Usually you get oil drops on your rear window when an oil leak is present under the vehicle. The air currents whip the fluid around and if the leaks are bad enough, it's on your rear window. If none are present, then maybe you just drove
over something. Condensation on the cap usually indicates moisture in the crankcase. Could be an internal coolant leak, a weak or blocked pcv system or you might not drive long enough at one time to get the motor hot enough to purge the normal water vapors. Basically, keep an eye on your coolant level. If it starts to drop quickly and there are no external leaks, get it checked. It would also be a good idea to check the pcv valve or breather system that that particular motor has. Keep an eye on the oil level and condition also. One last thought, you're not getting oil out of the tailpipe or anything, are you? Might be one more thing to check. Hamy.
Thanks for your thoughtful reply. I just checked the inside of the tail pipe and it is bone dry, so I guess the oil is not coming from there. I'll take a closer look under the truck tonight, but the mechanic claims the underside is clean.
I'll keep an eye on the coolant level and oil appearance. Any other ideas would be greatly appreciated.
It wasn't quite a recall but they did replace my 98 ZJ's rear tranny case seal on factory recommendation at 55k - they said it was going bad on most of the 98's apparently. Maybe this will help you - or, maybe they just took my insurance company for a ride (-;
I had a leak in my rear differential on my 95 Grand Cherokee and there was a small ammount of oil on my rear hatch. I never thought anything of it in the year and a half I owned it and nothing went wrong.
My JGCL rear differential seal was wrong and leaking a little quantity of oil. The rear hatch door and window was oil sprayed. I replace the seal and all right again.
My JGCL is ZJ and have 31K miles.
No really I no go too fast , but I note that because the centrifugal force, the oil deposited in the cardan shaft, sprinkle all the truck floor. I suppose that part the oil no deposited in any site of the truck, fly afterward and by turbulence finally stop in the door and window. I Only guess. <img border="0" title="" alt="[Wink]" src="wink.gif" />