# Differential worn splines **URL:** \ **Category:** GEM Forum\ **Created:** [October 10, 2019, 4:55am UTC](https://community.electricforum.com/t/differential-worn-splines/17268 "2019-10-10T04:55:34Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![rwillia4](https://avatars.discourse-cdn.com/v4/letter/r/f0a364/32.png) [@rwillia4](https://community.electricforum.com/u/rwillia4)\ **Post date:** [October 10, 2019, 4:55am UTC](https://community.electricforum.com/t/differential-worn-splines/17268/1 "2019-10-10T04:55:34Z")
My E825 has 4500+ on the odometer and makes some noises. I though I had a bad bearing in the diff. When I took it out I think my issues is the splines being worn out. The symptoms are the grinding noise whenever not fully on or off the pedal. I replaced the rubber with the one from Polaris, not a long duration fix. Question is which side is softer the motor side or diff side? I’m thinking about a motor upgrade but think I will need to fix the diff at the same time. Do the newer diffs fix in the older E825? If so, I have a donor I can use. ![20190929_093056](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/a/abf520aed2aef6a5761b88ee39e4c25710552313.jpeg) ![20190929_093150](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/0/0f3294152db25ddd4a9f6d5356fc9620ee8b1905.jpeg) ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [October 10, 2019, 12:57pm UTC](https://community.electricforum.com/t/differential-worn-splines/17268/2 "2019-10-10T12:57:33Z")
That input shaft is really easy to replace and relatively inexpensive, you just pull the c-clip and the shaft will pull right out. The large bearing isn’t made anymore though, so you have to change things a bit. The bearing issue you are experiencing could be one of the bearings on that shaft. Get in touch with Rodney @Old_Houseboater. He usually has replacement differential input shaft kits with upgraded oil seals. Remember to use a new bumper. ---
**Author:** ![rwillia4](https://avatars.discourse-cdn.com/v4/letter/r/f0a364/32.png) [@rwillia4](https://community.electricforum.com/u/rwillia4)\ **Post date:** [November 8, 2019, 6:12pm UTC](https://community.electricforum.com/t/differential-worn-splines/17268/3 "2019-11-08T18:12:53Z")
I swapped out shaft with one purchased from Rodney. It was easy to put in. It got rid of a lot of the noice but I still have some other warn parts in there that are worki g good enough for now. If I turn the radio up I can’t hear it 🙂 ---
**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Post date:** [November 9, 2019, 12:52pm UTC](https://community.electricforum.com/t/differential-worn-splines/17268/4 "2019-11-09T12:52:40Z")
I put spline grease on mine and it seems to help . will defininently help with wearing .