Knock Sensor Problem???

[BIG BAD CHEV]

i have a 00 silverado with a 5.3. I just had the tranny built and now it shifts so hard i get a knock sensor code. I was wondering if there was a way around this? My old truck did the same thing so i had to soften up the shifts but i dont want to do that. Any help would be greatly appreciated. Thanks

[RedHeartbeat]

sounds like you had 100% of the torque management removed from the PCM tune and now you need some of it put back in.

[BIG BAD CHEV]

No i havent had anything done to the ecm yet cause im doing a cam and a few other things so i was going to do the ecm after all that. Thanks

[C-WAY]

Yea he might need a bit of tuning.

[BIG BAD CHEV]

So this problem is fixable??

[GasGuzzler]

Need to know what kind of trans build it was if the tuning is stock. That's one helluva shift if it causes KR.

[farmtruc]

The pcs might be disconnected, in default mode = hard ass shifts (but a code would pop up.
Or, the trans builder turned the torx head on the pcs too much, OR, installed a bunch of washers and it's hitting hard.

If it's hitting hard in every gear, probably pcs related.
Just one gear = the builder just made it shift hard.

If it's shifting that hard, you need to go back into the trans to fix it.

[BIG BAD CHEV]

Ya its pretty hard in all gears but the 1-2 shift is the worst. I wanted it like that. It has 35x12.5 on it and it squaks them into second. The tranny was upgraderd to all billet parts and a stage 2 shift kit with corvett servos and much more. I truck pull the truck mostly. I was wondering if i could use that JET dynamic spectrum tuner program to make my own tune and turn the KR to 0 if that would do the trick? I dont want to keep sending my PCM out to be tuned cause im always changing the truck.

[BIG BAD CHEV]

What tune you using QUIK

[Justin_Inc]

stupid hard shifting = broken parts. shifts should be firm but no where near HARD. I wouldnt bother trying to take the hardness out with PCM tuning as its a band aid fix.