Hard hitting when shifting [Archive] - GrandAmGT.com Forum


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03-05-2008, 01:37 PM
I have searched, but couldn't find much on the subject...
Sometimes when I'm driving the transmission will just start to hit very hard into every gear when upshifting. When stopped it will do the same thing into drive and reverse. This continues until I turn the car off and let it sit for awhile, then it seems fine agian. I havn't been able to narrow down the cause, so if someone could please help! Thanks in advance.

03-05-2008, 01:46 PM
Check your battery and alternator first.

03-05-2008, 03:43 PM
check your maf sensor/maf sensor connections.

03-05-2008, 03:53 PM
check your maf sensor/maf sensor connections.

x2. This sensor will make the tranny buck and slam if it is going bad. The battery cables should be checked too because they also have an affect on how the GA operates. Over time the connections corrode and dont allow the battery to charge up properly and cause all sorts of goofyness.

03-05-2008, 04:27 PM
X3 ^^

03-07-2008, 05:00 PM
First, thanks for the replies, second, I'm almost certian my battery and alt are fine, I don't have the time to actually get them tested however.

Second, It might actually be the MAF, I bought the car and It didn't have a screen on the sensor, and it looks pretty caked with dirt when I take it apart, so I guess I should clean it or replace it entirely?

03-11-2008, 02:40 PM
Could this also happen if my thermostat is sticking? I've noticed that it will stay at 200 exactly when this starts to happen. thanks

03-11-2008, 08:18 PM
yah check all those and clean the maf...also make sure to check ur mounts the front and rear namely, they have the tendency to shred the rubber holding them in

03-13-2008, 07:32 PM
i would say the MAF. i had put in my cai and forgot to hook the maf back up and i had that problem. figured out that it was disconnected and reconnected it and problem solved.