Stuck in 1st

[Bashy]

Hi folks

Here is something I put down to a 1 off but, it's deffo more than that, especially after about 6 times...

If it give it big licks in 1st, it will not change gear, it will just bounce off the red until I back off the throttle, then it will change to second or allow me to tronic its ass, thats right, i cannot up change in manual either, unless i backoff the throttle.

There is nothing in Vida that points to anything other than the mirror(s) potentiometers.

I am sure you can understand, this i quite dangerous, more so when i dont hesitate from a junction etc, having to back off makes the car ya just nipped in front off get far too close for comfort :/

[Laird Scooby]

Originally Posted by Bashy

Hi folks

Here is something I put down to a 1 off but, it's deffo more than that, especially after about 6 times...

If it give it big licks in 1st, it will not change gear, it will just bounce off the red until I back off the throttle, then it will change to second or allow me to tronic its ass, thats right, i cannot up change in manual either, unless i backoff the throttle.

There is nothing in Vida that points to anything other than the mirror(s) potentiometers.

I am sure you can understand, this i quite dangerous, more so when i dont hesitate from a junction etc, having to back off makes the car ya just nipped in front off get far too close for comfort :/

Once you get it in to 2nd, if you get it above the speed at which it will kickdown back into 1st, what happens if your bury the throttle in 2nd? Does it hold on to 2nd and bounce it off the governor until you ease off the loud pedal?

If so, i'd suspect the kickdown cable has become snagged, often caused by letting go of the loud pedal suddenly from a wide open position.

If not and it's only in 1st that it does it, i'd suspect a few other things, not necessarily in order but gear select switch (assuming it's an electronically controlled box), TPS (Throttle Position Switch), engine speed sensor, road speed sensor (or similar) in the gearbox and possibly something else.

With the throttle at rest, there should be a small amount of slack in the kickdown cable, if there isn't then i'd check to see if it has got snagged, perhaps on the quadrant on the throttle spindle or what would pass as the throttle spindle on a diesel.

[Bashy]

Originally Posted by Laird Scooby

Once you get it in to 2nd, if you get it above the speed at which it will kickdown back into 1st, what happens if your bury the throttle in 2nd? Does it hold on to 2nd and bounce it off the governor until you ease off the loud pedal?

If so, i'd suspect the kickdown cable has become snagged, often caused by letting go of the loud pedal suddenly from a wide open position.

If not and it's only in 1st that it does it, i'd suspect a few other things, not necessarily in order but gear select switch (assuming it's an electronically controlled box), TPS (Throttle Position Switch), engine speed sensor, road speed sensor (or similar) in the gearbox and possibly something else.

With the throttle at rest, there should be a small amount of slack in the kickdown cable, if there isn't then i'd check to see if it has got snagged, perhaps on the quadrant on the throttle spindle or what would pass as the throttle spindle on a diesel.

Hi, I am fairly sure that its only 1st gear that shows this issue, i have deffo opened her up through the gears, in auto and manual, and i am fairly sure when its bounced on the red in manual, it changed when requested, i would need to verify this mind to be certain.

I will also do the Vida check too, just to be sure, The reason i said it was ok before was that no issues relating to this has ever shown and i have certainly put Vida on after an event, 100% on that, but i will do it after the test...

[barrybritcher]

Originally Posted by Bashy

Hi folks

Here is something I put down to a 1 off but, it's deffo more than that, especially after about 6 times...

If it give it big licks in 1st, it will not change gear, it will just bounce off the red until I back off the throttle, then it will change to second or allow me to tronic its ass, thats right, i cannot up change in manual either, unless i backoff the throttle.

There is nothing in Vida that points to anything other than the mirror(s) potentiometers.

I am sure you can understand, this i quite dangerous, more so when i dont hesitate from a junction etc, having to back off makes the car ya just nipped in front off get far too close for comfort :/

contrary to what volvo say, I found the early s60s to not shift up automatically in manual mode. ie it will bounce of limiter until you do something. it will only shift down to prevent stall

[barrybritcher]

I've just read a pdf which confirms the same - you must manually shift up.

down shifting is automatic

[barrybritcher]

https://www.myvolvolibrary.info/Tech...os/AW55-50.pdf

[Bashy]

Not my box, mines the other TF-80SC, 6 speed plus, in manual mode, it shouldnt auto up shift at all as its not in automatic, you have to knock the gearstick to up change, although it will automatically downshift if the speed is below a set speed, like it says for the AW55-50.

[Kev0607]

It sounds as if there's a module or sensor that might be faulty, possibly the Transmission Control Module. It sounds as if the module/sensor isn't telling the transmission to shift.

Has the transmission had a fluid service?

Is the fluid level correct?

No banging or clunking into gears?

Transmission software ever been updated?

[Laird Scooby]

Originally Posted by Kev0607

It sounds as if there's a module or sensor that might be faulty, possibly the Transmission Control Module. It sounds as if the module/sensor isn't telling the transmission to shift.

Has the transmission had a fluid service?

Is the fluid level correct?

No banging or clunking into gears?

Transmission software ever been updated?

That's more or less what i suggested further up. Not sure on his software but he did the fluid not long ago. Any other suggestions that you can think of? I'm out except for perhaps the kickdown cable as mentioned further up.

[Kev0607]

Originally Posted by Laird Scooby

That's more or less what i suggested further up. Not sure on his software but he did the fluid not long ago. Any other suggestions that you can think of? I'm out except for perhaps the kickdown cable as mentioned further up.

Yes, your post did mention the points that jumped to mind for me.

The kickdown cable is a good one, possibly snagged somewhere.

My other suggestion would be a bad solenoid inside the valve body? That's a bit of a wild one I admit, but its a potential culprit.

What Bashy is experiencing does sound dangerous. Without stating the obvious, it needs investigating as soon as possible because its not normal.

Any good transmission places near you Bashy? Its worth a visit & hopefully you can replicate exactly what's happening on a short drive.