np231 J chain tensioner inquiry - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 03-27-2006, 12:13 PM   #1 (permalink)
 
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np231 J chain tensioner inquiry

does my np231 J have a drive chain tensioner to take up slack in the cahin as it stretches? or do i need to pony up the dough for a new chain?
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Old 03-27-2006, 12:17 PM   #2 (permalink)
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prob cheaper to just buy a new case........
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Old 03-27-2006, 08:50 PM   #3 (permalink)
 
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The 231 does not have a tensioner. If you chain is making noise, it is because your case has been run dry or the pump has gone bad. Replace them both anyway. The shift forks have a teflon style pad that protects them from the gears that they move. When cases are run low on fluid, they wear and won't shift properly, which also causes noise. A chain, pump, and shift forkwill cost about $400, not including labor. A used case is maybe cheaper, but you don't know what you are getting. The 231 case is very easy to rebuild. There are only a few parts in there. No nasty roller bearings to deal with. I suggest if you have some mechanical knowledge, take it apart, you can't hurt it!
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Old 03-28-2006, 03:00 PM   #4 (permalink)
 
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i am not aware of a tensioner. you should be able to tell if the chain is slipping by unbolting drivelines (or getting wheels off the ground) and cranking on the pinion nut at the t- case. mine slipped and clunked. a new chain is about $100 and not hard to install. if there is some kind of tensioner, i would love to see what you find out.
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Old 03-28-2006, 03:38 PM   #5 (permalink)
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Quote:
Originally Posted by dyne_ii
does my np231 J have a drive chain tensioner to take up slack in the cahin as it stretches? or do i need to pony up the dough for a new chain?
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Old 03-28-2006, 10:29 PM   #6 (permalink)
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This past sunday I just did my first SYE in my 1995 YJ with an NP231J there was no tensioner in mine, and I can tell you this, it was a lot easier than I thought, if you have some basic mechanical skill you can pull this off no problem.

If you can find an SYE install instruction on line, you will see how easy it will be to change out your chain as it is some of the first steps you need to take in order to complete the SYE.
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