short bursts of what feels like going over light rumble strips, and 3-4 "bumps" after shifting into Drive, going from 0 to 5mph.

89Suburban · Dec 4, 2023

NickTransmissions said:
That's not too far from where I grew up (Lansdale)...

If @blackelky is in the NY area, there's Garry Ferraro and CK Performance.

I think he is South Joisy.

NickTransmissions · Dec 4, 2023

89Suburban said:
I think he is South Joisy.

Well, where ever he's at, the main thing for him and others to keep in mind is avoiding places like Cottman and Aamco unless the individual seeking service is already aware of an overwhelmingly positive body of reviews or first hand experiences with a particular Cottman or Aamco location.

BlaineBug · Dec 4, 2023

2015-2016 models were prone to requiring torque converter replacement exactly for the shudder you are describing, or so I've heard. Some have reported improvements by changing fluid, others have not. Either way it's a good thing to do regularly as part of routine service regardless if you need to drop the transmission or not!

blackelky · Dec 4, 2023

NickTransmissions said:
That's not too far from where I grew up (Lansdale)...

If @blackelky is in the NY area, there's Garry Ferraro and CK Performance.

Sounds good tahoe is still under warranty until 130k so if the trans stays healthy after that I'll probably go to one of these people in new york if possible. Probably a 2-3 hour drive

HIgh Country Dude · 2025-02-27T21:08:05-0500

pedrinhokt said:
Came across this forum, and found excellent information, but wanted to post my details, wondering if anyone has a different opinion on my particulars. 2015 Tahoe, 142K.

I'm getting short bursts of what feels like going over light rumble strips, mostly between 60-70mph, at low RPMs, goes away with acceleration. Also, after shifting to Drive, especially if coming from Reverse, once I start moving forward, between 0 and 5mph, I get these 3-4 bumps, feels like missing a gear, or shift, and then it clears up, and it's fine. It's not every time, it's like 50/50 if this happens. Additionally, weird shifting in general, seems rougher, and mistimed, if it was a manual, it's like I'm accelerating while stepping on the clutch, RPM goes up, no power, quick, half a second later it shifts.

All sounds like transmission right? I would assume so, especially knowing the history of transmission issues on these guys, except it all started a day or two after my battery died and had to be replaced! Could be a timing thing that somehow got messed up because of the dead battery?

Anything can happen, 142K, and at two years ago at 100K I was told there was some metal in the transmission fluid and the dealer said a new transmission would be needed sooner rather than later, but 42K later and we're still here. Oddly timed, but maybe just a coincidence.

Checked brakes recently, and was also told that there a small leak in the differential, and tech cleaned and said said we change the seal on the next oil change, unsure if that could have gotten worse in 1000 miles.

If transmission, do you think a flush could breathe a more life into it, or likely too far gone?

Suggestions?

I've had the same exact thing since my 2022 high country tahoe was brand new. Today I was told by my local chevy dealer that I need a new transmission. I will try the instant shudder fix because I can't believe that my transmission has been failing for the last few years.

short bursts of what feels like going over light rumble strips, and 3-4 "bumps" after shifting into Drive, going from 0 to 5mph.

89Suburban

Bull in the china shop

NickTransmissions

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BlaineBug

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blackelky

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HIgh Country Dude

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