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2018 RAM 2500 with 9000 miles with problems shifting after going from 33 to 37 in tire size now tranny doesn’t know when to shift I have a MM3 with some tunes in it so if anyone can lead me in the right direction.
I’d appreciate it and I hope I posted this in the right place.
IGOTACUMMINS thanked for this post
Who tuned it friend?
andto the forum @Sdskaggs74
Jim
2006 ~ 2500HD, Big Horn Edition, 5.9, 4x4, Q/Cab, 48RE, L/B, 3.73, S&B CAI & Snout, ProFlo 5" S/S exhaust, Smarty Touch, Oil ByPass Kit, 60 gal main tank, 110 gallon in-bed tank, XX-Fuel Filter System, Coolant Bypass Kit, Mag-Hytec front & rear end covers and trans pan, 285 x 70 x 17
"Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children’s children what it was once like in the United States, where men 'were' free." ~ Ronald Regan
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Fast Tommy’s also known as Diesel Race kits on eBay.
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Did you ask them what the issue is?
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I had the tuner installed before I put the bigger tires on and when I asked them how to fix it they said keep messing with the tire size and when I do change the size it gives me a service engine light it seems the truck doesn’t shift into 1st when coming to a stop and taking off especially if I’m on a incline it feels like it’s pulling out in 2nd or 3rd and I’m afraid it’s going to tear the truck up and thank you very much to you and everyone here for replying
watersupply189 liked this post
Did you have the MM3 and tuning prior to the new bigger tires.
You may need to see how much changes in the current tune you have is needed due to the bigger tires.
Did you adjust your tire/abs/speedometer to the new tires?
2017 WON TON CC LB 68AUTO
Secret stuff that make it vroom and whistle betterThuren 2.25 w/2.0 Fox Resi
Justin
Southern Oregon ( the Republican part)
UNITEDSTATES MARINE CORPS 1993-2007
No better friend, No better enemy.
Yes I changed the tire size a few times and no difference it just gives me a service engine light thank you for replying.
watersupply189 liked this post
When you say it doesn't know when to shift, what is it actually doing?
I did my MM3 when i was on 33s and then went to 37s later. I wouldn't say I had a problems shifting but it definitely shifted different because of the size of the tires. My truck didnt shift into 6th gear until i hit about 67mph. But like i said, i wouldnt call that a problem, it was still shifting around the same rpm points but at drastically different speeds cause of the tires. After I regeared to 4.10s everything went back to "normal" and shifted just like stock again.
Not sure if this helps your situation but for me, I couldn't take riding on 37s with stock gears for very long cause i hated the way it shifted.
2016 Ram 2500 Mega Cab - 68RFE - Carli 2.5" level coils - Carli radius arm drops - Carli 1" rear coils w/ RC 1" rear spacers - 17x8.5 0mm Method Mesh - 37x12.5r17 Toyo R/T - AAM 4.10 gears - Airlift 5000 bags - Airlift Wireless OBO - PacBrake Oil Filter Relocator
watersupply189 liked this post
It feels like the truck pulls out in 2nd or 3 every time you pull out especially on a incline.
Thank you.
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