG 243 and NVG 246 Transfer Case's in the 4G 1500 Rams most certainly DO have a planetary "Gear reduction".

Low Range reduces your 1:1 Hi ratio to 2.72:1

http://www.allpar.com/model/ram/dodg...owertrain.html

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Old 08-22-2011, 03:26 PM
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Yes it does! I've used 4x4 for clearing some land. With my 37s 4lo made a significant different in torque. Also I've drove on the beach in 4hi and 4lo. Again there is a difference and you can also change through yours gears as well
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Old 08-22-2011, 03:43 PM
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I've cracked open my share of New Process (NP231's) and NVG (New Venture Gear) transfer cases
Rebuilt almost all my Jeeps with a short shaft SYE kit, and 2.72 is plenty low enough for most off road situations provided you manually shift to 1st gear for crawling.
If you let the auto up-shift through the trans gears it wont feel "low" until you max out the trans at about 40/50mph.

Extreme Crawling usually calls for a 4:1 transfer case reduction kit or a Klune -V to further reduce ratios
and very rarely would you use anything beyond 2nd gear on your transmission.








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Old 08-24-2011, 01:40 PM
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Thanks everyone
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Old 08-30-2011, 03:17 AM
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1) NICE jeep, nice wheeling pics, how are you able to wheel and keep your jeep clean while wheeling? lol

2) wondering if could explain in dumbed down terms, gear reduction vs "true" low gear. tks
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Old 08-30-2011, 10:25 AM
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Rock crawling, wall climbing = no mud = clean Jeep
I used rock crawling as a demo because very low gear reduction is not much use in mud where you need more wheel speed to fling mud out of the treads and maintain forward momentum.
...on a mud/muskeg run you usually cant even tell what color the Jeep is under the slop. I was a Jeep Jamboree TrailGuide for 10 years in Alberta/B.C. ... believe me I've seen it all.
Been upside down a few times and ran through rivers over my hood ....that washes some of the mud off



anyway, back on topic , Gear reduction "dumbed down"

It works very much like a mountain bike (with multiple front/rear sprockets )
the rear sprockets on the bikes rear wheel represent your transmission gears (1-5)

ALL stock 4x4 Rams (and Jeeps) have a Hi and Low range transfer case, Low is a "true" planetary gear reduction
represented by the two sprockets attached to the mountain bike pedals. (smaller sprocket is Low, larger one is Hi)

To climb the steepest hills you need the smallest gear up front (transfer case low range)
and the tallest cog on the rear sprocket (1st transmission gear)... and yes it is a true gear reduction...for the bike and the Truck/Jeep etc.
In Low range it takes several engine revolutions (or pedal strokes) just to get a single rear wheel/tire revolution.
This allows you to bring the engine revs up earlier, without stalling due to the increased work load, and brings the engine into its power band for climbing obstacles.

Doing it the opposite way does not get the engine into the power band because the revs are too low to reach peak torque and you stall out.
Hi range is the equivalent to using the Larger gear up front, smallest gear out back more suited for higher speed/downhill run.

A 4:1 reduction kit simply swaps your smallest front low range cog out for one with even fewer teeth than stock low. Giving you a 4:1 ratio instead of 2.72:1 gear reduction in low range, 4 Hi stays the same.

a Klune-V is an extra gear reduction step between the transfer case and the rear final drive that can drop ratio's to 11:1.
...that's a little harder to explain using the bike example but the end results would be like keeping the bikes two front pedal sprockets stock, but adding a third smaller sprocket with an even lower number of teeth.
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Old 08-30-2011, 11:30 AM
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Quote:
Originally Posted by BlackRamHemi View Post
I've cracked open my share of New Process (NP231's) and NVG (New Venture Gear) transfer cases
Rebuilt almost all my Jeeps with a short shaft SYE kit, and 2.72 is plenty low enough for most off road situations provided you manually shift to 1st gear for crawling.
If you let the auto up-shift through the trans gears it wont feel "low" until you max out the trans at about 40/50mph.

Extreme Crawling usually calls for a 4:1 transfer case reduction kit or a Klune -V to further reduce ratios
and very rarely would you use anything beyond 2nd gear on your transmission.









My cousin took my old YJ and did a 5k clutch drop over something stupid he shouldn't have been driving over and actually snapped the chain in the NP231!!!! Couldn't believe that was the weak link in the system. He proceeded to sheer off the u-joints, and destroy the rest of it within months but thats another story. Random story.

Lets return to our regular programming.
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