when I tried to speed it up the gear goes up and down?

1998 TOYOTA SIENNA
109,870 MILES • V6 • FWD • AUTOMATIC
Avatar
AMANDADA
  • MEMBER
  • 1 POST
When ascending hill it slows down and when I tried to speed it up the gear goes up and down again and again. As if the gear wants to engage a higher gear it drops back to the lower gear and it repeats cycle. Please I need your help. Thanks
Jan 24, 2015 at 3:51 AM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
scan for codes but I don't think much is wrong with it. hills will do that . it may also be age of car.
Jan 24, 2015 at 6:00 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,872 POSTS
Hmm, I have seen the input shaft speed sensor get weak and cause this issue or the catalytic converter is partially clogged up, this guide can help with testing the cat and I have included the input shaft speed sensor location in case you want to swap it out.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

They call it a #2 shaft speed sensor. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.




.
Image (Click to enlarge)
Attached Media
Sep 19, 2024 at 3:36 PM
Advertisement