View Full Version : Shift Point on Grand Am's
11-11-2010, 08:31 PM
Ok well i bought my second grand am 2 weeks ago, moving down from my 2004 GA GT to the new 2005 GA SE. Well anyways i was messing around with it and my shift points are alittle different than my old gt. My old Gt would shift at 6k rpm while the SE goes passed that and almost redlines then shifts. Is that normal?
11-11-2010, 08:52 PM
The final drive ratios are different between the GT and SE, but that will only slightly affect the engine rpm for part throttle shift points because those are based on speed vs throttle position. For full throttle shifts, it is based on engine rpm. If the engine seems to rev higher and the shifts seem to take longer that could be a sign of the trans getting worn. The clutches could be worn out and taking longer to grab, or it could be reduced line pressure. New fluid and filter, and a more aggressive shift program may help it a bit, but they would really only band aid the problem if that is what's happening.
11-11-2010, 09:05 PM
Hmm, i just purchased the car, it has 80K miles and was driven by a grandma. Could my tranny allready be showing signs of failure/worn at 80k? if so how long will it be before i start seeing some real problems with it. i.e. i was given a 2 month or 2000 mile warranty on engine and tranny.
11-11-2010, 09:28 PM
what egine is in the SE? the 4cyls may shift at a diffrent RPM then the v6
11-11-2010, 09:36 PM
Its the 2.2L, i thought that maybe because the engines were different the tranny may act different to it then my GT with the v6 but wasnt for sure.
11-11-2010, 09:52 PM
yeah, that could be it too. The 4cyl has an even more different transmission with different ratios and probably has different shift programming for the different engine.
11-11-2010, 10:17 PM
Just for S***s and giggles, here is a picture to better describe. IT shifts at the same point, same gear(pretty sure of 1st and 2nd, i dont dog my ride) and every time
11-12-2010, 01:05 AM
thats about where my 02 GA GT1 shifts when i pin it and ive got 200,000km on mine :/
11-12-2010, 02:14 AM
That's normal for the 4 banger, but i would not let it rev that high, Just ease off the gas a little around 5600, and it will change. What kind of sucks and is good at the same time. The 99+ 2.4 auto has a little longer gears than the 2.2. I think my car went into 3rd at 80mph@6500.
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