Tranny questions
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New User
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Tranny questions
Just did a full EGR delete, race pipe kit and SCT tune on my ‘17 6.7. I got on it pretty hard. Rear tires spinning and all of a sudden it acted like it went into neutral. I pulled into a parking lot and put it in reverse and it worked fine. Backed out and left again without hammering it and it seems fine? Did I hurt my tranny or what?
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New User
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Thanks for the input guys. I really appreciate the smart a$$ remarks from some of you. If you don’t have an opinion other than just looking for an opportunity to look like a smart *** then perhaps keep your opinion to yourself. I personally would like my truck to perform better and get better mileage and not use DEF. mustangs won’t pull my boats either lol
Fleet Mechanic
Joined: Jun 2018
Posts: 1,468
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From: Wasilla, AK
Just did a full EGR delete, race pipe kit and SCT tune on my ‘17 6.7. I got on it pretty hard. Rear tires spinning and all of a sudden it acted like it went into neutral. I pulled into a parking lot and put it in reverse and it worked fine. Backed out and left again without hammering it and it seems fine? Did I hurt my tranny or what?
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New User
Joined: Mar 2019
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I took it to the shop and there was an error in my downloaded program. Deleted the program and logged into WiFi and updated new program and it seems to have fixed the issue
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More Turbo
Joined: Oct 2017
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From: S. Indiana
Hmmmm...As I understand the 6.7L OE engine management systems, torque is managed / limited in the first three gears to protect the transmission from damage. Your delete and tune may have over ridden the OE torque management spec and may well have resulted in damage to the transmission. I guess you'll know sooner than later, and if there was damage it won't likely be covered under your warranty - if you're still under warranty. Good luck.
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Thanks for the input guys. I really appreciate the smart a$$ remarks from some of you. If you don’t have an opinion other than just looking for an opportunity to look like a smart *** then perhaps keep your opinion to yourself. I personally would like my truck to perform better and get better mileage and not use DEF. mustangs won’t pull my boats either lol
Freshman User
Joined: Sep 2012
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Why can't a truck be both? I'm sure people have been hotrodding trucks since the day the were created. Live a little.
Laughing Gas
Joined: Oct 2017
Posts: 787
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From: Lansing MI
Best case, the OP tripped something electronic and triggered a limp mode. Worst case, he has bits of metal floating around in either the transmission, or the rear diff. Nobody on a forum is going to know for certain, its all just speculation, only time will tell if the issue will reoccur.
Senior User
Joined: Nov 2015
Posts: 300
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From: Tampa
I deleted my 2012 and loved it. The truck can handle it. Don’t let the naysayers get to you.
I just had the transmission replaced in my 02 7.3 Excursion and 6 months later it would just drop out of gear at low speed. I get on it every time I drive it so I had the same thoughts you did. Turns out my PCM computer went bad.
The point is to enjoy your truck. I don’t really even tow much or use the bed but I enjoy driving it and I WANTED a CCLB with a diesel so I bought it- because I could.
I just had the transmission replaced in my 02 7.3 Excursion and 6 months later it would just drop out of gear at low speed. I get on it every time I drive it so I had the same thoughts you did. Turns out my PCM computer went bad.
The point is to enjoy your truck. I don’t really even tow much or use the bed but I enjoy driving it and I WANTED a CCLB with a diesel so I bought it- because I could.
Cargo Master
Joined: Dec 2003
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From: Saint Augustine, FL
Just did a full EGR delete, race pipe kit and SCT tune on my ‘17 6.7. I got on it pretty hard. Rear tires spinning and all of a sudden it acted like it went into neutral. I pulled into a parking lot and put it in reverse and it worked fine. Backed out and left again without hammering it and it seems fine? Did I hurt my tranny or what?
If the transmission programming is at fault and didn't apply the proper clutches then you might not have done any damage.
I owned a couple of Aamco transmission centers for several years so have considerable experience with automatics. Based on what I have seen some of the aftermarket tunes are causing transmission issues which result in ruined transmissions. I am 100% sure that a stock transmission can withstand virtually any amount of power a tuned motor can make, with the truck unloaded. Its rated for 1400 lbs/ft of torque.