it was indeed the pink wiring powering the trans that did not have 12v on it, I supose it take it from somewhere else I didnt power up in the harness, then I got the speed sensor to read something as well and im out of limp mode and actualy shifting gears ! now I cant say if the calibration are good or undrivable but it is a pretty damn good start. I will post my finding soon for the people of the future tyvm for taking the time !
looks like 12202088 OS
Glad you got it figured out.
What Size tire and Ratio are you running?
Speedo Should be pretty close if you are running 3.42's and 26 inch tires,
If running something else, would be best to have the proper VSS settings, as shifting is scheduled by MPH, not RPM
Last edited by ralmo94; 12-24-2023 at 10:05 PM.
No need to re-invent the wheel. But we can make it better
3.42 and 215/70 r15 (26.85 inch.) but yeah I will need some fine tuning, its shifting a bit too fast at low throttle, and I know very litle about tcc lock and all that stuf so I need to comfirm that it is working as it should.
I think I went with a base calibration from a 2001 s-10 2wd wich seemed closer to my astro's spec than a 4x4 blazer.looks like 12202088 OS
215/70-15
751.13 revs per mile
751.13 * 3.42 gear ratio
=2568.8646 trans revolutions per mile
2568.8646 * 40 pules per rev =
102754.584 vss pulses per mile.
Change HO104 TOS Revolutions per mile to 2568.87
And HO101 VSS pulse per mile to 102754
And that should get things shifting at the MPH you tell it to.
Last edited by ralmo94; 12-25-2023 at 10:13 AM.
No need to re-invent the wheel. But we can make it better
what does 'ho104 tos' stand for ? I found the pulse per miles setting but not the other one
That's how it's labeled in the xdf I have. It's transmission revolutions per mileOriginally Posted by MikaelT
TOS is trans output shaft
Last edited by ralmo94; 12-26-2023 at 03:26 AM.
No need to re-invent the wheel. But we can make it better
got it, I was using universal patcher thats why ! ill look into those table in the morning, definatly a lot of data to digest. Realy apreciate you helping me out. Just blew my 350 on my k2500 and getting this van running was my only option to have something running again. tyvm
Attachment 19624
Here you can see up shift to 4th is commanded before lk in 3rd.
4th is set to lk at 46 mph
and 2nd lk is dissabled
Here is a copy of my spreadsheet I use to aid in shift schedules.
I already put in your stock tcc and shift tables for normal mode
It should help you visualize the changes you make and how it affects other parameters with the graphs.
No need to re-invent the wheel. But we can make it better
hey man thanks ! ill try this out and let you know, merry christmass
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