Vibration on launch from full stop and turning

[JGindele]

Need some help trying to figure out what I am feeling in the cab in this scenario. I have a 2013 2500 SRW 3.42 gears 4x4. The first time I noticed this was on a 5 hour drive between Chicago and Cincy (I'm thinking the more things get heated up is when I notice it). I stopped at a rest area, got back in and after I backed up and pulled forward with the wheels turned right, I could feel a vibration...like the rear wheels slipping on wet pavement...empty btw, not towing. Took it into the shop and had them check it out during an oil change. Told them from a complete stop, when taking off and turning the wheel (either left or right turn) is when I would feel it. My initial thought was either something in the front end or the transmission. The said the diff fluid needed changed at 30,000 and that's probably what it was...the fluid was breaking down after long hauls. They also told me the 2013's don't have gears in the diff..some kind of new technology in there???? Sounded like BS to me, but I've never been inside there.

So I get it back from the dealership with new fluid and it seems to do it more regularly...empty and towing (light towing, around 5,000lbs)...and usually after getting good and warmed up. I know someone that said they experienced this when their u joint started going on them. I've also read some about launch shudder but I can't say that either one of those fits this exactly. The best way I can describe it is the feeling you get while turning in 4WD on dry pavement...but not that severe. Any help trying to diagnose this...or telling the dealer what to look at would be great.

 

[Newsa]

Limited slip? 6RFE? Or g56?

FYI, if you have transforce HT'S they slip easy on wet pavement. Especially if you are cornering and accelerating from a stop.

 

[Bug Out]

Can't remember where the post was, but apparently its some type of limited slip chatter/drivetrain angle ???? I put limited slip additive in mine and have not felt it since. That dont mean its fixed. This truck has been a real weiner of a truck so far... Going camping in a couple weeks. Should know 100% then if the same chatter is there.

 

[Steve Martin]

I had a similar problem with my 2013 2500 4X4. Not quite a vibration but a hard/clunk shift from reverse into drive. The first time I noticed it was when I pulled into a parking spot, went to back up to straighten out, backed up, went into drive and then a hard clunk when i went into drive. It was quite noticeable. Everyone sitting in the truck said, “what was that”. The dealer has had it for a week now and haven’t heard a peep. Luckily I took it in and didn’t shut it off and had the “transmission guy” look at it. It did it when he was standing outside the truck. Getting kinda worried it might be something serious. I have had all the flashes done, and only have 16,000 on the clock. Only does it when it’s hot and shifting from reverse or neutral into drive. When it’s cold or the truck has been sitting for 5-10 mins. after being hot it won’t do it. I can shut the truck off go into a store, come back out and it won’t do it. Drive the truck home getting it hot again and boom hard shift again from reverse or neutral into drive. Don’t understand?? Sag2, I know your in my area. Any thoughts or is it something you could look into?? If it is maybe we could chat?? Thanks everyone...Sorry...68RFE transmission

Steve

 

[JGindele]

Limited slip? 6RFE? Or g56?

FYI, if you have transforce HT'S they slip easy on wet pavement. Especially if you are cornering and accelerating from a stop.

68RFE...i think they listed it as anti-spin diff on my specs...I'm assuming that's limited slip. I also have the hard shift from reverse to drive. Sometimes it shifts very hard.

 

[sag2]

The anti spin in the rear uses helical gears, not clutches. What you are feeling is the wheels trying to slip on the pavement. I suspect that if you were on gravel or wet road you would not feel it. Limited slip additive is not supposed to be used, nor in theory should it make a difference. But some people have reported it does make a difference. It is fairly normal for the diff to do it, what it means is it is actually working.

 

[Bug Out]

Thanks sag2.