Trany shifts Hard down but easy up

[jacobmh27]

I am not even quite sure what tranny I have it is a stock tranny for a 2001 GTP. I do not know if the person before me did anything to it or not.

But anyway the car seems to drive perfect when starting to highway speeds the transmission feels perfect shifting through gears no lag firm shifts.

But when I am going say 40 or so and I step on the gas it seem that when it down shifts it is very hard. the kick down is kind of violent and the shift is very firm and I take off like a bat out of hell.

Is this normal I have only had the car for a short amount of time and was just wondering

 

[fst]

any ideas if the car was modded when you bought it? also did u check the fluid level when the car's at operating temps to see where the trans fluid level is at?

 

[jacobmh27]

I had the fluid changed when I bought the car All levels are correct
ANd I am not sure if the car had been modded or not the Engine still looks like you could eat off of it. A shift kit was the first thing I thought of but that should shift hard up and down no??

 

[jacobmh27]

Has anyone eles see this

 

[Trannyman95]

Without knowing anything about the car it is hard to say if a problem was built into it to cause this. If you have an aftermarket reprogrammed pcm then this makes sense as you shouldnt have a harsh downshift from 40mph which you are likely dropping back into 1st gear which was common on older aftermarket pcms. A stock pcm will not allow a kickdown into 1st gear at that speed. What are your full throttle upshift rpms at? If they are at around 5800 rpm then you have an aftermarket pcm your shift points will be this high, stock ones are set at around 5400 but often shift at 5600. If the pcm is stock then you could be having some trans problems such as worn clutches or some valve body problems.

 

[jacobmh27]

thanks I will check the up shift tonigt and see