Swanny81 New Member 1 Member For: 10y 20d Posted 02/02/15 09:05 AM Share Posted 02/02/15 09:05 AM Hi, sorry if this has been covered before, I am new to these forums and I wasnt sure what to search for, but I have just purchased a 2010 g6et with 70,000kms on the clock, from Brighton Ford. Unfortunately due to heavy traffic when test driving the car, I didnt get a chance to hit boost properly until I got the car home. Having never had a turbo with an auto behind it, I am just wondering if it is normal to feel a shunt (for lack of a better word) through the gearbox when hitting full boost then coming off the gas suddenly? The car obviously has a 3 month warranty from the dealer, so I am keen to get this sorted (if neccessary) within this period.Thanks for your help guys . Link to comment Share on other sites More sharing options...
***VX*R8*** Member 202 Member For: 11y 4m 7d Gender: Male Posted 03/02/15 01:09 AM Share Posted 03/02/15 01:09 AM Are you sure it's not a worn diff bush?Every fg turbo I've been in makes a thud when backing off quickly after accelerating hard... Link to comment Share on other sites More sharing options...
Wilko16 Donating Members 1,672 Member For: 17y 3m 1d Gender: Male Location: Melbourne Posted 03/02/15 01:23 AM Share Posted 03/02/15 01:23 AM Centre bearing worn can make the thud as well Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 29d Gender: Male Location: Probably above atmospheric pressure Posted 03/02/15 04:46 AM Share Posted 03/02/15 04:46 AM Yeah don't back off suddenly when you are right up it, there's theories that this can cause timing chains to jump teeth. Mine was jumped a tooth and I was letting it thump loads, though that doesn't establish causality because my car was diagnosed with it at 200,000km so normal wear of the timing chain system would also cause it. Link to comment Share on other sites More sharing options...
PTR_NITRO_FG Donating Members 3,214 Member For: 11y 8m 27d Gender: Male Location: NOR Perth Posted 03/02/15 06:37 AM Share Posted 03/02/15 06:37 AM ^^^ but how else do I hear my sh*tty passenger side dose Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 29d Gender: Male Location: Probably above atmospheric pressure Posted 03/02/15 12:00 PM Share Posted 03/02/15 12:00 PM Mine still flutters even if I let off more gradually, I was happy to find. Still find it hard to control myself though. Link to comment Share on other sites More sharing options...
"Captain Retard" Member 1,417 Member For: 10y 9m 20d Gender: Male Location: Shellharbour NSW Posted 04/02/15 03:46 AM Share Posted 04/02/15 03:46 AM (edited) I had this happen to me the other day in the wife's FG turbo.I had read about it before but never experienced it.I went to give it a bit in 2nd and some idiot changed lanes on me and I got off it real quick.It's like it's almost an emergency response from the engine when you back off real quick from full throttle.Maybe it's a built in safety response if the computer senses sudden deceleration.I don't know.......weird???It sure as hell doesn't do the driveline any favours when you snap the throttle shut suddenly, but it does pull the car up quickly. Edited 04/02/15 03:50 AM by "Captain Retard" Link to comment Share on other sites More sharing options...
xpl0sive Member 421 Member For: 16y 1m 1d Gender: Male Location: Melbourne Posted 04/02/15 04:19 AM Share Posted 04/02/15 04:19 AM My BF has always done this from day one. My tuner's advice at the time was, 'don't get off the throttle just before gear changes!', lol.When I had my car at centreline suspension a few years back, I told them about the backlash and asked them to check my diff bushes to see if they were busted. They were fine at the time, and he said the driveline backlash was fairly normal in these cars. Also mentioned it can be a worn tailshaft coupling/donut bush (big rubber donut between tailshaft and gearbox).I'm currently in the process of changing every single rear end bush to Superpro, and replacing the donut bush as well. I've learnt to just live with the backlash by now, but if it goes away after all this it'll be a bonus. Otherwise I'm not fussed, I've learnt to just live with it. I just make sure I don't back off the pedal right before gear changes. Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 11y 3m 2d Gender: Male Location: Brisbane Posted 04/02/15 04:23 AM Share Posted 04/02/15 04:23 AM Its a falcon...it will do it. To what degree depends on alot of things that has already been mentioned. Maybe somebody could take you for a ride in their car and show you(op) what "normal is" Link to comment Share on other sites More sharing options...
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