I believe the BCM and ECm firmware is the same between the classic and new gen. My 2021 Classic 1500 didn't throw any ABS codes or issues after changing the tire size
Been wanting to upgrade from the 18" to 20" Laramie wheel on my 22 and was afraid it was going to be too expensive to calibrate the speedo. If i leave it alone it will be 3-5 mph off. But i see several complaining of losing fuel mileage. Making me rethink doing this at all
I don’t think gas was affected that much. Just my opinion. I really like my Falken Wildpeak AT3W ruclips.net/user/shortsgcwBVbFteE4?si=v8MWyeWYvgXyuZfN
Did you ever have any ABS issue? Just followed your video for a 2021 rebel and my Speedo is now perfect, and no code. Just want to make sure I’m not missing anything. Thx!
Just changed my tire size 2021 Rebel. Now my parking sensors won't turn on. I set tire size to the TRX factory size that's what I'm running. Spedo is prefect, parking sensors are not working.
I got a 2015 on 35s and my speedometer is corrected by one of the factory presets I used Harrison’s excel spreadsheet and it turns out my 35 is not a 35 when it’s rolling it turns into 32.97 making it a 33” tire and 2631mm is what I got using his spreadsheet so it happened to be a preset FCA had for my truck and I didn’t have to do the ABS configuration
I tried to give you two different links for Amazon but it keeps getting take down. The link he provided is incorrect. Additionally, I used the veepeak OBD II I bought for like 15 instead of the 120 OBD.
\ \We've had the same issue. Talked with my FTA and we got to n touch with engineering. The PAM is designed to work with tire sizes between 2430mm to 2557mm circumference. The 2023 models have this issue even with an MVP contract. I have been using AlfaOBD and setting max size to 2555mm and no DTCs. It's about 3mph off at 75 on 35s but we explain this to the customer and they have been ok with it. Engineering is supposedly working .. See more
the 2 black ports from the truck itself jump right at you when look under the dash correct? How are you getting the measurement in mm for your circumference as I have 35s but are measuring around 33.5in.
Also, re: tire size. Look online for circumference calculator. But, sizes will vary depending on time of year (temperature), and inflation. Best best is to get a GPS/speed app on your phone, and try to match the speed of the GPS app by adjusting circumference settings in ODB until closely aligned.
Also did you have any other issues ie park assist going out because I read in other forums where guys are saying they had trouble with that? Oh by the way great video!!
Thank you for the process on a 2022 I just did this on my truck and it worked perfectly. I have a 2022 limited with the 22" rims and the factory setting was dynamic tire Circumference 2503mm, When I loaded the new tire size I did get a warning for forward break mitigation not working as well as a check engine light. I disconnected alpha OBD, cycled the key and all the errors and check engine were gone.
@@acer154d I have mine set to 34" on my 2022 Limited with 35s. It's reading about 2mph slower than what it should at 70mph. I am bit nervous to increase the setting in case it knocks out parksense but I may give it a go. Do you know if Parksense is knocked out will it return if you put the setting back?
how did you correct the ft and rear park sensors so they work after 2022 1500 dt/ds models after setting the tire size it sets a code in PTS module, vehicle line mismatch b222a-00 and renders the front and rear park sensors unavailable
Afraid I don’t have that information. Check the spec for that tire online. I’d say roughly same as my Wildpeak, in this video. In the end, you’ll want to use a gps speedometer to adjust the mm so that it matches the vehicle speedometer. Same as I did.
That’s correct, they were no changes necessary for anything else. I suspect they have upgraded their computer in the newer model, and it doesn’t have all the dependencies as previous models.
I've read on numerous post to NOT change the gear ratio unless you have physically swapped out the gears. It can potentially put your gear in "limp" mode.
You cannot change your gear ratio with a computer. You would have to change your gear set in the front and rear differentials to do this. Then, say you went to 3.23 gear ration, you would then change that in alfaobd to 3.23 instead of 3.92
One last question did you leave it plugged in until you got the speedometer calibrated or did you disconnect then test it out and if not corrected come back and reconnect and try again?
You can leave it plugged in. It is simply a bypass, there are no interactions outside of connecting to the computer. You can leave it on for as long as you like, it has no implications driving or not
@@acer154d Well let me say I finally got speedometer calibrated after a few tries. Thanks for your great tutorial video which helped me tremendously and fairly easy to do.
Hi Aaron, I just installed the OBD linkmx + with the adapter. I managed to change the tire size to the exact speed as my GPS. the issue I have now is I've gone from 19 to 20 litres per 100km to now at 28 litres per 100 km. shouldn't my gas mileage be better? would really appreciate if you could help me with this.
If you put larger tires on that stock you're going to lose mpg's. Alfaobd and changing the tire size in the computer will not get you better fuel mileage
Afraid I’m not 100% sure. I believe it does, and has same pins, but it is located behind the speedometer/radio in dash. It appears to a lot more work to get to than the 1500.
Great video. Thanks for the link. I ordered off your link. Hope you get a few bucks
I believe the BCM and ECm firmware is the same between the classic and new gen. My 2021 Classic 1500 didn't throw any ABS codes or issues after changing the tire size
After you do all this setting modification, can you remove the bypass and obd2 dongle from the truck?
Yes, only necessary to program. Then remove.
Been wanting to upgrade from the 18" to 20" Laramie wheel on my 22 and was afraid it was going to be too expensive to calibrate the speedo. If i leave it alone it will be 3-5 mph off. But i see several complaining of losing fuel mileage. Making me rethink doing this at all
I don’t think gas was affected that much. Just my opinion. I really like my Falken Wildpeak AT3W ruclips.net/user/shortsgcwBVbFteE4?si=v8MWyeWYvgXyuZfN
Did you ever have any ABS issue? Just followed your video for a 2021 rebel and my Speedo is now perfect, and no code. Just want to make sure I’m not missing anything. Thx!
I’m no expert, but I didn’t have to do anything else. No abs adjustment
@@acer154d Thx! Thinking I will leave as is unless I get a check engine light!
Just changed my tire size 2021 Rebel. Now my parking sensors won't turn on. I set tire size to the TRX factory size that's what I'm running. Spedo is prefect, parking sensors are not working.
I got a 2015 on 35s and my speedometer is corrected by one of the factory presets I used Harrison’s excel spreadsheet and it turns out my 35 is not a 35 when it’s rolling it turns into 32.97 making it a 33” tire and 2631mm is what I got using his spreadsheet so it happened to be a preset FCA had for my truck and I didn’t have to do the ABS configuration
What preset was this?
I have General Grabber X3 35x12.5R18 and your MM set up got me close I might have to add 20mm more to be spot on
I bought th sgw plug off your Amazon link. It looks different from one in video. And I cant where to plug it in
Is that thr correect bypass cable in the link? Doesnt look the same.
is this it?
I tried to give you two different links for Amazon but it keeps getting take down. The link he provided is incorrect. Additionally, I used the veepeak OBD II I bought for like 15 instead of the 120 OBD.
\ \We've had the same issue.
Talked with my FTA and we got
to n touch with engineering. The
PAM is designed to work with tire
sizes between 2430mm to
2557mm circumference. The
2023 models have this issue
even with an MVP contract. I
have been using AlfaOBD and
setting max size to 2555mm and
no DTCs. It's about 3mph off at
75 on 35s but we explain this to
the customer and they have been
ok with it. Engineering is
supposedly working .. See more
the 2 black ports from the truck itself jump right at you when look under the dash correct? How are you getting the measurement in mm for your circumference as I have 35s but are measuring around 33.5in.
in the 2022 1500, you'll see them under the left side of the dash. There are plugs currently in the ports, and you swap out for the ODB adapter.
Also, re: tire size. Look online for circumference calculator. But, sizes will vary depending on time of year (temperature), and inflation. Best best is to get a GPS/speed app on your phone, and try to match the speed of the GPS app by adjusting circumference settings in ODB until closely aligned.
Also did you have any other issues ie park assist going out because I read in other forums where guys are saying they had trouble with that? Oh by the way great video!!
On the 2022 1500, I had no trouble with park assist. I believe that was issue in older vehicles, but 2022 firmware manages this better.
I think if you set it above 2715mm then it knocks out ParkSense. So just put the number lower and it should work.
Thank you for the process on a 2022 I just did this on my truck and it worked perfectly. I have a 2022 limited with the 22" rims and the factory setting was dynamic tire Circumference 2503mm, When I loaded the new tire size I did get a warning for forward break mitigation not working as well as a check engine light. I disconnected alpha OBD, cycled the key and all the errors and check engine were gone.
@@acer154d I have mine set to 34" on my 2022 Limited with 35s. It's reading about 2mph slower than what it should at 70mph. I am bit nervous to increase the setting in case it knocks out parksense but I may give it a go. Do you know if Parksense is knocked out will it return if you put the setting back?
@@landofnor I am no expert, but didn’t affect parksense at all
how did you correct the ft and rear park sensors so they work after 2022 1500 dt/ds models after setting the tire size it sets a code in PTS module, vehicle line mismatch b222a-00 and renders the front and rear park sensors unavailable
None of that occurred when I changed mine. Afraid I don't know. Maybe something went wrong. Check with dealer.
i am the dealer @@acer154d
@@ShopForeman-p7bjust did my tire size correction and I'm trying to figure out the same thing.
Great video. Can you verify the mm numbers for a Toyo Open Country AT3 tire size 33x12.50R22
Afraid I don’t have that information. Check the spec for that tire online. I’d say roughly same as my Wildpeak, in this video. In the end, you’ll want to use a gps speedometer to adjust the mm so that it matches the vehicle speedometer. Same as I did.
Thanks Aaron and will do.
I did hear you also say you did not have to adjust your ABS? It does it automatically is that what you found to be the case.
That’s correct, they were no changes necessary for anything else. I suspect they have upgraded their computer in the newer model, and it doesn’t have all the dependencies as previous models.
i have 3.92 gearing. any benefit to adjusting the ratio down if not towing etc? maybe fuel economy or something?
I've read on numerous post to NOT change the gear ratio unless you have physically swapped out the gears. It can potentially put your gear in "limp" mode.
You cannot change your gear ratio with a computer. You would have to change your gear set in the front and rear differentials to do this. Then, say you went to 3.23 gear ration, you would then change that in alfaobd to 3.23 instead of 3.92
One last question did you leave it plugged in until you got the speedometer calibrated or did you disconnect then test it out and if not corrected come back and reconnect and try again?
You can leave it plugged in. It is simply a bypass, there are no interactions outside of connecting to the computer. You can leave it on for as long as you like, it has no implications driving or not
@@acer154d Well let me say I finally got speedometer calibrated after a few tries. Thanks for your great tutorial video which helped me tremendously and fairly easy to do.
Hi Aaron, I just installed the OBD linkmx + with the adapter. I managed to change the tire size to the exact speed as my GPS. the issue I have now is I've gone from 19 to 20 litres per 100km to now at 28 litres per 100 km. shouldn't my gas mileage be better? would really appreciate if you could help me with this.
If you put larger tires on that stock you're going to lose mpg's. Alfaobd and changing the tire size in the computer will not get you better fuel mileage
do you leave the bypass plugged in? or do you take it off after making changes?
Not necessary, I've disconnected mine and plugged the cables back into the SGM.
Do you know if this bypass cable works on the 2022 Ram 2500?
Afraid I’m not 100% sure. I believe it does, and has same pins, but it is located behind the speedometer/radio in dash. It appears to a lot more work to get to than the 1500.
Anthony, checkout the Kaodtech Bypass Cable 19+ Ram 2500 real simple compared to going behind the dash.
Can you turn off the shitty MDS cylinder deactivation garbage? That would be amazing.
I can’t say for sure, but I’ve only seen manual ways to do that using +- shift buttons.