the speedo comes from the VSS signal which is taken from the reluctor on the trans output shaft. So I thought I'd just check here first.Īs NOD1H has said, it's a lot of money if it don't work, but if it does, it could be the best upgrade in the box (Well apart from a 300m input drum). What worried me was on the PATC site it referred to certian setups throwing ratio codes. It would be handy to know if there are any guys who have used it to change the ratios successfully in similar circumstances.
What I was really getting at was with the gearbox ratio calibration applet, I recall vaguely there were some issues with the software and calculations and I did have problems using it to (unsuccessfuly) recalibrate my speedo from kmh to mph. I suppose the stall is also affected by where the cam is as well, but there is a definite advantage to having a tighter stall when you have a dual purpose truck, i.e. I do like the closer ratios, you don't need as loose a stall converter as you do with the stock ratios. The PCM transmission calibration has editable gear ratios, see D1201-2 and D4601.
but, to be sure contact PATC and ask them directly. My understanding is that the gearset fits the 4L65E (4L65E is interchangeable with 4L60E). Do you mean the 6-pinion gearset from PATC (find "6 pinion" on this page): ()
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