# How to tell the version of the differential

**URL:** https://community.electricforum.com/t/how-to-tell-the-version-of-the-differential/26580
**Category:** GEM Forum
**Created:** [June 21, 2023, 1:50am UTC](https://community.electricforum.com/t/how-to-tell-the-version-of-the-differential/26580 "2023-06-21T01:50:03Z")
**Posts on this page:** 1
**Showing post:** 2

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### 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: [June 21, 2023, 2:18am UTC](https://community.electricforum.com/t/how-to-tell-the-version-of-the-differential/26580/2 "2023-06-21T02:18:09Z")

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Nope. Cant be done. Send your differential to me, and I’ll send you back an iBrick.

Helps if you give some detail.

> [@Factory Controller Settings (Functions) for 7.5HP motor](https://community.electricforum.com/t/factory-controller-settings-functions-for-7-5hp-motor/26579/1):
>
> for a cart with 7.5HP motor by Advanced Motors like the ones found in 2015 GEM 4 seater?

That cart?

Iirc, 12.44 was stock on those.

Pull the fan shroud off the motor, jack the cart up, block one wheel, mark 12 o clock on the free wheel and the fan, start trurnubg the fan slowly by hand and count revolutions until the tire makes one full rev.

Then take the diff out and mail it to assyreqd Then I’ll still send you an iBrick

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