Whats the problem?????

[mknack]

I was driving my XJ down the street the other day and I noticed something that is really bothering me. I was going about 15 miles per hour when I noticed that my jeep was constantly speeding up a little and then slowing down. The engine RPM was constant and I didint hear anything strange in the motor while it was doing it. The funny thing was when it slowed back down, there was a strange clicking sound every time from under the body/engine area.

Is this a sign that my trans is going or is there another problem that I dont know about? My XJ is heavily modified and has 93K miles. Any help would be great.

[KarlVP]

Sounds like it is time to replace the tranny filter.

[mknack]

You think the filter alone would cause something like that?

[MistWolf]

Does it do this at an idle? My XJ did this when it had a vacuum leak- in my case the bolts for the intake manifold had worked loose after installing the exhaust header

[mknack]

I didnt check it at idle, but I will now. I didnt check and see if the headers were cracked either, they are stock and I heard are prone to cracking.