NP231 Transmission Fluid : Final Answer
#1
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L
NP231 Transmission Fluid : Final Answer
I have read some of the threads on this and just ended up confused - I have a 98 XJ w the NPG 231 transfer case. Need to know the right type of fluid to put in there. Preferred brands and purchasing locations appreciated.
Thank you!
Thank you!
#2
Senior Member
Join Date: Jun 2009
Location: Blakeslee, PA
Posts: 750
Likes: 0
Received 3 Likes
on
1 Post
Year: 97
Model: Cherokee
Engine: 4.7
The final answer is: Depends who you talk to.
Most people will tell you Dexron fluid. And it works very well. Was the Mopar factory fill.
NVG's preferred/suggested fill is actuallly 5w-30. It falls in the same viscosity range as the Dexron (tho it feels a bit thicker when it is cold). But it has more anti-foaming additives. So it stays inside the case instead of potentially misting its way up the breather vent.
Synethic versions of either the tranny fluid or motor oil are excellent options.
Choice is yours, man.
Joe
Most people will tell you Dexron fluid. And it works very well. Was the Mopar factory fill.
NVG's preferred/suggested fill is actuallly 5w-30. It falls in the same viscosity range as the Dexron (tho it feels a bit thicker when it is cold). But it has more anti-foaming additives. So it stays inside the case instead of potentially misting its way up the breather vent.
Synethic versions of either the tranny fluid or motor oil are excellent options.
Choice is yours, man.
Joe
#4
CF Veteran
Join Date: Nov 2008
Location: Paso Robles Ca
Posts: 2,473
Likes: 0
Received 9 Likes
on
9 Posts
Year: 1991
Model: Cherokee
Engine: 4.0
The final answer is: Depends who you talk to.
Most people will tell you Dexron fluid. And it works very well. Was the Mopar factory fill.
NVG's preferred/suggested fill is actuallly 5w-30. It falls in the same viscosity range as the Dexron (tho it feels a bit thicker when it is cold). But it has more anti-foaming additives. So it stays inside the case instead of potentially misting its way up the breather vent.
Synethic versions of either the tranny fluid or motor oil are excellent options.
Choice is yours, man.
Joe
Most people will tell you Dexron fluid. And it works very well. Was the Mopar factory fill.
NVG's preferred/suggested fill is actuallly 5w-30. It falls in the same viscosity range as the Dexron (tho it feels a bit thicker when it is cold). But it has more anti-foaming additives. So it stays inside the case instead of potentially misting its way up the breather vent.
Synethic versions of either the tranny fluid or motor oil are excellent options.
Choice is yours, man.
Joe
and on the autos use automatic tran fluid to match the trany so if there were any transfer of fluid from the tc to the trans you would not have any negative effect
#5
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L
See this is where things get confusing - let's pretend you're talking to a baby guys. Seriously.
I have an auto 4.0. So combining the logic in the previous 2 posts - I don't want to use ATF in the trans and 5/30 in the tc because of risk of cross-contamination. So I should just go with the Dexron III.
It just gets worse when you actually are in the parts store. Some places don't even carry the stuff anymore - everywhere keeps telling me to get the ATF+4, which I don't want to start that discussion again - there are plenty of other threads on it.
#6
CF Veteran
Join Date: Nov 2008
Location: Paso Robles Ca
Posts: 2,473
Likes: 0
Received 9 Likes
on
9 Posts
Year: 1991
Model: Cherokee
Engine: 4.0
See this is where things get confusing - let's pretend you're talking to a baby guys. Seriously.
I have an auto 4.0. So combining the logic in the previous 2 posts - I don't want to use ATF in the trans and 5/30 in the tc because of risk of cross-contamination. So I should just go with the Dexron III.
It just gets worse when you actually are in the parts store. Some places don't even carry the stuff anymore - everywhere keeps telling me to get the ATF+4, which I don't want to start that discussion again - there are plenty of other threads on it.
Trending Topics
#9
Senior Member
Join Date: Jun 2009
Location: Blakeslee, PA
Posts: 750
Likes: 0
Received 3 Likes
on
1 Post
Year: 97
Model: Cherokee
Engine: 4.7
Mike ... you should be using SAE 30 or 40 if you want to match the viscosity of 90 weight oil. Not 5-30. That's assuming you don't want to use a synthetic gear oil (with GL3 or GL4 rating).
Google up a viscosity chart ... 5-30 is in the same index as the ATF. If it was good enough for NVG ... it's good enough for me.
Black ....If you have the risk of "cross contamination" then you should be changing your seals. What would you do if it was a manual tranny? Live in fear of cross contamination? You'd have to be leaking out of the tranny ... and then leaking INTO the t-case (or vice versa). There is a little bleeder hole at the bottom for that very reason.
The 231 case is not very particular what lube it receives. I've drained 90 weight out of some cases ... filled with the correct fluid ... and they're still on the road. Just make sure there is fluid in there ... and it'll probably keep on rolling.
Joe
#10
CF Veteran
Join Date: Nov 2008
Location: Paso Robles Ca
Posts: 2,473
Likes: 0
Received 9 Likes
on
9 Posts
Year: 1991
Model: Cherokee
Engine: 4.0
Mike ... you should be using SAE 30 or 40 if you want to match the viscosity of 90 weight oil. Not 5-30. That's assuming you don't want to use a synthetic gear oil (with GL3 or GL4 rating).
Google up a viscosity chart ... 5-30 is in the same index as the ATF. If it was good enough for NVG ... it's good enough for me.
Black ....If you have the risk of "cross contamination" then you should be changing your seals. What would you do if it was a manual tranny? Live in fear of cross contamination? You'd have to be leaking out of the tranny ... and then leaking INTO the t-case (or vice versa). There is a little bleeder hole at the bottom for that very reason.
The 231 case is not very particular what lube it receives. I've drained 90 weight out of some cases ... filled with the correct fluid ... and they're still on the road. Just make sure there is fluid in there ... and it'll probably keep on rolling.
Joe
Google up a viscosity chart ... 5-30 is in the same index as the ATF. If it was good enough for NVG ... it's good enough for me.
Black ....If you have the risk of "cross contamination" then you should be changing your seals. What would you do if it was a manual tranny? Live in fear of cross contamination? You'd have to be leaking out of the tranny ... and then leaking INTO the t-case (or vice versa). There is a little bleeder hole at the bottom for that very reason.
The 231 case is not very particular what lube it receives. I've drained 90 weight out of some cases ... filled with the correct fluid ... and they're still on the road. Just make sure there is fluid in there ... and it'll probably keep on rolling.
Joe
just
ATF to ATF
regular oil to regular oil
I'm not nitpicking the composition
one oil for both make your life easy
#11
CF Veteran
Join Date: Jan 2009
Location: Northfield MN
Posts: 1,242
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1995
Model: Grand Cherokee
Engine: 5.2 v8
See this is where things get confusing - let's pretend you're talking to a baby guys. Seriously.
I have an auto 4.0. So combining the logic in the previous 2 posts - I don't want to use ATF in the trans and 5/30 in the tc because of risk of cross-contamination. So I should just go with the Dexron III.
It just gets worse when you actually are in the parts store. Some places don't even carry the stuff anymore - everywhere keeps telling me to get the ATF+4, which I don't want to start that discussion again - there are plenty of other threads on it.
and i know my 99 calls for the dextron III and as far as in the parts places, just read the bottles, youll find the "new" version of the dextron I forget what its called but it will say for use in dextron III applications or something to that effect, just read read the bottles....thinking about it the other day at walmart there was a dextron VI or something and an atf fluid that was used in dextron applications, it wasnt a ATF+ though......like i said just read the bottles and youll find what youre looking for!!
#12
Member
Join Date: Aug 2009
Location: Littleton, CO
Posts: 114
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
x2 if that is what the factory put in that is what should be put back in, they did the research and know best. I have noticed that car quest makes a lot of fluids that many places don't carry anymore. Might want to check there
#13
Newbie
Join Date: Oct 2009
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1997
Model: Cherokee
Engine: 4.0L
Like many have said, as long as you keep the vicosity the same, the 231 is a beast and can take any type of fluid.
However, personally, I use the Dex merc ATF+ in mine as well as in my transmission. you can pick this up at any auto parts store.
However, personally, I use the Dex merc ATF+ in mine as well as in my transmission. you can pick this up at any auto parts store.
Thread
Thread Starter
Forum
Replies
Last Post
Psiegrist1
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
34
03-17-2022 02:15 PM
MidwestNick
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
02-28-2016 02:05 AM
Blackxj51
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
09-09-2015 04:25 PM
Vegas101
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
0
09-04-2015 11:52 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)