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My truck is an automatic. It's a 1999 with 125k. Not sure if it's an original tranny or what...
Sometimes it will bump from 1st gear into 2nd. Sometimes it's very smooth, sometimes a little bump, and sometimes it will shake the whole truck. Every other gear is smooth as can be... but every once in awhile it will be pretty bad.
Are there any fluids I can use to reduce this? Any information?
I change the filter and add the fluid to fill then go to the oil change place and have them flush the complete system. Cost for all is around $150. You can do it yourself for alot less, I just don't want to deal with draining the torque converter and the tranny cooler.