pulse generator is bad
6 e-gear shifts
Could be the gears slipping. Might need new gearbox.
It runs to the modulator valve from the intake manifold. Its what makes an automatic trany shift thru the gears. Low vacum = quick shifts and High vacum = long between shifts.
gears are slipping or not enuff fluid in transmission
2006 ion shifts hard
More than likely, bad motor mounts
syncro??
Replace the chain and both the cam and crankshaft gears.
A car will sound very rough and jerky when it shifts between gears. It may stall and almost seem to sputter. This is a dangerous situation as it can completely cut out suddenly.
Count how many time it shifts gears. If it shifts 3 times it is 4 speed or 2 times it is a 3 speed.
That may be exactly what is happening. You may be accelerating at the moment it is trying to complete the downshift and you catch it between gears.That may be exactly what is happening. You may be accelerating at the moment it is trying to complete the downshift and you catch it between gears.
If it shifts smothly into the gears before o/d it is not the cable.