I went out and tried to capture a video of what I'm describing, Murphys law says it didn't want to play up, at first anyway, just before I got home again though it did play up just a little, as below:Chris570 wrote: 5-8 seconds??? does it slowly pickup and then go or is it nothing, then it wakes up?
It happens at 38 seconds, I'm going up a slight incline and have slowed right down for someone about to turn but I'm still in 2nd gear, then I suddenly accelerate about half throttle, I keep the throttle steady at half way for 6 seconds, you can see the road speed increasing but the rpm falling. Probably hard to pick up on video although listening to the engine note on headphones might make it more obvious.
It wasn't too bad during the recording, but when it gets really bad the engine rpm drops away without much if any increase in road speed, all with a constant throttle. The torque converter transitioning to lockup is what is triggering it due to the reduction in slip, but the problem is that the engine doesn't have the torque to hold the rpm steady and accelerate the car, instead the car stays at the same speed and just pulls the engine rpm down...
Surely not normal ? Remember too that that 6 second period was nearly half throttle in 2nd gear - and should have been far greater acceleration than that.
PS sorry for hijacking you thread Mike.