Had the flush followed by a new TC and 4 miles later back in the shop waiting for factory comment to dealer. Meanwhile I am making monthly payments and driving a Malibu.

 

Range and TC Are just fine.Didn't purchase a C7 for Economy.

 

Just bought the Range also , can't believe the difference

Dave

 

I bought a range, just sent it in to update for the cost of shipping, can't beat that and I get to hear V8 at all times

 

I'd recommend getting a Range before issues show up. As I understand it, the shuddering feel is slippage in the TC that is beyond its design. The TC is supposed to slip some during V4 mode to reduce vibration, I think, and this is the source of the problem. Wonder what the M7 drivers feel since they don't have a TC. The patch kit for the problem is a triple flush with a less slippery fluid. But hasn't damage been done by this time? The fluid is a bandaid.

I believe Tadge said in an ask post that no functional changes have been made to the TC. The newer part numbers seen available are due to manufacturing changes rather than fixes for performance or reliability. If that's correct then your 2019 TC is functionally the same as my 2015 TC and is susceptible to the same problems. With that knowledge in mind I'd say get the Range before you need it.

My '15 A8 went about 25k miles before I noticed anything. I've had the triple douche and so far it feels OK. I've added a Range so I never use V4 mode. Time will tell.

We here on the forum are not a good example of the general ownership population in that we openly share our problems here. If I (and likely others here) wasn't reading how other owners are feeling a shudder in their cars and that it is a problem then I might not notice it in mine. Or maybe I'll figure its normal and not take it to the dealer. As it is we're all listening for warble in the rear and feeling for shudder in the TC. So our failure rate may be higher than the average owner not associated with a forum or club simply based on our awareness.

 

I would have the TC replaced and then use the Range module to prevent further issues. If I were looking at purchasing your car down the road, I would have a PPI done, test drive it, ask if you had had any issues with the TC and if they had been resolved. If you don't address the issue prior to offering it for sale, you risk having the potential buyer exposing an expensive known issue that may or may not be covered under the warrantee at that point. This could greatly affect the car's resale value or crash the deal. Another alternative is to not get it fixed now, use the Range module, and get it fixed prior to sale or before the warrantee runs out. Just some food for thought.

Todd

 

I remember reading somewhere that a highly trained GM Tech said the RPM wavering is common due to the very active TC. I believe he was speaking at a Corvette Bash a yr or so ago, can't remember for sure. Just saying not sure if this info was accurate or just GM jargon. I too am close to ordering a range device. I have noticed some RPM movement but no shudder and drive 95% in manual mode but that is a little aggravating in town. As U guys know it is hard to get the car into a situation where you don't see some RPM movement, several things can affect RPM, speed, hills, gear change, even cruise control. I am like some other guy posted, I am very aware of the slightest thing due to reading the forum posts daily, LOL. Just my thoughts.

 

Simple put my friend the Range won't fix your TC. But, if as you say it doesn't act up while in V8 mode the Range will keep it out of the V4 mode. And, the mpgs aren't affected that badly.

 

This exactly.

 

 

I just installed my new Range device yesterday... into my 2015 A8 with 7200 miles.

For me, the worry is over.

 

Does the range void warranty? How is it installed?

 

The Range Unit just plugs into the obd connector under the dash on the left side by the kick panel . It does not alter the tune in any way and only stops the AFM from kicking in but ... as always if there is any doubt about voiding a warranty you should unplug it before taking the car in for any work ......

Dave

 

...or... get an M7.

 

 

Our '15 Z51 with 4,000 mile experienced the RPM wavering. To tell if you have an issue, you can head to a nice flat section of interstate. When you get to a spot with no traffic in front of you, put it in Touring mode, and engage the cruise control (If you have a Range device installed, remove it first). Watch the tach. It should not move at all. If it wavers, then you have an issue (ours did). You do not have to wait long as it should be evident almost immediately. I took it to the dealership and had a triple flush done. I drove home on the same section of interstate and had no waver. Once I got home, I reinstalled the Range device and its been there ever since.

 

The range seems like the best, cheap (<$200) way to give A8 owners peace of mind. Have there been any cases where the TC failed while the owner was using range?

 

Dealer changed the TC under warranty and then I went with the Range. All is good.