We have any auto transmission experts in the house?
I've got a 2002 V-6 AWD (U140F trans) Highlander with over 200K miles that's making an intermittent unhappy sound every now and again when starting from a dead stop. Once or twice per week? Hard to describe the sound.
How's this... Sounds similar to the noise of ABS kicking in, but this is with the foot off the brake pedal and over to the gas pedal.
99% of the time it's working perfect. Point is that there's no permanent damage (yet), but it's one of those sounds that makes me think that it'll end up with a slick of ATF soaked transmission parts out the back if I don't figure it out before the problem becomes clear.
I've got a bunch of manual transmission experience and it almost sounds like it's stuck in two gears at once until one of them lets go? Sounds like it's fighting itself inside? Is that even possible with an automatic?
Fluid level is fine and looks and smells normal. Doesn't seem to be temperature related. Doesn't seem to be steering wheel position dependent.
No codes stored, or pending and I put a professional Snap-On diagnostic reader on it and am able to review the transmission info. I didn't see anything there that caught my attention, but I don't really know what I'm looking at.
How sophisticated are the transmission diagnostics?
I've got a 2002 V-6 AWD (U140F trans) Highlander with over 200K miles that's making an intermittent unhappy sound every now and again when starting from a dead stop. Once or twice per week? Hard to describe the sound.
How's this... Sounds similar to the noise of ABS kicking in, but this is with the foot off the brake pedal and over to the gas pedal.
99% of the time it's working perfect. Point is that there's no permanent damage (yet), but it's one of those sounds that makes me think that it'll end up with a slick of ATF soaked transmission parts out the back if I don't figure it out before the problem becomes clear.
I've got a bunch of manual transmission experience and it almost sounds like it's stuck in two gears at once until one of them lets go? Sounds like it's fighting itself inside? Is that even possible with an automatic?
Fluid level is fine and looks and smells normal. Doesn't seem to be temperature related. Doesn't seem to be steering wheel position dependent.
No codes stored, or pending and I put a professional Snap-On diagnostic reader on it and am able to review the transmission info. I didn't see anything there that caught my attention, but I don't really know what I'm looking at.
How sophisticated are the transmission diagnostics?