# GEM Forum **URL:** https://community.electricforum.com/c/gem-forum/101.md?page=25 [Latest](https://community.electricforum.com/latest.md) · [Categories](https://community.electricforum.com/categories.md) · [Tags](https://community.electricforum.com/tags.md) **Page:** 26 --- ## [2005 Gem E4 error code 21](https://community.electricforum.com/t/2005-gem-e4-error-code-21/19317)
**Author:** [@eraney1](https://community.electricforum.com/u/eraney1)\ **Replies:** 60\ **Last updated:** [March 29, 2023, 1:39am UTC](https://community.electricforum.com/t/2005-gem-e4-error-code-21/19317 "2023-03-29T01:39:15Z")
I’m getting an error code 21 on my display. I have already switched out my controller and my accelerator pedal (both parts are brand new from the factory, not used ebay parts). I have not replaced the accelerator wire … --- ## [Solid alarm after rain and charging overnight](https://community.electricforum.com/t/solid-alarm-after-rain-and-charging-overnight/26081)
**Author:** [@gkupsch](https://community.electricforum.com/u/gkupsch)\ **Replies:** 7\ **Last updated:** [March 27, 2023, 6:41pm UTC](https://community.electricforum.com/t/solid-alarm-after-rain-and-charging-overnight/26081 "2023-03-27T18:41:36Z")
I was charging the car over night (Lithium batteries). The breaker switch was on over night. When I woke up, a solid alarm was sounding. I turned off the breaker. I noticed the black mat was not “in place” and it rai… --- ## [My new toy, thanks Ernie!](https://community.electricforum.com/t/my-new-toy-thanks-ernie/25724)
**Author:** [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Replies:** 40\ **Last updated:** [March 24, 2023, 9:57am UTC](https://community.electricforum.com/t/my-new-toy-thanks-ernie/25724 "2023-03-24T09:57:24Z")
--- ## [Differential Swap - Advice?](https://community.electricforum.com/t/differential-swap-advice/26086)
**Author:** [@Ahayes488](https://community.electricforum.com/u/Ahayes488)\ **Replies:** 9\ **Last updated:** [March 24, 2023, 5:18am UTC](https://community.electricforum.com/t/differential-swap-advice/26086 "2023-03-24T05:18:24Z")
Hi All, Looking to do a differential swap on my 2002 E825 4-seater. The diff went bad and makes a vibrating sound when decelerating. Fortunately I was able to buy a refurbished diff to trade out. Has anyone done this… --- ## [Anyone in San Diego and can work on Gems?](https://community.electricforum.com/t/anyone-in-san-diego-and-can-work-on-gems/26089)
**Author:** [@Ahayes488](https://community.electricforum.com/u/Ahayes488)\ **Replies:** 6\ **Last updated:** [March 23, 2023, 10:38am UTC](https://community.electricforum.com/t/anyone-in-san-diego-and-can-work-on-gems/26089 "2023-03-23T10:38:28Z")
I have a fleet of Gem’s here in Pacific Beach, San Diego and am looking for some mechanic help in exchange for $$$. Let me know, thanks! --- ## [TireWheel Question](https://community.electricforum.com/t/tirewheel-question/26078)
**Author:** [@TJC](https://community.electricforum.com/u/TJC)\ **Replies:** 6\ **Last updated:** [March 21, 2023, 9:26pm UTC](https://community.electricforum.com/t/tirewheel-question/26078 "2023-03-21T21:26:59Z")
I searched and found lots of post about tires and wheels. But Most I found reference going from 12 inch to 14 inch or more. My old GEM a 2000 825, has stock 205/50 10inch wheels. Can I do the 14 inch upgrade without m… --- ## [14 el XD having problems again](https://community.electricforum.com/t/14-el-xd-having-problems-again/24900)
**Author:** [@Mechmagcn](https://community.electricforum.com/u/Mechmagcn)\ **Replies:** 25\ **Last updated:** [March 20, 2023, 10:14pm UTC](https://community.electricforum.com/t/14-el-xd-having-problems-again/24900 "2023-03-20T22:14:53Z")
Well folks, it’s been a little over two years that the car has ran flawlessly. Last time it was a wet controller. A few weeks ago it started with some new symptoms, running down the road the speedometer will be reading c… --- ## [The "mini me" under dash battery for 2016+](https://community.electricforum.com/t/the-mini-me-under-dash-battery-for-2016/26076)
**Author:** [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Replies:** 10\ **Last updated:** [March 20, 2023, 1:52pm UTC](https://community.electricforum.com/t/the-mini-me-under-dash-battery-for-2016/26076 "2023-03-20T13:52:25Z")
My flooded Gem sat for 5 months before I could get to it’s rebuild. In that time the new lead under dash battery went dead. Well that is just unacceptable. No bms to protect my $30 lead battery, well we will fix that. P… --- ## [GEM purchase decision](https://community.electricforum.com/t/gem-purchase-decision/25966)
**Author:** [@dmaffei](https://community.electricforum.com/u/dmaffei)\ **Replies:** 31\ **Last updated:** [March 19, 2023, 5:32pm UTC](https://community.electricforum.com/t/gem-purchase-decision/25966 "2023-03-19T17:32:21Z")
So I have a 2013 E2 with the stake bed and the KingHappy/HappyKing/Li-onKing/LithiumGod 80v battery upgrade and 7,5hp motor, running on 3 years now. Anyway, wifey wants a 4 seater and as I said earlier, I was highly disa… --- ## [2018 Gem e6 reverse engineering ](https://community.electricforum.com/t/2018-gem-e6-reverse-engineering/26069)
**Author:** [@aj\_eich](https://community.electricforum.com/u/aj_eich)\ **Replies:** 8\ **Last updated:** [March 18, 2023, 10:00pm UTC](https://community.electricforum.com/t/2018-gem-e6-reverse-engineering/26069 "2023-03-18T22:00:49Z")
Hello all! I have been contacted by a friend that purchased 4 2018 e6 from what seems to be a surplus auction. These units were originally May Mobility units with 3 150ah Allcell batteries and two Zivan SG3 chargers. The… --- ## [“Help Request Form”](https://community.electricforum.com/t/help-request-form/26058)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 8\ **Last updated:** [March 16, 2023, 4:25pm UTC](https://community.electricforum.com/t/help-request-form/26058 "2023-03-16T16:25:49Z")
Hey I was wondering if we could create a “Help Request form” that new or even current members filled out that included all the important information that’s Alwasy left out. This is my Idea how it could work. #1 Someon… --- ## [Delay when changing directions](https://community.electricforum.com/t/delay-when-changing-directions/26055)
**Author:** [@JoMoGEM](https://community.electricforum.com/u/JoMoGEM)\ **Replies:** 17\ **Last updated:** [March 15, 2023, 2:25pm UTC](https://community.electricforum.com/t/delay-when-changing-directions/26055 "2023-03-15T14:25:54Z")
I have a 2002 e4 and it has started to build a delay when I change from forward to reverse or vice versa. After I swap the direction it takes about 30 seconds, during which time I have to hold the accelerator down, to ge… --- ## [Latest and greatest plug and play lithium options](https://community.electricforum.com/t/latest-and-greatest-plug-and-play-lithium-options/26005)
**Author:** [@Jsrrags](https://community.electricforum.com/u/Jsrrags)\ **Replies:** 12\ **Last updated:** [March 13, 2023, 5:52pm UTC](https://community.electricforum.com/t/latest-and-greatest-plug-and-play-lithium-options/26005 "2023-03-13T17:52:36Z")
Guys, I know this has been covered in older post. But looking again at my options for plug and play lithium battery options. Location St Louis, MO 2012 E4 Delta Q charger Currently running gel --- ## [Speedometer not working](https://community.electricforum.com/t/speedometer-not-working/3392)
**Author:** [@reo](https://community.electricforum.com/u/reo)\ **Replies:** 20\ **Last updated:** [March 12, 2023, 9:59pm UTC](https://community.electricforum.com/t/speedometer-not-working/3392 "2023-03-12T21:59:27Z")
Looking for any suggestions. The speedo and odometer don't work. The display is fine but no speed reading. In fact everything thing works great. I tried disconnecting and reconnecting the wires coming from the end of the… --- ## [2005 e4 turn signals not working](https://community.electricforum.com/t/2005-e4-turn-signals-not-working/26027)
**Author:** [@BuckeyenDE](https://community.electricforum.com/u/BuckeyenDE)\ **Replies:** 0\ **Last updated:** [March 8, 2023, 10:38pm UTC](https://community.electricforum.com/t/2005-e4-turn-signals-not-working/26027 "2023-03-08T22:38:39Z")
They were working last time I drove it, I have installed under bed lights which are not on the same circuit so that should not have messed them up. The schematic says they are on a 3A fuse, I do not see one on the fuse … --- ## [Generic replacement 12v accessory battery](https://community.electricforum.com/t/generic-replacement-12v-accessory-battery/25204)
**Author:** [@MrAir1](https://community.electricforum.com/u/MrAir1)\ **Replies:** 7\ **Last updated:** [March 4, 2023, 1:26am UTC](https://community.electricforum.com/t/generic-replacement-12v-accessory-battery/25204 "2023-03-04T01:26:38Z")
What is the generic battery that I can use to replace the Polaris 12v Battery - 4014770 ? This little battery is $130 if bought with the Polaris name on it. I know my friends here can tell me the battery replacement tha… --- ## [East coast Gem day](https://community.electricforum.com/t/east-coast-gem-day/25990)
**Author:** [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Replies:** 2\ **Last updated:** [March 3, 2023, 4:52pm UTC](https://community.electricforum.com/t/east-coast-gem-day/25990 "2023-03-03T16:52:44Z")
Gabriel came over to borrow a lithium battery and do some Gem … stuff. Lg and Gabe in the same garage working on Gems, what could it be? We finished a lithium battery build, brought my flooded Gem back to life and brain… --- ## [High Speed 9.3 Transmission coming soon](https://community.electricforum.com/t/high-speed-9-3-transmission-coming-soon/25909)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 145\ **Last updated:** [March 2, 2023, 3:01am UTC](https://community.electricforum.com/t/high-speed-9-3-transmission-coming-soon/25909 "2023-03-02T03:01:09Z")
The other day I decided I wanna try out the 9.3 Gears in my High Voltage Hotrod. Right now I have the 12:35 Transmission with 24.7 inch tall tires. I have the 8kw AC motor & a 24c Goliath Battery. Right now the car tops … --- ## [R4F Motor rebuild?](https://community.electricforum.com/t/r4f-motor-rebuild/25984)
**Author:** [@SDGem](https://community.electricforum.com/u/SDGem)\ **Replies:** 7\ **Last updated:** [March 2, 2023, 4:36am UTC](https://community.electricforum.com/t/r4f-motor-rebuild/25984 "2023-03-02T04:36:07Z")
Hi I’m new to the forum. I have a 2001 e825 4 seater that I recently replaced the R4F motor with a new R4F motor because the old one kicked it. I have no experience rebuilding motors so wanted to see if there is anyone h… --- ## [Front Sway bar 2016+](https://community.electricforum.com/t/front-sway-bar-2016/25850)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 22\ **Last updated:** [March 2, 2023, 4:34am UTC](https://community.electricforum.com/t/front-sway-bar-2016/25850 "2023-03-02T04:34:52Z")
Well the New Sway bar “kit” showed up and I’m Very pleased with it. I was happy to see that the bar itself is a “Schroeder” name brand with a part # on it so that I can get the weight specs on the bar itself. I thought i… --- ## [Attempting to hook up dash fans](https://community.electricforum.com/t/attempting-to-hook-up-dash-fans/25969)
**Author:** [@Bolanger](https://community.electricforum.com/u/Bolanger)\ **Replies:** 5\ **Last updated:** [February 28, 2023, 9:01pm UTC](https://community.electricforum.com/t/attempting-to-hook-up-dash-fans/25969 "2023-02-28T21:01:09Z")
Fans installed but need some help with the wire connection. I have several empty fuse spots….radio, heater, fan… So…if I want to use the radio one, for instance, install the fuse then find the wires that are associated… --- ## [Gem Car Parts (sub section)](https://community.electricforum.com/t/gem-car-parts-sub-section/25951)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 2\ **Last updated:** [February 28, 2023, 7:17pm UTC](https://community.electricforum.com/t/gem-car-parts-sub-section/25951 "2023-02-28T19:17:53Z")
Hey I was wondering (do we have) or is there a Gem car parts sub category here on the fourm? I’m pretty sure we have a classified’s section But what would it take to have a Gem car specific classified section? --- ## [Gem E4 2008 Headlights not working](https://community.electricforum.com/t/gem-e4-2008-headlights-not-working/25493)
**Author:** [@TimFitz](https://community.electricforum.com/u/TimFitz)\ **Replies:** 17\ **Last updated:** [February 28, 2023, 2:25am UTC](https://community.electricforum.com/t/gem-e4-2008-headlights-not-working/25493 "2023-02-28T02:25:24Z")
I have a 2008 GEM E4 that the headlights stopped working. I know it’s not the bulbs. I was driving home at night and hit a bump and they went out. I have replaced the top and bottom of the two relay’s on the firewall … --- ## [GEM E4 Batteries show charged but car slowly dies after 100 yard](https://community.electricforum.com/t/gem-e4-batteries-show-charged-but-car-slowly-dies-after-100-yard/14062)
**Author:** [@TimFitz](https://community.electricforum.com/u/TimFitz)\ **Replies:** 45\ **Last updated:** [February 26, 2023, 12:04am UTC](https://community.electricforum.com/t/gem-e4-batteries-show-charged-but-car-slowly-dies-after-100-yard/14062 "2023-02-26T00:04:41Z")
GEM 2008 E4 Batteries show fully charged on Dashboard and using a volt meter on each battery shows each on ~13V when tested. Batteries are about 2 years old. Symptom: It will start out and run up to only about 15 mph … --- ## [2016+ Car Covers](https://community.electricforum.com/t/2016-car-covers/25954)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 0\ **Last updated:** [February 25, 2023, 11:39pm UTC](https://community.electricforum.com/t/2016-car-covers/25954 "2023-02-25T23:39:16Z")
I have a like New e4 Classic Gem car cover. But it’s a tad small for my 2016. What covers are people using for the newer gems --- ## [Turtle time, what drives the yellow turtle light?](https://community.electricforum.com/t/turtle-time-what-drives-the-yellow-turtle-light/25914)
**Author:** [@GemDandy](https://community.electricforum.com/u/GemDandy)\ **Replies:** 3\ **Last updated:** [February 20, 2023, 2:35am UTC](https://community.electricforum.com/t/turtle-time-what-drives-the-yellow-turtle-light/25914 "2023-02-20T02:35:23Z")
What condition causes the turtle to light? “Batteries are shot, time to replace 'em” is obviously the common answer, but doesn’t explain how the light functions. Those wanting more info; 2012 E2 with 9 each 8vdc Gel cel… --- ## [Time to change the Rubber Transmission Mounts](https://community.electricforum.com/t/time-to-change-the-rubber-transmission-mounts/25867)
**Author:** [@grantwest](https://community.electricforum.com/u/grantwest)\ **Replies:** 19\ **Last updated:** [February 15, 2023, 10:09pm UTC](https://community.electricforum.com/t/time-to-change-the-rubber-transmission-mounts/25867 "2023-02-15T22:09:37Z")
Here is what my car did to the Rubber Transmission mounts. This is about 4 years of wear and Tear with the BIG AC motor I have steeped in about 1-1/2 ago and modified them and tryed tuning them up. But as expected th… --- ## [Smoke coming from D&D 7.5Hp engine in 2008 GEM](https://community.electricforum.com/t/smoke-coming-from-d-d-7-5hp-engine-in-2008-gem/25873)
**Author:** [@2008GEMe4](https://community.electricforum.com/u/2008GEMe4)\ **Replies:** 9\ **Last updated:** [February 15, 2023, 4:24pm UTC](https://community.electricforum.com/t/smoke-coming-from-d-d-7-5hp-engine-in-2008-gem/25873 "2023-02-15T16:24:03Z")
I just changed the engine seal and the speed magnet sensor in my 2008 GEM with D&D 7.5HP engine. I also have a more powerful battery set up. I was going about 25 for 4 miles and then engine/transmission started smoking… --- ## [Powder Coating is cheaper than you think](https://community.electricforum.com/t/powder-coating-is-cheaper-than-you-think/25848)
**Author:** [@js9354](https://community.electricforum.com/u/js9354)\ **Replies:** 11\ **Last updated:** [February 12, 2023, 12:13am UTC](https://community.electricforum.com/t/powder-coating-is-cheaper-than-you-think/25848 "2023-02-12T00:13:06Z")
I am restoring two 2022 Gem Carts that were hit by Hurricane Ian in Naples. Both were in Coastal Homes. Anyway salt water does damage quickly. Fortunately, most of the frame is aluminum. But the front frame, bumpers and … --- ## [2015 error code](https://community.electricforum.com/t/2015-error-code/25860)
**Author:** [@mreiff](https://community.electricforum.com/u/mreiff)\ **Replies:** 3\ **Last updated:** [February 11, 2023, 8:21pm UTC](https://community.electricforum.com/t/2015-error-code/25860 "2023-02-11T20:21:29Z")
I know there probably is a topic somewhere on this forum about this, but I cant find it. A, E2582.7 code is displayed on the dash and the turtle light stays on. does anybody know what this means? Thanks [Previous page](https://community.electricforum.com/c/gem-forum/101.md?page=24) [Next page](https://community.electricforum.com/c/gem-forum/101.md?page=26)