Northern Utah BS thread
I knew it was geared low, but wow! What cases is he running, & at 223:1 how often do you really use low low?
That's a nice setup tho not that you would use low low all that much, but (& correct me if I'm wrong) the options of having 47:1, 98:1, & 223:1 would be real nice!
I might take you up on the offer to drive her chandler... granted she ever gets outta the garage
That's a nice setup tho not that you would use low low all that much, but (& correct me if I'm wrong) the options of having 47:1, 98:1, & 223:1 would be real nice!
I might take you up on the offer to drive her chandler... granted she ever gets outta the garage

When I broke all the studs on my hub back on that Lil Moab trip. i was in double low. Not even moving and the force spun the hub 15 feet behind me. Low is all torque. Sucks when ya need tire spinning horses.
CF Veteran
Joined: Sep 2010
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From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
Remember the first 231 does not have a chain, its just the planatary.
I will most likely end up with 231-231, 2.72 in front and 4-1 in back... only using 4-1 when I need to... 231 is a strong case for a factory case. btu with 35+ tires and 180+ crawl reduction things start to show the weak link. Last thing you want to fix on the trail is a T/case,motor,trans, LOL
Senior Member
Joined: Jan 2010
Posts: 855
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From: Taylorsville, UT
Year: 1999
Model: Cherokee
Engine: 4.0L
If you do an Atlas...yes 
If you want to try a 4:1 in the transfercase, you should be able to accomplish it for much less than that. A kit would be $800 - $1200 new. But if you can find either a NP231 or a D300 that has one in it already, it would be cheaper. Most (or all as far as I know) D300's need to be run upside down, since they came in rigs with passenger side pumpkins. The NP231's are more straight forward.
While the planetaries CAN burn up in them if you go too fast, they are no death trap. You just need to be good about switching to high range when you get out in the open and want some speed. If you stay out of 4th and especially 5th gear in low range with a NP231 4:1, you should be fine. When we are both on the trail some time, you can ride in my rig and I can show you the difference between 2.72:1 and 4:1. It is totally worth it when you have a manual trans IMO.
If you want to try a 4:1 in the transfercase, you should be able to accomplish it for much less than that. A kit would be $800 - $1200 new. But if you can find either a NP231 or a D300 that has one in it already, it would be cheaper. Most (or all as far as I know) D300's need to be run upside down, since they came in rigs with passenger side pumpkins. The NP231's are more straight forward.
While the planetaries CAN burn up in them if you go too fast, they are no death trap. You just need to be good about switching to high range when you get out in the open and want some speed. If you stay out of 4th and especially 5th gear in low range with a NP231 4:1, you should be fine. When we are both on the trail some time, you can ride in my rig and I can show you the difference between 2.72:1 and 4:1. It is totally worth it when you have a manual trans IMO.
Senior Member
Joined: Jan 2010
Posts: 855
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From: Taylorsville, UT
Year: 1999
Model: Cherokee
Engine: 4.0L
CF Veteran
Joined: Sep 2010
Posts: 1,930
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From: herriman
Year: 1991
Model: Cherokee
Engine: 4.0
If you do an Atlas...yes 
If you want to try a 4:1 in the transfercase, you should be able to accomplish it for much less than that. A kit would be $800 - $1200 new. But if you can find either a NP231 or a D300 that has one in it already, it would be cheaper. Most (or all as far as I know) D300's need to be run upside down, since they came in rigs with passenger side pumpkins. The NP231's are more straight forward.
While the planetaries CAN burn up in them if you go too fast, they are no death trap. You just need to be good about switching to high range when you get out in the open and want some speed. If you stay out of 4th and especially 5th gear in low range with a NP231 4:1, you should be fine. When we are both on the trail some time, you can ride in my rig and I can show you the difference between 2.72:1 and 4:1. It is totally worth it when you have a manual trans IMO.
If you want to try a 4:1 in the transfercase, you should be able to accomplish it for much less than that. A kit would be $800 - $1200 new. But if you can find either a NP231 or a D300 that has one in it already, it would be cheaper. Most (or all as far as I know) D300's need to be run upside down, since they came in rigs with passenger side pumpkins. The NP231's are more straight forward.
While the planetaries CAN burn up in them if you go too fast, they are no death trap. You just need to be good about switching to high range when you get out in the open and want some speed. If you stay out of 4th and especially 5th gear in low range with a NP231 4:1, you should be fine. When we are both on the trail some time, you can ride in my rig and I can show you the difference between 2.72:1 and 4:1. It is totally worth it when you have a manual trans IMO.
Senior Member
Joined: Jan 2010
Posts: 855
Likes: 0
From: Taylorsville, UT
Year: 1999
Model: Cherokee
Engine: 4.0L
So, anyone remember how I ordered an exhaust manifold kit on account of a leak in my junk? When it was too late to cancel, I found that it was just the coupling at the end of the manifold that had come very loose. I thought for sure the noise was higher up than that, but it wasn't. Oops!
If anyone needs one, I have a fresh 'un! It is OEM style.
If anyone needs one, I have a fresh 'un! It is OEM style.
CF Veteran
Joined: Jan 2009
Posts: 1,703
Likes: 0
From: Utardiland
Year: whats left of a 91
Model: Cherokee
Engine: one that makes noise
The 231 is not that weak... It's jsut not as strong as gear-gear. When you have 21-1(stock 231-231) going into the chain its a lot of TQ to load the chain with... not saying its a garrantied failur, just not as reassuring as gear-gear
Remember the first 231 does not have a chain, its just the planatary.
I will most likely end up with 231-231, 2.72 in front and 4-1 in back... only using 4-1 when I need to... 231 is a strong case for a factory case. btu with 35+ tires and 180+ crawl reduction things start to show the weak link. Last thing you want to fix on the trail is a T/case,motor,trans, LOL
Remember the first 231 does not have a chain, its just the planatary.
I will most likely end up with 231-231, 2.72 in front and 4-1 in back... only using 4-1 when I need to... 231 is a strong case for a factory case. btu with 35+ tires and 180+ crawl reduction things start to show the weak link. Last thing you want to fix on the trail is a T/case,motor,trans, LOL

and it's not the internals that really weak on the 231 it the case that's wrapped around them.
CF Veteran
Joined: Aug 2010
Posts: 1,326
Likes: 0
From: Huricane, Utah
Year: 1994 Ford Bronco
Model: Cherokee
Engine: 351 W
CF Veteran
Joined: Aug 2010
Posts: 1,326
Likes: 0
From: Huricane, Utah
Year: 1994 Ford Bronco
Model: Cherokee
Engine: 351 W
My .02 cent's on the whole doubler idea... If you can't afford a Atlas do the box for rock's with stock gear's front and rear. In my opinion if your gonna go the the 231 might as well throw a D300 behind it, Why because if you do a 231/231 your gonna have a great crawl ratio but still need to get a SYE to boot. with a 231/300 doubler you have a 231 crawlbox and a D300 win win!
yes I know you need to flip the D300 if ya have issues with that might as well wait for Atlas when you can afford it.
Oh yeah this forum makes my Bronco forum seem DEAD!
yes I know you need to flip the D300 if ya have issues with that might as well wait for Atlas when you can afford it.
Oh yeah this forum makes my Bronco forum seem DEAD!



