VX v6 series 2 - 340,000 k's changing into 2nd auto transmission issue

NeddyBear

Veteran Mountain Biker
Wondering if anyone might have come up against this auto transmission issue.

I take off from the lights and the transmission doesn't want to change up into second so we have to back off a tad and go again and it chances up straight away.

The transmission seems to be doing this about 50 percent of the time and other than this issue everything else is good.

Highway cruising is perfect and so is driving around town, it just seems to be when we power off from the lights.
 

immortality

Can't live without smoky bacon!
Staff member
Try the TPS.
 

losh1971

Well-Known Member
X2 i was thinking TPS. Is it revving out in first? Because that is a classic sign of faulty TPS.
 

NeddyBear

Veteran Mountain Biker
Thanks guys, what's the TPS and no its no revving just doesn't want to change up without tickling it.
 

immortality

Can't live without smoky bacon!
Staff member
Throttle Position Sensor.
 

losh1971

Well-Known Member
You can test the TPS with a multimeter.
 

losh1971

Well-Known Member
If it's not shifting up then the revs must be going up. I have replaced my TPS twice. First time it started by not shifting up, unless you back off and then go again. It would labor and rev out to 3k or more before changing. Let it go long enough and you will lose all shifts and will need to nurse it home or to a workshop while manual shifting.
 
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Lex

Well-Known Member
The tps is located on the front of the throttle body.
The sensor that is closer to the front of the car.
 
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Trevor loves holden.

Well-Known Member
The tps is located on the front of the throttle body.
Well sort of its on the left of the TB the front is the inlet side, do you have a multimeter if so your tps should start almost at 0 and work its way up to 5v fully opened. See if its not bouncing as it climbs to 5v.
 

NeddyBear

Veteran Mountain Biker
Throttle Position Sensor thanks, we changed that one with a genuine Holden product 150,000 k's ago.
I'll see if Repco has one or can order one.
 

Trevor loves holden.

Well-Known Member
Also don't count these out. From FATMOE, Mar 16, 2012
2. 1-2 shift does not happen at WOT until you let off the gas: Best case: try replacing the TPS. Middle case: leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. Worst case: poor line pressure rise (see below).

3. 1-2 Shift shudder at WOT; delayed or abnormal 1-2 shift; There's a problem ONLY on the 1-2 shift: 1-2 accumulator piston cracked or stuck cocked in the bore. Check the yellow spring inside the vacuum housing for breakage. Also, if the accumulator housing walls are scored, the housing must be replaced. Easy fix in the pan.

4. 1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace.

5. Trans does not upshift out of first, speedometer reads zero at all times: VSS failure. Easy fix on rear of transmission, but xmember must come out to access VSS.
 

NeddyBear

Veteran Mountain Biker
Picked up the Repco sensor today, now to install it when the temp gets below 40.
 
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