Ok so i have searched and not really found something that sounds the exact same. lately when i am driving my reg at least a couple times a trip it will all of a sudden make a huge thump, jerking the whole car then start driving again. The other day i was on the highway when i went to pass someone and the car seemed like it missed the gear or the drive train was not grabbing or something. It's a serious problem it jerks the entire car and feels like the transmission just fell through the floor. The dealer has perfomed the ECU upgrade and replaced the Diff on friday which seemed to work but last ngiht i was driving and it started to do it again. anyone experienced anyhing like this? thanks
huge thump/jerking touareg/ not good..need help
laith
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Ok so i have searched and not really found something that sounds the exact same. lately when i am driving my reg at least a couple times a trip it will all of a sudden make a huge thump, jerking the whole car then start driving again. The other day i was on the highway when i went to pass someone and the car seemed like it missed the gear or the drive train was not grabbing or something. It's a serious problem it jerks the entire car and feels like the transmission just fell through the floor. The dealer has perfomed the ECU upgrade and replaced the Diff on friday which seemed to work but last ngiht i was driving and it started to do it again. anyone experienced anyhing like this? thanks
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4,389 Posts
I wouldn't say common, but I have definitely seen people post about this, and have experienced it myself. If you do a scan with a VAG-COM or other VW scan tool, you will probably find and 'intermittent communication' event with the engine control unit or possibly other unit, causing the systems to momentarily go into safe mode. At the very least, it is a place to start looking.
thanks, you had this happen to you as well? was it a super hard jerk like floor felt like it was gonna fall out lol? thanks for the help my dealer here is useless when it comes to tregs as there are only about 8 in town at most if I were gessing
I've expereinced something very similar two times. My vehicle is a late '04 model v6. The first such jerk I noticed when deaccelerating from the highway. It felt like something went wrong with the center diff and it's really noticable. On both occasions there has been someone else in the car asking "What was that?" My uneducated guess is that it's the center diff and the car is trying to change the power distribution between front and rear, although not at all that succesfully.
stepper motor? really? i've already had one of those replaced but this seems nothing like the stepper motor problem i had before. The stepper motor was at low speeds while turning. This appears at high speeds, everyone in the car wonders what it is. Ya they said the scan came up with differential fault. hmm I really wanna get it fixed i'm sick of always being at the dealer
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5 Posts
transmission issue
I just had my T in for the same issue, possibly. I have a V10 TDI and it began sounding like a rock banged into the bottom of the car. When tracked closer, it would make this noise, possibly engine or trans, when the engine would lug down in 5th at 1100 rpm and around 42 mph. The trans would not shift down until it made a bang then dropped to 4th. The fright of it all is when it went through this delay and then jumped down a gear the rpms were up by 300 to 1,000 and in heavy traffic without notice this could be a problem. The rpm range was caused by the patience level or lack there of trying to get the car to do something right.
It was consistently demonstratable in this mode within a few days and could be generated in other gears and throttle movement on occasion.
The bottomline was that the transmission gear selector, a host of solenoids and switches inside the transmission had gone bad. The good news is the dealer can get at it from underneath without dropping the engine and all. This is a complete module replacement. There are no error codes generated when this happens. VW USA does not let the dealer do much more than module swap-outs. For us it was a warranty replacement.
John Freeman
I just had my T in for the same issue, possibly. I have a V10 TDI and it began sounding like a rock banged into the bottom of the car. When tracked closer, it would make this noise, possibly engine or trans, when the engine would lug down in 5th at 1100 rpm and around 42 mph. The trans would not shift down until it made a bang then dropped to 4th. The fright of it all is when it went through this delay and then jumped down a gear the rpms were up by 300 to 1,000 and in heavy traffic without notice this could be a problem. The rpm range was caused by the patience level or lack there of trying to get the car to do something right.
It was consistently demonstratable in this mode within a few days and could be generated in other gears and throttle movement on occasion.
The bottomline was that the transmission gear selector, a host of solenoids and switches inside the transmission had gone bad. The good news is the dealer can get at it from underneath without dropping the engine and all. This is a complete module replacement. There are no error codes generated when this happens. VW USA does not let the dealer do much more than module swap-outs. For us it was a warranty replacement.
John Freeman
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