So I am going to be putting an SYE in my transfer case and while it’s is open is there any good preventive maintenance I should do so I won’t have to reopen the case in the future?
Transfer case maintenance
- Thread starter Jackjack97
- Start date
L0jik
TJ Enthusiast
Not sure which kit you are getting, some of them include a few extra "wear and tear" items to install while its open (seals and such).
JB Conversions makes partial and master rebuild kits and they have a good reputation. Take a good look at the chain and see if its loose or if there is evidence of it rubbing on the inside of the case. A rebuild kit is ~$200 and a new chain is about $150.
JB Conversions makes partial and master rebuild kits and they have a good reputation. Take a good look at the chain and see if its loose or if there is evidence of it rubbing on the inside of the case. A rebuild kit is ~$200 and a new chain is about $150.
L0jik
TJ Enthusiast
Thats not Tera-Low
Tera-Low was a 4:1 conversion for the 231 that blew up the planetaries after 6 or 7 years. No longer made or supported. What you linked is a 2-Lo conversion that allows you to go into low range with the front driveshft still disconnected.
Sorry, I thought you were referring to the 4:1 kit that @L0jik mentioned. I dont know enough about the 2low kit.
I had mine apart originally for the sye install, and everything looked great. It is not a lot of moving parts to fail. The second time I opened it up was to replace the chain which in the end, there was absolutely nothing wrong with the one I took out.
As far as the wider chain kits available, I see no real benefit to them. I've never seen anyone posting that their chain snapped. To me, a wider chain is solving a problem that doesn't exist
Blasted newbies always get their terminology mixed up! Yea, the 2-lo is what I really meant!
I've read just enough about shifting problems with the 2 lo kit, in addition to the Tera low disaster, that I'll never put a teraflex product inside my transfer case.
When I did mine, I replaced the chain and the front output and input seals as well as the little oil filter and the o ring where the oil pump feed tube meets the oil pump.
When I did mine, I replaced the chain and the front output and input seals as well as the little oil filter and the o ring where the oil pump feed tube meets the oil pump.
That's too bad, as I'd really like to have one. What I'd really like is a twin stick, but that ain't happening...
Don’t know if you need it, but if you want peace of mind...
https://www.allstategear.com/NP231-...m_source=googlebase&utm_medium=shoppingengine
So is regearing a case even an option or are you just looking at swapping it out for lower 4 low gearing?
Remember the transfer is only really impacted when actually in 4wd. Most TJs have mostly highway miles on them. If you have worn chain or teeth when you open it up or have a current leak then I would do more than just the SYE. But if everything looks good (like most will) you should be fine. Even in 4wd most have been lightly used. If the TJ spent its life near Johnson Valley or similar area or you got it highly modded then it might be a different story.
To my knowledge, there is no option for putting a different low range ratio into a 231.
the teralow 4:1 kit was effectively regearing a case, but it also included the front half of the case housing, with a completely different planetary gearset that basically just reused the back half of the NP231. Having taken one apart they are quite different inside, with straight cut gears instead of the NP231's helical cut, and a planetary that one could describe as being 2-stage - the planet gears are two gears in one - a smaller diameter and a larger diameter, one interfaces with the input gear and the other with the annulus gear (vs a standard planetary with a single diameter planet gear that meshes with both input and annulus).
The planetary carrier looked like someone fabricated it up in their garage, so it's no surprise to me that they didn't last.
Sunder
TJ Enthusiast
When installing a SYE in my 97 a couple years ago, I replaced the chain as a preventative measure/peace of mind. It was easier to have in hand once the transfer case was opened than to open the transfer case and then realize I needed to order one - especially because I was paying a friend to do the install and needed the vehicle the next day, and it's the only vehicle I own.
Turns out that I didn't "need" to as the original chain was fine.
I still replaced it with no regrets, since I had a new chain (and returns/delivery is a time/money "issue" where I live), knowing it should be good for at least another 20+ years, lol.
Turns out that I didn't "need" to as the original chain was fine.
I still replaced it with no regrets, since I had a new chain (and returns/delivery is a time/money "issue" where I live), knowing it should be good for at least another 20+ years, lol.
Similar threads
