Good evening everyone,
I apologize if this thread touches on a subject that has had previous discussion, but through extensive searching I have unfortunately not found any other threads about experiencing this specific issue. I have a 1999 Land Cruiser that has about 283,500 miles and an 4-speed automatic transmission, and has never given me any significant trouble previously. Just this evening, I was driving in the CO mountains at about 55-60 mph when I experienced a sudden whine in the car’s driveline-a “thump” was heard, followed by a loud whine from the transmission. The car suddenly de-accelerated, and the revs jumped as if I had downshifted.
After pulling over, I attempted to put the car into park, but intermittently the transmission would not engage at all-moving the gear selector would not have any effect. I was thankfully able to nurse the car home by locking the center differential, which allowed the transmission to engage and for me to shift into D and drive the ~2 miles home without experiencing the whine and slippage in the transmission. I already am assuming this is some significant failure in the transmission that caused such a sudden issue to appear, but am curious in all of y’all’s knowledge and experience if anyone has an idea of what this issue could be, and what caused it to appear so suddenly. I have driven the vehicle at low speeds around the underground parking garage and it seems to drive relatively normal, but I have not yet driven at normal road speeds since the initial issue appeared. I have no warning lights appearing on the dashboard, oddly enough.
I have included a video of the whine when the car is stationary, at the point where the transmission would not engage at all. -apologies for the poor quality of the video, as I was focused on finding a way to make it home. Thank you all very much for any help and advice.
I apologize if this thread touches on a subject that has had previous discussion, but through extensive searching I have unfortunately not found any other threads about experiencing this specific issue. I have a 1999 Land Cruiser that has about 283,500 miles and an 4-speed automatic transmission, and has never given me any significant trouble previously. Just this evening, I was driving in the CO mountains at about 55-60 mph when I experienced a sudden whine in the car’s driveline-a “thump” was heard, followed by a loud whine from the transmission. The car suddenly de-accelerated, and the revs jumped as if I had downshifted.
After pulling over, I attempted to put the car into park, but intermittently the transmission would not engage at all-moving the gear selector would not have any effect. I was thankfully able to nurse the car home by locking the center differential, which allowed the transmission to engage and for me to shift into D and drive the ~2 miles home without experiencing the whine and slippage in the transmission. I already am assuming this is some significant failure in the transmission that caused such a sudden issue to appear, but am curious in all of y’all’s knowledge and experience if anyone has an idea of what this issue could be, and what caused it to appear so suddenly. I have driven the vehicle at low speeds around the underground parking garage and it seems to drive relatively normal, but I have not yet driven at normal road speeds since the initial issue appeared. I have no warning lights appearing on the dashboard, oddly enough.
I have included a video of the whine when the car is stationary, at the point where the transmission would not engage at all. -apologies for the poor quality of the video, as I was focused on finding a way to make it home. Thank you all very much for any help and advice.