# Unusual sound when decelerating

**URL:** <https://community.electricforum.com/t/unusual-sound-when-decelerating/16124>\
**Category:** GEM Forum\
**Created:** [May 22, 2019, 8:19pm UTC](https://community.electricforum.com/t/unusual-sound-when-decelerating/16124 "2019-05-22T20:19:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Bolanger](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/bolanger/32/4184_2.png) [@Bolanger](https://community.electricforum.com/u/Bolanger)\
**Post date:** [May 22, 2019, 8:19pm UTC](https://community.electricforum.com/t/unusual-sound-when-decelerating/16124/1 "2019-05-22T20:19:21Z")

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2005…7hp. When…and only when…I let up on the accelerator there is a low hum and minor vibration.  
Same at all speeds. This is not the ying…ying…sound. But a much lower but distinct sort of buzzing sound…and can feel very minor vibration in floor boards and steering wheel.  
Thanks all

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**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\
**Post date:** [May 23, 2019, 4:23pm UTC](https://community.electricforum.com/t/unusual-sound-when-decelerating/16124/2 "2019-05-23T16:23:25Z")

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Check input shaft splines for wear, also rubber bumper.

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**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\
**Post date:** [May 28, 2019, 5:12am UTC](https://community.electricforum.com/t/unusual-sound-when-decelerating/16124/3 "2019-05-28T05:12:56Z")

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Remove the motor. Where the motor slides into the Transmission (that’s the input shaft)  
That’s whats causing your problem. 99% sure of it. You might just wanna order a Imput shaft kit from Rodney. Get a whole new one with bearings and updated seals and a new rubber bumper for the inside of the motor

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**Author:** ![Bitman](https://avatars.discourse-cdn.com/v4/letter/b/e56c9b/32.png) [@Bitman](https://community.electricforum.com/u/Bitman)\
**Post date:** [December 18, 2019, 12:56am UTC](https://community.electricforum.com/t/unusual-sound-when-decelerating/16124/4 "2019-12-18T00:56:24Z")

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Replace the bumper. I just did it and it runs quiet.