i have a 97 z28 vert 30th ann
can some one tell me at what rpms does there z shift when at wot mine is going all the to 6 grand witch is in the red is this normal i have no power from 5500 witch is the redline up to 6000 when it shifts

 

I'm assuming you have the A4 since most people wouldn't rev their car to 6 grand and then switch gears. But mine usually changes gears right before it hits 2k rpm going from 0-15mph under light throttle. And does that when driving normally. If I floor it, it usually changes around 4-5k.

 

i thought so is it possible that the prev. owner did some kind of tune to it or is there a way to fix this without a tune and yes its a auto trans

 

It could be a tune problem, but most likely it is a transmission problem, usually weak shift solenoids, or even maladjusted shift linkage.
Check this sticky out:
https://camaroforums.com/forum/trans...roblems-51998/

 

should shift at 5500 so like pete is sayin, something is not right. do you have a aftermarket tune or one of them cheap tune chip/box?

 

not that i know of ive only owned the car for maybe 8 months. the car has 90,000 on it and the motor has about 30,000 on it. the block on the first motor cracked and i do have all the paper work for the swap from a chevy dealer. it will do it in all gears it shifts fine at all times regardless of how i drive it. i didnt think they made one of those chips you put in the computer for obd2 cars doesnt it have to be reprogramed.

 

they dont make the add on chips that work for a obd2, lol, thats why i was asking. see what your throttle position sensor is reading at wot. is the speedo and tach workin right? no jumping around or anything.

 

nope speedo and tach work perfect i will check the tps sensor this weekend anybody know witch wires to probe on it

 

blue and to ground. if i remember right should be .67 volts at idle and 4.5 at wot

 

I have the same care, but T Tops. Shifts anywhere from 5700-6000. I usually start backing off at 5500 since there is little gain. SLP cold air intake and cat back. Not sure if previous owner played with the computer. It will lay tire on the 1-2 upshift with the stick in D. (even with the A/C on) The traction control is really annoying on the 1-2 shift. It turns it into Grandma mode for a few seconds. Always forget to disable after takeoff.