Btr 4 Speed Tripping Out

[ratter]

Hi ratter, yesterday we put the standard tune back in the car, an it didnt change a thing, would you know if the cruise control an my back brake lights would have anything to do with how my gearbox is behaving, they seem to have a mind of its own, because they work sometimes, an then they stop working.

Another thing ratter with the cars that you have seen with the similar dramas that my gearbox is doing, did they have all gears from 1 to 4 in tiptronic mode, or did they miss first gear?

If I cant sort this problem,do you thing the next best thing to do would be changing the valve body to standard to see what happens?

thanks for your help ratter

I doubt your brake lights would have any affect, but strange things happen with modern electrics.

yes the problem cars I have seen had all 4 gears in manual mode but all took off in 2nd gear in either automatic mode.

[ratter]

yes. remove the valve body and put a stock one back in. I still think you have a manualized valve body that's causing the issue.

A manualized valve body has no automatic changing functions at all

[Adam]

Cruise control will not work if you've got a brake light problem.

If your brake light fuse is blown then cruise control won't work.

I agree with the others. Your auto is the problem.

Who built it?

I'm not sure how a faulty TPS sensor would cause what you're describing. A scan of the car would show a TPS fault if there was one.

[xr6t_ute]

I knew of a couple of ppl taking off in second in the 4 speed auto and it was definately not in the tune itself.

[CCCC]

This cruise issue and back brakes sounds like its in the Tune. Have you contacted CV yet?

Hi spoolxr6, I have not yet contacted c&v, but il be contacting them on monday, an see what they reckon.

[CCCC]

I doubt your brake lights would have any affect, but strange things happen with modern electrics.

yes the problem cars I have seen had all 4 gears in manual mode but all took off in 2nd gear in either automatic mode.

Thanks ratter for all your help mate, it looks like im gonna start with the gearbox an pull out the valve body an put a new one in, an see if it makes a change, the weird thing with the box is no matter how low we try an adjust the line presure it is still shifting hard, an that's with changing all the solinoids.

[CCCC]

yes. remove the valve body and put a stock one back in. I still think you have a manualized valve body that's causing the issue.

Yea *Beep* that's what im going to do, put the stock one back in an see if it makes a change.

[ratter]

Thanks ratter for all your help mate, it looks like im gonna start with the gearbox an pull out the valve body an put a new one in, an see if it makes a change, the weird thing with the box is no matter how low we try an adjust the line presure it is still shifting hard, an that's with changing all the solinoids.

Before changing the valve body, also check to see whether the auto builder has done any other trans mods.

He may have drilled something which may allow greater pressure to a clutch pack for example.

[spoolxr6]

Was this another experimental box from Dominellos? I thought he had them sorted out by now??

[CCCC]

Before changing the valve body, also check to see whether the auto builder has done any other trans mods.

He may have drilled something which may allow greater pressure to a clutch pack for example.

Yea for sure ratter, il let my transmission guy sort it out, thanks for the info.