The UA80F 8 speed automatic transmissions is part of a new family of transmissions currently equipped on 2017 and after Highlanders and Siennas. With new things come new failures; this is no different. I hear there is a TSB going to be issued soon and of course I will update this description as soon as information becomes available to me.
In the meantime, from what I’ve gathered on the internet, the “fix” is REPLACING the TRANSMISSION! Yes, the entire thing! It is whining throughout several gears and ranges which leads me to suspect something to do with the final drive.
UPDATE:
As of April 2019, there is a new warranty enhancement for concerns that seem to match these vehicle symptoms of 2017 and 2018 Highlanders & Siennas. Check your dealer ONLY if you have a valid concern to identify potential eligibility. Reiterating though, Step 1 is to VERIFY the concern.
Негізгі бет Автокөліктер мен көлік құралдары 2017 Toyota Highlander UA80F Transmission Whining Noise Failure
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