HI....Hoping you have already changed your transmission fluid, but since I have done it myself many times over the years as a regular service, it is really not that difficult. I also have always changed my own engine oil every 5 K miles regularly as well, now having moved up to the $16 five-quart bottles of High-Mileage Full Synthetic 5W-20 Supertech Oil at WalMart. First, find some heavy-duty Rhino Ramps, as well as at least 5 or 6 quarts of much-Iess expensive but exact H/K OEM Idemitsu Genuine SPIII Transmission Fluid. I usually buy it it cheaply online by the case for around $6 a quart. Always warm up your engine to circulate all the transmission fluid before draining. Then remove all the 10 mm bolts from the hard plastic shield underneath the car first. The transmission drain plug for your ratchet will be 24 mm. Since you can't really access and service the inside filter (it is actually vertically-mounted straight- up deep inside) just simply remove the drain plug and then drain out what you can (a little over 4 quarts) into your drain pan, and replace the plug. Be sure to also buy the narrowest and longest funnel with a very small lower opening, and place it carefully right into the hole where your transmission dipstick goes, then very, very slowly refill with at least 4 quarts of bright red new SPIII fluid, watching closely for likely burbling and splashing. The old fluid will probably be a deep creamy disgusting brown color, and you might even want to change it once more again, after driving around for a few days, as only about half of the fluid is actually removed. Top off your fluid level only after checking when warmed up and in idle. You can also watch several YouTube videos online to view other methods of disconnecting and hooking up one of your outflow lines from the system to a messy bucket, just like changing out your power steering fluid, but be advised that if you use an expensive garage machine performing a complete full fluid replacement and/or back- flush, it can actually dislodge old worn transmission particles, which can then clog up critical narrow internal passageways. So I instead choose to do this simpler, easier, service regularly, at least every 25K miles, and my 2.4 engine still runs smoothly, and my transmission still shifts smoothly and has now lasted over 150K mi.