1999 SW2 auto trans shift problems
Thread Starter
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Junior Member
Joined: Jul 2024
Posts: 13
1999 SW2 auto trans shift problems
Just joined so I don't know if I'm in the right area for this.
SW2, 240K, runs amazingly smooth, no check engine light, rev's up great in neutral, changed radiator now suddenly not accelerating properly or shifting correctly. Probably just a coincidence but I don't know. First checked to see if the radiator trans fluid cooling tubes were clogged, not clogged. changed the two (2) external sensors ( i think they are output and crank) no change. changed the fluid and filter, Nope. Found some info online but not much. One recommendation was to change the forward shift sensor inside the transmission, changed. still not fixed. If I take off slow and accelerate lightly it shifts ok but this is not acceptable for entering a hwy. Moderate gas, it will go but will not shift in third unless I lightly let off the gas. Too much gas and it falls flat on its face, Poor rpm and not shifting correctly at all. When I do get it up to third it will go to 4000 rpm and as soon as i just let off the gas a little it will shift. Once up to 55mph it goes fine but still no pep if I have to give it the gas. Any Ideas? Thanks, Mac
SW2, 240K, runs amazingly smooth, no check engine light, rev's up great in neutral, changed radiator now suddenly not accelerating properly or shifting correctly. Probably just a coincidence but I don't know. First checked to see if the radiator trans fluid cooling tubes were clogged, not clogged. changed the two (2) external sensors ( i think they are output and crank) no change. changed the fluid and filter, Nope. Found some info online but not much. One recommendation was to change the forward shift sensor inside the transmission, changed. still not fixed. If I take off slow and accelerate lightly it shifts ok but this is not acceptable for entering a hwy. Moderate gas, it will go but will not shift in third unless I lightly let off the gas. Too much gas and it falls flat on its face, Poor rpm and not shifting correctly at all. When I do get it up to third it will go to 4000 rpm and as soon as i just let off the gas a little it will shift. Once up to 55mph it goes fine but still no pep if I have to give it the gas. Any Ideas? Thanks, Mac
Thread Starter
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Junior Member
Joined: Jul 2024
Posts: 13
Yup, no clue what I'm doing
Yes, The car is just a beat around car and has no real value so I figured I'd have some fun and give it a shot. I only changed the one that is toward the front of the car. Any Ideas on what I might try next? As unscientific as it is, I did remove each one and put on a rubber hose and blew through them unenergized and each allowed air through. Then I energized each and they clicked and with only as much pressure that my lungs could muster they all appeared to close. Any help would be appreciated. Thanks
