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Old 21-12-2011, 05:00 PM   #1
shayne93
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Default AU2 Sedan auto shifts hard from first to second

Im looking at buying an AU2 Sedan, 6 Cyl with 183000 on the clock.
It shifts hard from first to second.
Would a transmission oil and filter change fix this problem or is it a worn out box?

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Old 21-12-2011, 05:10 PM   #2
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Default Re: AU2 Sedan auto shifts hard from first to second

does it have a shift kit?
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Old 21-12-2011, 05:26 PM   #3
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Default Re: AU2 Sedan auto shifts hard from first to second

ECU / trans retrain may fix that. Mine shifted hard but improved significantly once I did a retrain.

May also be due to the way I drive, I don't just shove the pedal to 60% and keep it there, I press it a bit to get going, then after a moment press it harder. In economy mode the first shift happens way too soon, sometimes in the middle of pressing harder. Lurch lurch
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Old 21-12-2011, 05:28 PM   #4
shayne93
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Default Re: AU2 Sedan auto shifts hard from first to second

no shift kit.
This was grandma driving though a backstreet in suburbia shifting hard from first to second, 2ns to 3rd was alright. didnt get to 4th
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Old 21-12-2011, 05:47 PM   #5
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Default Re: AU2 Sedan auto shifts hard from first to second

my money is on a faulty solenoid - S5 perhaps if i remember correctly?
but definitely get the car serviced
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Old 21-12-2011, 05:53 PM   #6
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Default Re: AU2 Sedan auto shifts hard from first to second

Family EL XR8 with 160,000 kays was doing similiar and and a service fixed it for while but then it went again banging hard into 2nd and box had to be rebuilt. And the car is not driven hard
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Old 21-12-2011, 09:45 PM   #7
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Default Re: AU2 Sedan auto shifts hard from first to second

Agree with Mr Hardware. does it do it cold? or after about 10 minutes driving.
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Old 21-12-2011, 10:08 PM   #8
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Default Re: AU2 Sedan auto shifts hard from first to second

Wouldnt hurt doing a service and retrain to begin with...
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Old 21-12-2011, 10:25 PM   #9
shayne93
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Default Re: AU2 Sedan auto shifts hard from first to second

I don't know if it does it when warn as I only tok it for a quick drive.
It's still a bargain anyway
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Old 21-12-2011, 10:31 PM   #10
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Default Re: AU2 Sedan auto shifts hard from first to second

There's a recent thread (search for S5 Solenoid) .... there's a listing there on what all the solenoids do ... S5 regulates shift firmness.
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Old 22-12-2011, 11:02 PM   #11
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Default Re: AU2 Sedan auto shifts hard from first to second

I think i was too hard on the car, as in looking for things to fault. when I went and picked it up, it was cold as a stone and was fine. I drove it home (50-60) ks and was a good drive.
Apart from the paintwork, best buy at 400 bux!!!
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Old 25-12-2011, 01:10 PM   #12
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Default Re: AU2 Sedan auto shifts hard from first to second

My xr8 will shift hard into second sometimes. If i leave standstill with light throttle application and then have to lift a little before the 2nd gear shift it will thump, hopefully a service may improve it but my gut says it may be more substantial.
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Old 04-01-2012, 11:43 AM   #13
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Default Re: AU2 Sedan auto shifts hard from first to second

I had the same issue just bought a AUII Fairmont Wagon and the auto hadnt been serviced in along time oil was black. A filter and oil change fixed it.
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Old 04-01-2012, 11:47 AM   #14
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Default Re: AU2 Sedan auto shifts hard from first to second

my money is on s5 also

does it flare from second to third and occasionally slam 4th?

my EL's s5 went recently after a transmission service, and is still faulty as we speak. Makes for a sporty drive!
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Old 07-01-2012, 08:39 AM   #15
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Default Re: AU2 Sedan auto shifts hard from first to second

S5 is for shift pressure of EVERY gear.

S4 is the band pressure switcher, it switches from full pressure to S5 pressure on gear change, but if it was faulty it would also effect 3-4th.

I would give the trans a good service first. And reset the EEC.
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Old 18-07-2012, 01:13 PM   #16
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Default Re: AU2 Sedan auto shifts hard from first to second

Is there a quick way to reset the ecu in an au xr8?
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Old 18-07-2012, 02:11 PM   #17
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Default Re: AU2 Sedan auto shifts hard from first to second

disconnect the battery for a little while
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