06 trans slips at 70mph or above

[walk76z]

I have a 06 Grand Prix and the trans will slip at 70mph and above should i try to change fluid or what??
Thanks Brian

[Explicit_Spade]

Is the fluid low or miscolored?

[walk76z]

Looks fine not low

[Explicit_Spade]

A fluid and filter change (don't flush) might be good for it, but I don't think it's going to solve your issue.

It sounds like you may have a problem with line pressure or the torque converter maybe?

[walk76z]

I dont know why it only slips at 70mph and above
Thinking it might be electrial?

[matt5112]

how do you know its slipping?

[walk76z]

the tack jumps up while the power goes down

[Jakescoots]

Is it like either of these?
Grand Prix Tach - YouTube
rpm and ltft - YouTube

[walk76z]

its like the first one

[dsmuts]

Torque converter problems?

[Explicit_Spade]

From the description it sounds like the converter isn't locking up.

[Jakescoots]

Your converter isn't locking up all the time then

[walk76z]

is there any fixing or should i change the converter

[BillBoost37]

I'd ensure everything igniton wise is good first. Check tps and maf.

All that will contribute to TCC lockup kicking in and out etc. High load, low rpm at 70 on our setup. Which means ignition is important.