# Help identifying gear boxes **URL:** \ **Category:** GEM Forum\ **Created:** [June 26, 2024, 6:00pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012 "2024-06-26T18:00:04Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![ilov2xlr8](https://avatars.discourse-cdn.com/v4/letter/i/97f17d/32.png) [@ilov2xlr8](https://community.electricforum.com/u/ilov2xlr8)\ **Post date:** [June 26, 2024, 6:00pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/1 "2024-06-26T18:00:04Z")
Can anyone help me identify these two gear boxes based on the labels? What is their gear ratio? Thanks ![20240626_134707](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/3X/9/9/99def4605f2c0e709f60c397ccf17924af01a0f3.jpeg) ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [June 26, 2024, 6:13pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/2 "2024-06-26T18:13:24Z")
According to my note pad, the 012AS115 is a 10.35 gear set. If you need to confirm, Pull the speed sensor and count how many times the motor shaft goes round-round with one full revolution of tire. ---
**Author:** ![ilov2xlr8](https://avatars.discourse-cdn.com/v4/letter/i/97f17d/32.png) [@ilov2xlr8](https://community.electricforum.com/u/ilov2xlr8)\ **Post date:** [June 26, 2024, 6:36pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/3 "2024-06-26T18:36:58Z")
Google the numbers on the labels: 1824132 (012AS115-4) comes up as 10.35 3235416 (012AS115-1) comes up as 12.44 Both boxes are 012AS115 but one is -4 and one is -1 But would be nice if someone confirmed for sure. I’ll try your trick of measuring the revolutions. Thanks. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [June 26, 2024, 6:50pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/4 "2024-06-26T18:50:38Z")
I was not aware of the significance of the dash number. If you have both of those gearboxes in front of you this would be a good time to check. Reply back with what you find, and I could update my notes. ---
**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 27, 2024, 1:45am UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/5 "2024-06-27T01:45:31Z")
Upper right corner. One is 2B, the other is not 2B. ---
**Author:** ![ilov2xlr8](https://avatars.discourse-cdn.com/v4/letter/i/97f17d/32.png) [@ilov2xlr8](https://community.electricforum.com/u/ilov2xlr8)\ **Post date:** [June 27, 2024, 11:22pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/6 "2024-06-27T23:22:03Z")
So I turned the wheel while counting how many time gearbox input haft rotaded (no motor): about 5.25 revolutions per one wheel revolution. That doesn’t seem like a standard gear ratio. This is on the -4 box. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [June 28, 2024, 1:28am UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/7 "2024-06-28T01:28:14Z")
What is the state of this gearbox? On the workbench? In a car? and both wheels up in the air? The trick is that BOTH wheels need to turn one revolution. I’ve done this with a spare gearbox sitting on a bench, but die to the nature of the spider gears(differential) you need to keep track of what the other output shaft is doing if you are rotating via output. If on a workbench, it is better to turn the input shaft(counting as you go) and watch the output shafts for one full turn. ---
**Author:** ![ilov2xlr8](https://avatars.discourse-cdn.com/v4/letter/i/97f17d/32.png) [@ilov2xlr8](https://community.electricforum.com/u/ilov2xlr8)\ **Post date:** [June 28, 2024, 8:08pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/8 "2024-06-28T20:08:16Z")
OK so I was doing it wrong! Apperently you need turn both wheels lol. So I can confirm the following: Label Information: Schafer Driveline 10-29-2014 012AS115-4 1824132 2B Gear Rario: 10.35/1 Label Information: Schafer Driveline 11-12-2012 012AS115 1 3235416 2A Gear Ratio: 12.44/1 ---
**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:** [July 7, 2024, 12:24pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/9 "2024-07-07T12:24:13Z")
This is great info. Didn’t realize they made 2 different ratios from 2013-2015 Gems ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [July 7, 2024, 12:42pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/10 "2024-07-07T12:42:41Z")
Slowly peeling the onion. Thanks xlr8 - This info went into my notes. ---
**Author:** ![ilov2xlr8](https://avatars.discourse-cdn.com/v4/letter/i/97f17d/32.png) [@ilov2xlr8](https://community.electricforum.com/u/ilov2xlr8)\ **Post date:** [July 7, 2024, 2:01pm UTC](https://community.electricforum.com/t/help-identifying-gear-boxes/28012/11 "2024-07-07T14:01:47Z")
Yeah and each came with a different size motor. The 10.35 came with a larger, longer, 7hp motor by AMD, GU3-4002. 12.44 came with 5hp GE 5BC49JB6007. Makes sense since you’re losing torque with smaller ratio gear box.