I have had my Red Rock 4.7 2WD ever since new and outside of a few oil changes, she hasn't let me down. However, it is time to freshen her up a bit to make sure that she runs another 100k!
Some issues that I have been dealing with:
1) The transmission "bangs" really hard upshifting when I approach stop signs/lights. It has done this since about 60k and I have just lived with it. But now I can hear a "wrrrrrrrrr" noise also coming from under the car in combination with that and I feel I am on borrowed time.
2) The car has begun to run a bit "rough" at idle but with original plugs/wires, and everything else I can't seem to blame her. She has been an "on road" Commander nearly her entire life, and most of the 90K+ has been highway.
I have my tax return that hit yesterday, and I have some $$ I can allot to Commander repairs/upgrades. I am currently using Castrol GTX High Mileage with success, and would be open to some things to get done at this time. I can turn some wrenches on my own, but quite frankly my schedule doesn't allow me much time under the hood anymore, so "stealership" is likely where I will take her.
If you had it from new you have a lifetime powertrain warranty that came with the deal.
Let the dealer fix the trans.....for free.
As far as the plugs....tsk tsk.....you should be installing the fourth set of plugs by now.....supposed to be every 30k....I'm surprised it isn't throwing all kinds of misfire codes.
No plug wires to deal with on this engine so you're good there.
Time for coolant and drive belt......If you haven't been towing the rear end doesn't call for service but IMO you really should change the fluid for peice of mind.
Assuming you are replacing the air filter every now and again, no worries there.
As far a servicing the trans, it'll get its oil dumped at inspection and if there is any major component replacement they will reassemble it with new filters anyways......like I said, that all falls under powertrain warranty.
Good luck, keep us posted.