So is your 87 E10 and 93 pure?

 

What would cause random increases and decreases in rpm's at highway speeds? I had a problem with my NSS because it wouldn't stay in overdrive. Replaced that and thats solved. Now my rpms will go up and down about 400 randomly when im over 50 mph.

1994 4.0 Auto 4x4

 

Well, come to find out it was a bad(new) remanufactured Alternator. Everytime I would try to start the Jeep with the bad one it would instantly blow the ASD fuse (Auto Shutdown). I put the second (rebuilt) but upgraded Alternator and it cranked right up. Thanks to the forum I was able to figure this one out

 

Good to hear it's taken care of. Don't let it scare you away from remanufactured, generally they are good. But with starters and alternators, if it doesn't work right when installed, suspect it.

 

Possible causes:

TPS (test it)
Fluid (check it)
Brake pedal switch (probably testable somehow...)
Torque converter lockup (much less likely)

Your Jeep is a WK (2005-2010), about three generations (XJ, ZJ, WJ, WK) removed from the vehicles we're discussing here (XJ 1984-2001). Try the Grand Cherokee area for people who knows these vehicles: https://www.cherokeeforum.com/f5/

 

Your Right On !!

 

Two part question:

I've been trying to figure out what my front axle is on my 2000. From a chart I found in the stickies here it seems to be a Dana 30. Does that seem right to you guys?

None of the parts stores around me have a gasket for it and I hate using just RTV. Also I don't like that synthetic oil can't be used with it. And how hard it is to break the seal when eventually you need to. Long story short, is cork okay for the front diff?

 

Yes u got a LP Dana 30

 

If you aren't in a hurry, check out Lube Locker gaskets. They're reusable.

 

Thanks fellas.

No hurry at all. I'll check it out.

Just trying to get a few things sewn up before my road trip to UT.

Edit: lube locker looks great. And easy to find. Much appreciated!

 

When you go to pull the cover, take out all the bolts except the two on top, crack em loose though. Then take a soft mallet and hit the cover from the side gently until it starts leaking, let it drain for a bit, hit it some more, etc.

 

Got it. Thank you

 

my 98 took about 1.5 hours to drop fix and re-install.

 

My guess is the torque converter is locking and unlocking.

salad posted some possibilities. Start by looking at the switch at the brake pedal. Another test that MIGHT work is to drive using your toes of your left foot to pull up on the brake pedal and see if the problem goes away.

 

Believe it or not mine did this and it was the fuel pressure regulator going bad.