# Noise in differential **URL:** https://community.electricforum.com/t/noise-in-differential/12414 **Category:** GEM Forum **Created:** [May 28, 2017, 4:53pm UTC](https://community.electricforum.com/t/noise-in-differential/12414 "2017-05-28T16:53:11Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![Naetdogg](https://avatars.discourse-cdn.com/v4/letter/n/cc9497/32.png) [@Naetdogg](https://community.electricforum.com/u/Naetdogg) #### Post date: [May 29, 2017, 12:09am UTC](https://community.electricforum.com/t/noise-in-differential/12414/2 "2017-05-29T00:09:31Z")
There was a post made about a guy who fixed that issue with Spline Shaft Repair: (Pictures no longer on host site) ☹ > [@Input Shaft Repair](https://community.electricforum.com/t/input-shaft-repair/6290): > > Moral of the story is do not ignore the deceleration vibration! Over the last year our GEM E2 has been experiencing a vibration after lifting off the throttle. It progressively got worse till one day we hit the gas and it didn’t move. I could hear the motor spinning and trying to push the GEM forward but the nothing. Research after the failure would point to failed motor to input shaft splines. This could have been prevented by dropping the motor, replacing the rubber bushing inside the fema… Or you can buy a new input shaft kit from Polaris but since your model is e580 (48v system w/ 2.6hp motor) I’m not sure if you differential gear ratio is 8.9:1 or 10.35:1. If its 8.9:1 they don’t have it. > [@Changing gear ratios](https://community.electricforum.com/t/changing-gear-ratios/2911/22): > > RATIO… TOOTH COUNT…1ST RED…2ND REDUCTION > 8.9 TO 1…27,53- 26,118…1.96…4.54 > 10.35 TO 1…27,53-,22,116…1.96…5.27 > 9.31 TO 1…27,53- 24,114,…1.96…4.75 > 12.44 TO 1…21,55-,24,114…2.62…4.75 > 11.89 TO 1…21,55- 26,118…2.62…4.54 10.35:1 Polaris PN: 2878944 Also replace the resilient bumper that’s inside the female end of the motor. Polaris PN: 5414407 Someone might know where you can buy this from a 3rd party source, I would like to know. --- _[View the full topic](https://community.electricforum.com/t/noise-in-differential/12414)._