transmission?

[leadfoot33]

hello everyone. i recently picked up a 2002 gmc sierra 1500 z71 5.3l it is a beautiful truck and runs great but i have a question just before it shifts into 3rd gear it seems like it does a surge of power then shift and even then the shift seems almost slow and has excessive amounts of rev in between like i would say by about 200 rpm or somthing in that area. it only does it when your applying the throttle a little harder and running the motor to shift around 3000 or when its wide open its more noticeable. does it in to/haul mode does not seem to matter. sorry for the long post. i am still learning about these new trucks give me my old 94 i can fix it lol this not as much :P

[pearsont74]

sounds like a sensor on this one....cheap to replace instead of takin it to a tranny shop IMO
Im replacing my TPS on my 96 5.7 in hopes to resolve some of my odd behavor to...NAPA has it for $37 but im new on these too.

[leadfoot33]

ya i was hearing that these things have like a servos in them or somtheing so i was wondering if that thign was actingf slow or somthing. lol

[scavanger]

Originally Posted by pearsont74

sounds like a sensor on this one....cheap to replace instead of takin it to a tranny shop IMO
Im replacing my TPS on my 96 5.7 in hopes to resolve some of my odd behavor to...NAPA has it for $37 but im new on these too.

You can check the TPS with a volt meter.. think it is .5 volts with throttle closed and about 5 wide open.. Attach the meter and slowly open the throttle and watch the voltage, should be a smooth increase any sudden drops or increases replace it.
I base the voltages on my vette manual and on the voltage on my 95 GMC 5.7 if I am way off on the voltage someone jump in and correct me.

Scav.

[bradrhale]

http://www.truckforum.org/forums/gen...tml#post131055

how to test

[leadfoot33]

so i took it to the tranny shop because in town they do free test drives. he thinks it might be alittle ball that falls into a hole in the tranny that causes it to shift or somthign like that. he thinks that the whole the ball falls into is oblonged or somthing. i go back in on monday for him to hook up the scanner at no charge. its just so weird lol

[Crmzendrgone]

I would think not for sure but by 2002 the computer does all the shifting with solenoids I dont think there are check balls any more but I could and probably am way wrong.

[leadfoot33]

i appreciate the info. all the info is helpful for me lol