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Just curious, why you aren't going to use the pcm to run the trans?
Conversion from a stick and don't want to dick with finding and installing the correct harness?
Just curious, why you aren't going to use the pcm to run the trans?
Conversion from a stick and don't want to dick with finding and installing the correct harness?
ron
Ron,
I just had my tranny rebuilt and went with a B&M shift kit, a 9.5" TC (3600SS from Yank), 100 mm Maf (from SD Tune) and back to my original cam from Pete and new tune. That is a S-Load of changes at once. When I went to the track, something was telling it to shift out of 1st to 2nd gear at 8 mph then back to 1st at 28mph.... then ran fine for the remainder of the track. We worked on it all day with nothing changing those weird shift points.
Fast forward to today, I transferred some old trans data to my tune and got it to work correctly, but short shifting into 2nd at 5100 rpm and into 3rd at 5700 rpm. Just some fine tuning to do now to adjust to redline of 6150 rpm. Sure feels good to get it working on the stock PCM once again. Had the Hoosiers at 10psi hot and still had no traction till third gear hit.
Ron,
I just had my tranny rebuilt and went with a B&M shift kit, a 9.5" TC (3600SS from Yank), 100 mm Maf (from SD Tune) and back to my original cam from Pete and new tune. That is a S-Load of changes at once. When I went to the track, something was telling it to shift out of 1st to 2nd gear at 8 mph then back to 1st at 28mph.... then ran fine for the remainder of the track. We worked on it all day with nothing changing those weird shift points.
Fast forward to today, I transferred some old trans data to my tune and got it to work correctly, but short shifting into 2nd at 5100 rpm and into 3rd at 5700 rpm. Just some fine tuning to do now to adjust to redline of 6150 rpm. Sure feels good to get it working on the stock PCM once again. Had the Hoosiers at 10psi hot and still had no traction till third gear hit.
I totally spaced that out, sorry.
This is a drive by wire vehicle, right?
I wonder if the addition of the MAF had something to do with it?
As I tuned my MAF curve, the trans quit doing the 2-3 shift. So used this spread sheet to pick mph and rpm and bingo.
Might not be even close, but worth a look compared to your current settings.
Ron
The Maf was added after 2 years of the trans running perfect, but that was in my thoughts as one of the problems. It is cable operated, not Driveby. I still have no clue as to what was causing the shift to 2nd at 8mph. Crazy !! I still wonder if not getting any traction thru the gears was keeping it from doing the weird shifts. Back to the track to be sure.
Thanks for the spread sheets Ron, I will compare to my settings.