2009 Silvy with 4L80E swap ... can someone look over the TCM file?

[Mean Green Z28]

Just need to make sure everything in there is good as it is. The only changes I've made are updating the gear ratios from 4L60E to 4L80E values and adjusting speedo tire revs/mile ... someone may have been in there in the past, just not sure if they did anything else. I can't seem to find any files to compare and the repository seems to be offline.

Thanks in advance!

[joecar]

I'm look thru you file, I'll post back later today.

Did you repin the harness...?

[Mean Green Z28]

I'm look thru you file, I'll post back later today.

Did you repin the harness...?

Thanks

Using a Frost adapter harness with the external PDNDL switch harness pinned in. Previous pwner only set it up with the neutral safety part of it jumped to stock harness, nothing worked through BMC and no-lockup. Now lock-up etc. and all the BCM features work after I added the PRNDL option. The early Frost harness didn't have the PRNDL connector on it since that was part of the vehicle harness and not internal to trans like in 2009

[joecar]

The Frost harness is for driving a 4L80E from a 4L80E segment, correct...?


( i.e. not the other harness which drives a 4L80E from a 4L60E segment )

[Mean Green Z28]

Well, from talking to him, it didn't need anything but the harness and no segment swap was needed. How would I know that a segment swap is needed? Everything seems to work and shift correctly; although a little too firm.
Is there a way to test two different files with/without?

[Mean Green Z28]

This is what's used ... http://www.tunedbyfrost.com/products_dev1.htm

with the following leg pinned in...

19595

[BLK02WS6]

Joe - this is the same truck I have been working on - he is working on the transmission while I try to figure out the tune. It is controlled by a T42 controller - when you do a 4L80E swap on these, you don't swap segments do you? not sure how you could...

[Mean Green Z28]

So the only thing glaring I saw against another tune someone else uploaded here is the 1st gear wot setting from speed only (what was) to speed and rpm (what is now) ... it may be my imagination but with the gear ratios and this change that I just reflashed, truck behaves a bit better around town

Sent from my SAMSUNG-SM-G900A using Tapatalk

[joecar]

Since this is a T42 (can't do segment swap) from a 4L60E, you have to use Frost's cable (which uses a relay to invert the 2-3 Shift signal and uses the TCC On/Off signal to drive the TCC).

[joecar]

I'm still going thru your tune.

What rear axle gear ratio do you have...?

What tire size...?

[Mean Green Z28]

275/55-20 and GU6 3.42 ... I think I used 3.73 when I calculated oops

Sent from my SAMSUNG-SM-G900A using Tapatalk

[Lextech]

Here is a 2009 T42 4L80 calibration. It is stock other than the VIN being changed for a project. Maybe this might help.

Jeff

[Mean Green Z28]

Thanks I'll check it out

Sent from my SAMSUNG-SM-G900A using Tapatalk

[joecar]

Jeff, thanks :cheers:

[Mean Green Z28]

Hmm that's a lot of stuff that's different. Wonder if I should change vin and flash it after fixing gearing

Sent from my SAMSUNG-SM-G900A using Tapatalk

[joecar]

In that file the WOT MPH shift parameters are upside down (from the factory).

[Mean Green Z28]

Which table?

Sent from my SAMSUNG-SM-G900A using Tapatalk

[joecar]

The WOT shift MPH parameters:

D1011 vs D1061 (and others)
D2011 vs D2061 (and others)
D3011 vs D3061 (and others)

the downshift MPH has to be below the upshift MPH.

[Mean Green Z28]

The WOT shift MPH parameters:

D1011 vs D1061 (and others)
D2011 vs D2061 (and others)
D3011 vs D3061 (and others)

the downshift MPH has to be below the upshift MPH.
Thanks will look at it

Sent from my SAMSUNG-SM-G900A using Tapatalk

[bubba68ss]

Is there a 2012 vehicle 4l80e calibration I can use in my t42?

[joecar]

I don't know of any.