I purchased a CPO 2007 Grand Cherokee Limited at the end of January. It currently has 20,950 miles on it.
1) I am looking at the manual and it says at 15K miles it needs a front/rear axel differential fluid change. I have no idea if the vehicle received that service or not since it was not in my possession. How important is this? the car is easily 5K miles over on this service. The car has never been off-road and has been driven fairly lightly (in stop and go traffic 50% of the time. the other 50% is free flowing suburb streets).
2) Should I just wait until the 30K mile service where they change the front/rear axel differential fluid AS WELL as the transfer case fluid and spark plugs?
3) How much did your 30K mile service cost on your Grand Cherokee?
4) I have a fluid evacuator (you know the thing that will suck up the fluid through the fill holes). Is it easy enough for me to do the front/rear differential with the evacuator?
6) what do you suggest I do with my dilema of being in limbo between the 15K front rear diff fluid change and the 30K mile service. I'm sort of in the middle but again I dont know if the previous owner did a 15K mile front/rear diff change (I dont think they did).
7) finally, the car is up to date on oil changes - I am running synthetic oil...does anyone see any problems with that necessarily? I've never owned a jeep/truck before and I'm used to putting synthetics in my sportier sedans/coupes.