G35x sudden down shifting causing extreme jerking motion
#1
G35x sudden down shifting causing extreme jerking motion
Shortly after reaching the 2500 mile mark, my 2007 G35x started down shifting from 2nd to 1st rather abruptly and causing some major jerking. I noticed it most when slowing down and my speed is at or near 7-5 miles per hr. Has anyone else noticed this?
Last edited by tromyj; 04-19-2007 at 05:30 PM.
#2
Originally Posted by tromyj
Shortly after reaching the 2500 mile mark, my 2007 G35x started down shifting from 2nd to 1st rather abruptly and causing some major jerking. I noticed it most when slowing down and my speed is at or near 15 miles per hr. Has anyone else noticed this?
Its too fast !!!
If it all downshifts to 1, it should be at something like 5 mph or lower
If you can reproduce it easily, just take it to the dealer ..... its probably harming the drivetrain with that abrupt downshifts.
#6
Originally Posted by Altersys
that's pretty slow. my car downshifts early too. it might be more pronounced on the AWD version since the front tires will "dig in" and cause the body to pitch forward.
I have not noticed this as a concern on my S, although when the car downshifts to 1st it is noticeable (partly because the brakes are already on, and this adds braking force).
#7
Yes I have also experienced this. However, it does not happen on all second to first downshifts. I have also noticed that the rev matching does not work as well when going into second from third or into first from second (it is not a smooth as the other downshifts). From fifth to fourth or fourth to third it works like a charm.
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#8
Originally Posted by G35Now!
Don't think so - thought I read that the X will only send power to the front wheels if it finds wheel slip in the rear? You'd think that means no direct connection, and thus bite, on the front wheels at this speed?
good point. not sure how the front drive wheels work under braking forces vs acceleration forces. There could be a difference.
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