Transmission problems?

[kewljay223]

Just thought of this, are you stating what rpm your gauge is showing or scan data? I'm guessing you're going by the gauge. If so, your tach out put parameter in the tune probably needs to be updated. I recently worked on an S10 with a 4.3-5.3 swap and at 2200rpm, the gauge indicated 3000. I played with the tach output parameters and got it within 100rpm at 3k.

I have thought of this also, but when I check my scanner rpm, it matches what my gauge is showing. So I didn't think it was off or that there was a problem...

But now I'm wondering do the readings I get on my scanner and my gauge come from the same "output parameter" or are they separate? I assumed they were seperate and the reading I see on the scanner is always "true" and the one from the gauge is what can be altered. And since they are equal, I figured the calibration was correct. Is this how it works?

[vortecyota]

Kewljay, I have a feeling this may apply to your truck as well. Y'all let us know, help us all learn!

[SageB82]

I'm running a 4l60e. Turns out the engine I got is a flex fuel model and and it's a regular 5.3. I'm not sure what the gear ratio is but I've been thinking about looking into that. The trans isn't to worn but it's always acted up a bit here n there. It feels like its locking up so I'm a slight but disgusted. who wants to be limited to that. I got passed by a smart car on the freeway!!!! I've recently discovered a place that has turbo kits for GM's. How do I go about doing this tach output parameter nonsense

[vortecyota]

Jay, you're right. The engine rpm values scan data are always correct no matter what, the tach output to the dash is the only thing that is adjustable. Dang, I thought I might have helped you out

Sage, the parameters can be altered using tuning software but to start with, you need to monitor actual engine rpm with a scan tool and compare with what your dash mounted tach is showing.

[SageB82]

well its down to checking the tach parameters, hopefully thats the problem because i now have a rebuilt transmission. like i said before it acted up so it needed it anyways other than that ill be looking at the rear end next

[SageB82]

Tach needs to be reprogrammed, the dash is reading that it still has a V6. Just thought I'd tell everyone