# Only Hitting 20MPH! **URL:** \ **Category:** Ford NEVs\ **Created:** [June 28, 2023, 11:04pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620 "2023-06-28T23:04:54Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [June 28, 2023, 11:04pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/1 "2023-06-28T23:04:54Z")
So I’m a bit confused and hoping someone out there can help me. I’ve got a D2 controller that I have reprogrammed with the following: value 7 (69) and value 20 (40). I have brand new D&D motor and yet I can only hit a top speed of 20MPH, measured by GPS and Speedo. What could be causing this problem? Prior to the reprogram and motor swap (original 4hp) I was only able to achieve 17MPH but the motor was overheating within 10-15 mins so I just assumed the motor was garbage and need a new one. ---
**Author:** ![David\_Illingworth](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/david_illingworth/32/2671_2.png) [@David\_Illingworth](https://community.electricforum.com/u/David_Illingworth)\ **Post date:** [June 29, 2023, 12:49pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/2 "2023-06-29T12:49:40Z")
Sounds like it might be in turf mode. What does it do when the key is in turf mode? Also check battery pack voltage at controller while driving 20 mph (2 big wires drivers side) ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [June 29, 2023, 2:53pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/3 "2023-06-29T14:53:31Z")
Turf mode tops out at 14/15 mph. I’ll check the voltage this weekend. I also noticed the right rear wheel is dragging significantly, difficult to turn by hand (when in the air). Could it just be a broken spring or warped drum? ---
**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 29, 2023, 6:00pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/4 "2023-06-29T18:00:37Z")
> I also noticed the right rear wheel is dragging significantly, This would have quite a bit to do with it. Check to make sure your park brake is releasing completely? ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [June 30, 2023, 6:36pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/5 "2023-06-30T18:36:09Z")
Checked again and the wheel drag I fixed, but still not getting over 20. Hooked up volt meter on the controller inputs while running at 20 and I can see 71.5v at 20. Battery voltage to start was 75.8. ---
**Author:** ![David\_Illingworth](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/david_illingworth/32/2671_2.png) [@David\_Illingworth](https://community.electricforum.com/u/David_Illingworth)\ **Post date:** [July 1, 2023, 12:43pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/6 "2023-07-01T12:43:28Z")
That will slow you down for sure. All the wheels should spin easily. The slides on the brake shoes and or the wheel cylinder are probably seized. ---
**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 1, 2023, 2:56pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/7 "2023-07-01T14:56:23Z")
The next thing I blame is your battery pack, But running your numbers I talked myself out of it. How are all the connections? When you ran your V check did youput your meter on the cables or the controller tabs? How are the cables going down to the motor? If resistance(bad connection/crimp) then it will feel hit after a high speed run. To go faster takes a bunch more amps. Assuming all batteries are perfectly balanced (running your numbers) 75.8 is 12.63 per battery at rest. That looks good. Under load 71.5 or 11.9v which isn’t bad for a load either. ![12v battery SOC%](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/6/648b348aa7812207ce56aa6e2d40302f4b00ab49.jpeg) Post a screen shot of ALL your controller numbers. Maybe I can spot something else that may be limiting your speed. Example: What is in- #4 - Max Arm Curr? #8 - Max Field Curr? ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [July 1, 2023, 5:20pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/8 "2023-07-01T17:20:49Z")
I’m connected at the tabs of the controller using alligator clips. Attached are the current configuration settings of the controller. ![IMG_6069](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/5/5bc7522102ca1219f51080be298d4b7135d6c1d1.jpeg) ![IMG_6068](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/8/8eba5b1ad40b4968e3ce40feacbbd42f702f4a63.jpeg) ![IMG_6070](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/5/5de18c67c64643511d28470afcca6c4284743f61.jpeg) Appreciate the help! ---
**Author:** ![David\_Illingworth](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/david_illingworth/32/2671_2.png) [@David\_Illingworth](https://community.electricforum.com/u/David_Illingworth)\ **Post date:** [July 1, 2023, 8:33pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/9 "2023-07-01T20:33:01Z")
Fix that wheel dragging. You should take all the brakes apart and free up the sliders on the brake shoes. If they’re not seized, I’ll be amazed. #1 factory setting is 18 #7 you can lower more since you have a D&D motor. You should be safe at 60 but this is not your problem. ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [July 1, 2023, 10:36pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/10 "2023-07-01T22:36:56Z")
Do you or anyone else know a direct replacement for the wheel cylinder other than Nev? ---
**Author:** ![David\_Illingworth](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/david_illingworth/32/2671_2.png) [@David\_Illingworth](https://community.electricforum.com/u/David_Illingworth)\ **Post date:** [July 2, 2023, 12:19pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/11 "2023-07-02T12:19:10Z")
Dorman W37347. Sometimes you have to do a little grinding. ---
**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:** [July 2, 2023, 6:43pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/12 "2023-07-02T18:43:30Z")
> [@David\_Illingworth](#): > > Dorman W37347. Sometimes you have to do a little grinding Been a while since I’ve had a set of GEM brakes apart, and can’t say for certain without measuring, but hat looks like it might fit some GEM rear drums also. ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [October 8, 2023, 3:21pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/13 "2023-10-08T15:21:43Z")
Hey David, I’ve fixed the wheel drag but still no increase in speed. The cart has serious torque but just top’s out at 18-22 mph depending on incline. ---
**Author:** ![David\_Illingworth](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/david_illingworth/32/2671_2.png) [@David\_Illingworth](https://community.electricforum.com/u/David_Illingworth)\ **Post date:** [October 9, 2023, 2:22pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/14 "2023-10-09T14:22:28Z")
Did you change setting #1 to 18? ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [October 9, 2023, 4:33pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/15 "2023-10-09T16:33:59Z")
CRAP I missed that one, I will change that in the next few days and post back. Thanks! ---
**Author:** ![C4202K2](https://avatars.discourse-cdn.com/v4/letter/c/49beb7/32.png) [@C4202K2](https://community.electricforum.com/u/C4202K2)\ **Post date:** [October 10, 2023, 10:02pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/16 "2023-10-10T22:02:36Z")
So, I updated value 1 from 68 to 18 and still topping out at 19-20 mph. ☹ ---
**Author:** ![Mrbig](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/mrbig/32/10046_2.png) [@Mrbig](https://community.electricforum.com/u/Mrbig)\ **Post date:** [October 26, 2023, 12:59pm UTC](https://community.electricforum.com/t/only-hitting-20mph/26620/17 "2023-10-26T12:59:28Z")
I checked my settings and 1 is set to 20, 3 is set to 15, 7 is set to 60, and 20 is set to 35. My Think goes 35, although I rarely go over 22mph.