WT35002017

I have looked at many of the posts here to see if anyone has done what I have to alleviate these vibrations but I don’t think anyone has. Background: I used to race 1/8 mile asphalt supermods so I never liked the thought of torque restriction electronics or ABS or traction control. I had the vibration problems even when my 2017 Silverado 3500hd WT was new, especially it was felt while slowly shifting from 2nd to 3rd and then to 4th. Modulation of throttle in higher gears also caused vibration. I removed traction control and ABS fuses and the vibrations are no longer present. Smooth as glass all the way to 90. I have dash lights now but in the future may be able to take them away with HPtuners. The truck is a different animal with this easy mod as acceleration is not hindered and is now instant. I am convinced that there are programming issues related to the transmission and torque control. The transmission, 6L90, now shifts firmly also. Love my truck, love every vehicle I’ve ever owned. I mostly tow with my truck so I had to buy a towing brake system since the factory one is disabled when I disabled the ABS. Totally worth it, the trailer brake is better than what came with the truck by far. Good luck to all out there!

2017 Silverado 3500hd. Had PO741 code and shudder that would come up while trailering on the highway, first time at around 35k miles. I noticed it would happen when my trans 6L90 reached temps of 200 or more. It even got up to 225 at one point. It would shift erratically and I felt sure the high temp was causing something to not work well. I installed a bunch of trans coolers since I would mostly be using the truck for towing. The extra cooling made it so the temp would no longer exceed 185 degrees even in the hottest of days in souther Florida. The trans coolers stopped the code from happening again and no other problems were observed. When I did this I installed a valve that would easily allow me to drain tranny fluid later because I wanted to change the fluid at around 45k miles. This I did and dropped the pan to clean everything out. I used Amsoil. The pan was pretty clean and I changed the filter. No metal shavings luckily. To change the fluid I would drain by opening my installed valve and let it drain into a marked bucket 1 quart at a time, replacing old quart with a new quart into the trans dipstick tube. I realize it it not really a flush but a good percentage got changed out. I did a total of 4 gallons this way. My truck hasn’t had any issues so far reaching 65k.