General maintenance
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by wcjr
Guys I'm sort of a newb when it comes to the XJ.
Just got the Jeep a few months ago and it now has 113k miles on it. I have never had to change out differential fluid.
I need to change out the differential fluid in the front and back.
I have the chrysler 8.25 in the rear and the dana 30 in the front (I think all XJ's have this axle in the front).
On the RTV, some people recommend blue, red, black, gray. Has anyone has any issues using one versus the other. I know that black is made specifially for differential use.
How many bottles do i need for the front, how many for the back? Will one tube of RTV get both axles? I guess that I am going to go with sythetic since most seem to recommend that If I can find it.
Just got the Jeep a few months ago and it now has 113k miles on it. I have never had to change out differential fluid.
I need to change out the differential fluid in the front and back.
I have the chrysler 8.25 in the rear and the dana 30 in the front (I think all XJ's have this axle in the front).
On the RTV, some people recommend blue, red, black, gray. Has anyone has any issues using one versus the other. I know that black is made specifially for differential use.
How many bottles do i need for the front, how many for the back? Will one tube of RTV get both axles? I guess that I am going to go with sythetic since most seem to recommend that If I can find it.
Junior Member
Joined: Jul 2011
Posts: 67
Likes: 1
Model: Cherokee
I loooove blue rtv permatex! I have used it for Intakes (v8) manual trannys thermostat housings difs and everything in between.. well things I don't want to come off easily... one tube should do you for both... I always live the look of blue rtv slightly oozed out. Reminds me of the good old days.. haha like 10 15 years ago assembling old school v8s with my pops
☠ CF Sheriff ☠
Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
The colors of Permatex RTV are for different purposes
Ultra Black is for oily/fluid applications
Red is high temp
Blue is sensor safe
Grey is rigid/high torque
I use ultra black for almost everything
Ultra Black is for oily/fluid applications
Red is high temp
Blue is sensor safe
Grey is rigid/high torque
I use ultra black for almost everything
Thread Starter
Seasoned Member
Joined: Jun 2010
Posts: 434
Likes: 2
Year: 1998
Model: Cherokee
Engine: 4.0L I6
yup i used versachem mega black for my diffs.
wcjr the diffs bolts are to be torqued to 30 ft/lbs both front and rear. The fill plug in the front diff is to be torqued to 25 ft/lbs. Im not sure if it matter what year your jeep is or not. those specs are for the 98 xj
wcjr the diffs bolts are to be torqued to 30 ft/lbs both front and rear. The fill plug in the front diff is to be torqued to 25 ft/lbs. Im not sure if it matter what year your jeep is or not. those specs are for the 98 xj
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by dukie564
The colors of Permatex RTV are for different purposes
Ultra Black is for oily/fluid applications
Red is high temp
Blue is sensor safe
Grey is rigid/high torque
I use ultra black for almost everything
Ultra Black is for oily/fluid applications
Red is high temp
Blue is sensor safe
Grey is rigid/high torque
I use ultra black for almost everything
Junior Member
Joined: Jul 2011
Posts: 67
Likes: 1
Model: Cherokee
☠ CF Sheriff ☠
Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
I need to change out the differential fluid in the front and back.
I have the chrysler 8.25 in the rear and the dana 30 in the front (I think all XJ's have this axle in the front).
How many bottles do i need for the front, how many for the back? Will one tube of RTV get both axles? I guess that I am going to go with sythetic since most seem to recommend that If I can find it.
I have the chrysler 8.25 in the rear and the dana 30 in the front (I think all XJ's have this axle in the front).
How many bottles do i need for the front, how many for the back? Will one tube of RTV get both axles? I guess that I am going to go with sythetic since most seem to recommend that If I can find it.
MODEL 30 (XJ)..............................1.48 L (3.13 pts.)
Rear Axle
8-1/4 (XJ) .........................................2.08 L (4.4 pts.*)
* When equipped with TRAC-LOK, include 2
ounces of Friction Modifier Additive.
Fluid Spec is 75W-90 GL-5 Gear Lube
Thread Starter
Seasoned Member
Joined: Jun 2010
Posts: 434
Likes: 2
Year: 1998
Model: Cherokee
Engine: 4.0L I6
hey guys im putting in a new injector cuz i got the check engine light and i scanned it and it says misfire in cylinder 2. The cylinder counts from the back of the engine correct if your standing in front of the car?
Also got a question is there any spec for how tight the throttle cable bracket should be tighten to?
I found that fuel rail is: Install and tighten fuel rail mounting bolts to 11 ±3 Nm (100 ±25 in. lbs.) torque so thats what 8.3 ft/lbs ?
Also got a question is there any spec for how tight the throttle cable bracket should be tighten to?
I found that fuel rail is: Install and tighten fuel rail mounting bolts to 11 ±3 Nm (100 ±25 in. lbs.) torque so thats what 8.3 ft/lbs ?
☠ CF Sheriff ☠
Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
cylinders are numbered starting at the front of the engine
snug tight basically. Don't bother with a torque wrench
snug tight basically. Don't bother with a torque wrench
Thread Starter
Seasoned Member
Joined: Jun 2010
Posts: 434
Likes: 2
Year: 1998
Model: Cherokee
Engine: 4.0L I6
hmm well im in process of replacing my injector, but i cant get the fuel line of the fuel rail i have the quick disconnect tool, i put it inside and try to pull the line off but i think its rusted which is why its not going so what should i do guys ?
CF ADMIN
Joined: Sep 2010
Posts: 34,088
Likes: 257
From: Lantana, Fl
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Do you have any PB blaster and a precision flathead screwdriver? If so spray some PB into the opening and let sit for a while. Then very carefully stick the precision into the opening and try to dig some of the crud out without damaging the lines.
Thread Starter
Seasoned Member
Joined: Jun 2010
Posts: 434
Likes: 2
Year: 1998
Model: Cherokee
Engine: 4.0L I6
well i manage to get the fuel line disconnected just took couple tries, now im trying to put the fuel rail back into the intake and i cant push in the fuel rail in idk why maybe its the new o rings or maybe im not pushing hard enough