Dd15 shifting issues. Dt12 won’t go into gear. Drive or reverse inop.524286/4 523/19 524286/17 525/7 

I hope all professionals would master their jobs and simplify it like you doing.

Helped allot, dealership told me it was the clutch and wanted to charge $6K, i changed this and boom, all worked perfect.

Hi JD. Sharing your wisdom is very honorable of yours. I think your are more than ready to go for your own shop. God will help you one that one. Thanks again. You have helped me keep my truck moving.

Great video. I have a D12 that the transmission is making an air chirping sound (best I can describe). Air pressure drops, and from time to time it will go into neutral when going slow and will not go back into drive until the air pressure is well above 100psi.

Very hard to get any information on the DT12. Appreciate the insight.

Hi J D i hope u remember me i am rudy from Black wolf i take my truck Iron do to Oil change and they fucked my truck over there for 3 days theyre stupid people they dont know anything and they called u so u can come and see my truck , u looked at my truck and u told me they fucked up the truck and i have to take it to the dealership, ur the only one that knew wats going on with my track and u fixed it the second day All i can say is ur an amazing guy and u know how to work with trucks , i hope u open ur own shop so i can be ur customer If u guys read my comment make sure u guys dont take ur truck to Iron cuz they dont know shit and they will fucked up ur truck Thank u again JD

Great video saved me a lot of money and time. Thanks

Hey , just saw your video! Great video and thanks for the insight… I have the DD 12 trans that shifts fine, except for does not go into manual mode. Any insight on this?

Awesome clips bro... I got spn 521488 fmi 5... could it be same part at fault....cause symptoms are pretty close.... especially when hot... Cools off and works fine for a bit... And HSA light come up.... Will appreciate your input....

Thank you so much. My truck is same ploblem.

Hi JD, I am having that trany ramping up while driving issue. I have not yet seen a video on that. Can you guide me in right direction. Appreciate it, thanks

Would you suggest this works with kenworth t680 Will go on drive but not reversing. Cleared code and then started working for a couple days and did the same thing ?

have been looking all over for information about the dt15 transmission. 2018 Freightliner, we are new to automatics, always having had manual transmissions. Is there a adjustment so the transmission does not go all the way down to 1st when you take off? With a manual you can take off in 3rd or 5th whatever is needed for the weight you are carrying.

Do the dt12 have a lot of issues ? Are manual transmission better for owner operators?

Finally someone who has information on this transmission. Any advice on the DT12, I've been looking at the Automatic Cascadia

Hi Mr JD I have a truck suddenly no sign on the hight way loosing power at all ，after stopping restart, neutral step on the gas engine RPM is normal, but after I shift to drive step on gas there is no any response, reverse gear, too, there is a burning smell under the truck didn't find where there is any abnormal, no engine light, no code, Coolant engine oil all full , 2016 year of Freightliner Cascadia DD15 engine automatic transmission ， do you have any idea what is going on with this truck？ please let me know thank you very much！！！

Hello. Same transmission. Have problems getting in gears after overnight stay. Like if I leave the truck off for a night it might go in drive but not in reverse from neutral. Putting it in drive and then straight to reverse seems fixing the problem. If I start driving like that it might miss some gears too. One time it just didn't want to go in any even gear. After playing with it for a while every morning - it's working fine for the rest of the day. Any idea what's could be wrong? Any help would be greatly appreciated.

I am having that transmission ramp up issue while driving. Can you plz guide me in right direction. Thanks

Hi, what about sa 160 Pos sensor shifting inhibited? Also with spn 523 fmi 19 Truck not wanting to shift and the actuator making extra sounds.

i have an emergency question if you can help please … I have 2016 Cascadia with dt12 automatic transmission and my shift controller on the transmission is damaged … does that make my truck not to start at all ????????????????????? the guy who checked my truck with the computer said so but I kind of have a doubt as it doesn't make sense unless if you confirm i also changed the cpc4 and reprogrammed it to my vin and still doesn't start the truck and that's the only error it's showing

I have same problem but doesn’t shows any code and checked 3 times by dealership and I also changed this shifter but same issue. What to do. Dealership also doesn’t have any answer because their test drive also doesn’t shows anything because it happens with loaded trailer sometimes after driven for couple hours.

I have tested my 2018 Cascadia 125 to the dealership and paid 3 times but they are unable to fix this gear issue. Which city are you from, I rely on you can fix the issue. Please help me.

I have 2017 Frightliner cascade automatic transmission. Early morning when I start to drive the Transmission turns from D to N . What could be the problem?

JD, lately when I start my 2016 Cascadia with the DT12 I get a low transmission air warning. Have you run into this problem before?

I have a 2004 and I'm getting dashes across the gear indicator. Not detecting neutral not cranking by the key .any advice? Thanks

Hey I have a automatic 2017 freight liner cascades it’s stuck in manual mode. It goes into reverse, neutral, and drive but In manual mode only. I replaced the switch already but no luck. I checked the cables and it’s getting ground and power. Any ideas or tips would be appreciated!

I just replaced shift control and still doesn’t work. I tried check transmission oil level and flushed. Works like a baby right now.

SPN 525 FMI 7...is that the same as well for shift stalk lever replacement

I have a 2017 Western star 5700 with the BT 12 transmission. When I start driving from a cold start, The transmission sometimes Mrs. below to mid gears and the even numbers. Then when I get to Highway speed the transmission attempts to reach 12 gear but only goes back to neutral and then back to 11. Also one thing I forgot is that when I am driving from a cold start, the transmission will stay in neutral and takes a while to get into the proper gear so that I can drive away. A dealership says that I need a transmission control module which you probably know is on a nationwide back order. What do you think?

I have a 2016 frightliner Cascadia that recently has done this, how do you diagnose if it's shift stock selector switch? Thanks.. 2nd party shop wants to rip the transmission out of the truck!

Do you think that gear selector switch would keep truck from starting and not change rpm when accelerating

Hi, good video but you need to show the video when the code was inactive after that job.

Hello my 2016 fright liner is some issue when I’m driving fast working fine , but in heavy traffic is changing in nature by it’s self and after 4 to 5 seconds is jumping to D please any help thank you !

Hey guys, I got this transmission problem and would like your opinion please. 2016 cascadia evolution where I stop at a red light and my transmission shifts to N on the dashboard but not on the shift selector. My fix to this is pull the air brakes, then shift the selector from D to N (matching the dashboard) then back to D. It takes off right after I release the air brakes. This happens randomly not at every stop. Any idea what it could be? Each time I hook a computer to it, returns no errors.

Thank you bro you really are amazing

I got freightliner cascadia automatic 2016 I got Solid ABS light going off and on and check engine as well and another thing is the gears only shifting manual not automatic i can drive shifting the gears manually and its not going over 55pm , do you have any idea what is going on

Greatly appreciated sir!!

What up bro,have you made any videos on same truck with dd13 with electric clutch actuator

Awesome….I thought it was the xy shifter…happened on my 2010 Pete and used to have to take a metal pole and bang the hell out of it

Have a question I have a 2016 freightliner cascadia automatic this problem only happens when winter comes and it's cold outside my semi will shift into neutral around 4th and 6th gear but sometimes at anytime then after awhile when she warms up i dont have the problem anymore until the next day of course any ideas thanks.

just to mention ... the cpc was changed as it was stolen from my truck and i bought 2 used ones ... one is not programmed and it does crank my truck but won't throttle or put gear on .. and the second one is the programmed to my vin and doesn't crank the truck at all

Can you describe exactly this parts name and where i can get it online, please?

so my question is on the automatic how long do they last how long will the clutch go out in it

Hi Where is your shop? I live in Phoenix AZ. Thx

Lot of background noise and want to listen it properly. I have same problem and went to Rapid City, SD Freightliner and they told me to remove the whole transmission to see what’s the problem and report doesn’t shows any code

Hi.JD. I got freightliner 2017 with DD15 about . Recently the gear should shift from 5 to 6/7, but it shift neutral for 1 sec and turns back to 7, also happened from 7 to 9. Sometime it happened all gears. Also When I split it shift neutral twice Or more then for E model. I got some videos if you like I can sent to ur email. Can you just give some advice about it? Much appreciate.

Another great video brother 👍🏼

I HAVE A 2017 CASCADIA DT 12 CODE 520999 FMI 7 indicates problem with clutch on display ,however clutch is fine/ thoughts ?

I got the spn 523 fmi 19. wont shift gear and Google pretty much says j1939 transmission current gear signal is erratic. Do you think this video will solve that?

New sub! Awesome video!

I couldn't read the paper work you had. But I think that I'm having the same problem spn 525 fmi 7 shift selector problem detection. Will you let me know please and thank you.

I just replaced a clutch on a cascadia 2017 the cluster only shows “manual” and it won’t start, it also says shift to neutral when the truck is already in neutral

Hello Mr JD,I have 2016 cascadia with Dt12 automatic and when shift to gears and driving it shifts itself to neutral and will not engage to gears .I have change the clutch but still the same issue .Took it to the dealership and they said this(UNIT WILL NEED THE HARNESS FROM CPC TO STALK SWITCH REPLACED).They said it’s nationwide back order.Please any help will be much appreciated.

Hey I have spn 521485. My truck is doing exactly what this one is doing it will not go in any gear and just beeps when I try to put it in gear. That's the only code. Will thus solve my problem?

Did you say you need g25 or z25 ?

Where you at man?? I need your help!!!!😭😭😭😭

I was having issues and I change the shift selector. Now it is back doing the same thing what should I have done?

have problem with my cascadia 2017 its not shifting stays on natural no check engine light after couple tries it shift and normal but when you stop and put in natural it does same thing any idea??

will a code reader for an automobile pick up these codes?

I have a freightliner cascadia with a dt12 engine that’s automatic when I hopped back in the truck it’s saying trans controller problem detected trans may not shift it’s stuck in neutral so I turned the truck off for 5 mins and it started to act normal any idea what it could be or the code please help

Same truck, when I let the truck sit for some days an try to start it up it'll say truck needs to be in neutral to start so I have to put air in the dryer then it will work but now it will not go in niether gear what you think the problem is

Hello sir i am having issue with the Dt12 transmission where is dosent go to gear and it show dashes instead and it beep when i make selection , so i hooked it up to the computer it show code 524286 and code 521485 gear rail split sensor - gear position Erratic , do i need to change the select switch arm or is it the spilt bin ? can you please advice me ? thanks

I have 2017 dd15 transmission freightliner cascadia wouldn’t shift gear at all dashboard says Gear pod.sensor problem Detected shift inhibited

I just bought a Cascadia with 600k miles that has the DT12 transmission in which the RPM will randomly go very high as if it misses catching the next gear. The clutch was recently replaced along with a flywheel resurfacing and another thing I noticed is that it is stuck in automatic mode and it won’t switch to manual mode when pressing the button. What could it be in regards to both issues JD? I’m subscribed to your channel and I like your videos

Thanks!

New sub great vid

Thanks for this, definitely nice however.. definitely didn't fix the issue on the one I'm dealing with figured try pick you brain since dt12 information in slim to none got a 15 Cas with a dd15 truck randomly won't go in to any gear just kicks back to natural does on either d or r. Only code that's is on the truck 520404 fmi 4 but its inactive even when its acting up.. checked the air tanks all dry, the regulatory on the Trans got replaced few months ago, the ippc won't load on the computer though it fails to connect. Tried new stalk switch and even a new msf since that's where the code was under. Only way to get it to act up is unplugging the pins going to the gateway out of the msf... any help would be appreciated at this point thanks for in information though Definitely watched a few and have helped thank you for your time

When I put mine in gear it shows N on the dash but you can hear it trying to find the gear. What could that be?

So I bought The Shift selector but my truck is still beeping and not going into gear it’s is -5 degrees here this is the first time it ever done this

I have a dd15 with dd12 transmission and the RPM keeps ramping while driving mostly in high gears please help

Hey bro I have a spn 521485 Transmission don’t go foware or reverse

Thank you!

JD i have 2016 frightliner i have problem only in morning DRIVE not work if i shift to back R work fine i heared air leak in transmission i try couple mintes or try MANULY THAN TRUCK MOIVE after that all day is good what u thinking about this ? thanks for help

What if the chassis throws abs fault and my truck won’t go into gear ?

Mine is stuck in reverse1 and won’t crank up now any suggestions

My dd12 is missing gears when shifting through gears and giving dashes for a second and trying again , is this my problem

I’m in a 2016 freightliner with 550k miles , when I shift to D and R it just blinks doesn’t go in gear :(

Having problem where mines won’t go into drive or reverse and failed relearn could this be a problem

I Have a code on my dash saying Gear Pos. Sensor Problem Detected Shifts Inhibited 2015 automatic Frieghtliner cascadia dt12 transmission Which it’s not allowing me to go into to gear once I go into gear it just Beep I had water in my air tanks I had to drain out It started to work but next day Same thing happened Fault code spn 521485 fmi 2 I bought the part in the video still same issue

Does this work for 2014 too

Great one

I don't have any codes. When I put it in drive or reverse it just doesn't move. I can rev the engine in neutral but in drive or reverse it does nothing. 2015 Volvo 670. Automatic

Sir I have a transmission dt12 not shift 2021 and truck won’t start

I change this shifting still not puting in the gear someone knows why?

Where is your shop located?

Bro where you located your shop please i need the address

Same truck code SA160. Truck will not go into gear

Hi I got a 2019 Cascadia it is jumping out from gear while I driving for a split second and goes back, this is result a big yank really hard on a truck, specially up hill! Any suggestions, ? Thanks Gary

Ours was the clutch

anyone experience spn 522 fmi 7 ?

fuck it. i will newer drive automatic junk...