I have a 98 4x4 Chevy Blazer, w/ ~130K miles. I took it about a year ago to Cottmans Transmissions to get my tranny fluid/filter changed. I did this because I bought the SUV used, didn't know when it was last serviced and the fluid looked burnt. I was having some rough shifting problems.
Well a year later the hard shift from first to second is back. I've used ARX in my engine twice (love the product) and now I'm going to try it in my tranny. Thing is I have no experience in changing the transmission fluid/filter. I would really like to save myself some money and do it myself. How hard is it to do yourself and if you have any tutorials anywhere that could be of some help I'd appreciate it. Thanks!
If you are willing to do it yourself here's our recommendation. Install 6 oz's of Auto-RX and run 1000-1500 miles to clean the transmission.
THEN drop pan, change filter, reinstall. Measuring the old fluid in pan into a milk bottle type container, install that amount of new ATF back into transmission. Disconnect BOTH ATF cooler lines at radiator and place a container or pan under each line end (helps to have an assistant). Start engine, shut down after 1 or 2 quarts have come out one of the lines. Refill exact amount of fresh fluid in transmission (this keeps air out of the system).
Start engine again and repeat until clean fluid is coming out of cooler line. This is messy and time consuming but will purge all old ATF from transmission and torque converter. Reinstall cooler lines and start car, cycle through gears, place in park and check level per owners manual. Check for leaks. Top up as necessary after driving and heated up. Don't overfill.
