Tourque Conv.? Throttle Body? Trans.?

[troy1]

I've never seen a 4th shaft from the factory that is hardened Bob I think its just a rumor

[BNaylor]

Originally Posted by troy1

I've never seen a 4th shaft from the factory that is hardened Bob I think its just a rumor

Didn't you start that rumor? Check your old posts on when you replaced yours.

Back to the topic any thing else to add Mr. Tranny Guru?

BTW - Here is another member with a suspected tranny problem.

http://www.automotiveforums.com/vbul...d.php?t=676133

[nate2424]

....
Troy1, did I hear right, you replaced your own 4th gear? is this something that I can do?? I would love to hear more, or be linked to some detailed instruction as to how this process is done, am I removing the cradle, pulling the engine?

[troy1]

hummmmm show me that post Bob. Delco ones are hardened. Doing a 4th shaft it a very detailed job. You would have to be an above average DIYer to do this.

[nate2424]

actually I read your posts on how to do this. I have the detailed instructions, so I will probably make the attempt. I also read that the trans rebuild kit is only approx $150, just need the weekend to get it out, and take it apart, and put it back in. Now all I need to know is if the trans needs a rebuild kit, or if the solonoid is bad.
Thanks for all the info gentlemen, I will keep this updated as all the information is gathered.

[BNaylor]

Originally Posted by troy1

hummmmm show me that post Bob. Delco ones are hardened. Doing a 4th shaft it a very detailed job. You would have to be an above average DIYer to do this.

If you check my posts in this thread where I referred to hardened spline/shaft I recall mentioning something about the replacement ones. But here is that post of yours.

http://www.automotiveforums.com/vbul...2&postcount=10

Originally Posted by Troy1

New hardened slpine 4th shaft YIPPY.

[troy1]

Yea I was refering to the Delco ones in that thread. I would do all the solenoids nate any questions just ask I would plan on 2 weekends so you can take your time. Order a 4t65E ATSG manual too.

[robkiehl21]

I have a '97 gtp with 102k, and my transmission does basically the same thing.. won't shift into 4th at some times.. What it does is right when i start out, upto like 15 miles of driving it will shift right into 4th with no problems, then it seems that once it gets heated up enough, about 15 miles it was in the summer it will stay in 3rd and be at about 3000-3300 rpm at 65-70mph... Now in the winter here i just drove a 60 mile trip the other day and it went to 4th the whole time... All of these signs have led me to believe that something in the transmission causes 4th gear not to go when it gets to a certain temperature.. When i drove 60 miles the other day it was about 5 degrees out so that is why i think it went to 4th the entire time was because of the cold weather.. I am still not sure about whether the transmission is bad, all the gears shift fine, just that 4th problem is the only problem.. My ses light has been on, i got it scanned and the code was 'input turbine speed sensor'.. i don't exactly know what that means, does anyone here know?

[BNaylor]

Originally Posted by robkiehl21

I have a '97 gtp with 102k, and my transmission does basically the same thing.. won't shift into 4th at some times.. What it does is right when i start out, upto like 15 miles of driving it will shift right into 4th with no problems, then it seems that once it gets heated up enough, about 15 miles it was in the summer it will stay in 3rd and be at about 3000-3300 rpm at 65-70mph... Now in the winter here i just drove a 60 mile trip the other day and it went to 4th the whole time... All of these signs have led me to believe that something in the transmission causes 4th gear not to go when it gets to a certain temperature.. When i drove 60 miles the other day it was about 5 degrees out so that is why i think it went to 4th the entire time was because of the cold weather.. I am still not sure about whether the transmission is bad, all the gears shift fine, just that 4th problem is the only problem.. My ses light has been on, i got it scanned and the code was 'input turbine speed sensor'.. i don't exactly know what that means, does anyone here know?

Do you have the specific DTC code?

It sounds like you have a different problem than what we have been discussing. The input speed sensor is used to provide a reference so the tranny knows when to shift, etc. It appears temperature related because when the respective DTCs set such as P0716 or P0717 the PCM module is forced to use a default TFT (transmission fluid temperature) value from the engine coolant temperature sensor (ECT) and intake air temperature sensor (IAT) in the absense of the input speed sensor signal either due to no signal or a circuit performance problem. Also, when these DTCs set shift adapts are disabled.

The input speed sensor is located on the case cover assembly where the 3-4 accumulator is located.