Vt brake upgrade into an early girl

[Wade]

was also going through the 5 liter tunes and xdf's. looks like the earlier stuff didn't have bump spark or possibly 3rd gear tcc lockup. I think the 5D xdf has 3rd gear tcc lockup, but the other xdf"s don't, same as 12p? I started digging a little deeper and doesn't look like some of that stuffs even there.

[Wade]

I don’t no wtf the go is with this either. Ordered a new external fuel pump and fuel hose for it. As the genuine external pumps are larger on one end. Rather than trying to force a smaller hose onto it. There’s no way these hoses are gunna work.

[immortality]

was also going through the 5 liter tunes and xdf's. looks like the earlier stuff didn't have bump spark or possibly 3rd gear tcc lockup. I think the 5D xdf has 3rd gear tcc lockup, but the other xdf"s don't, same as 12p? I started digging a little deeper and doesn't look like some of that stuffs even there.

Holden really were way off with their trans tuning, especially anything pre VT where the strategy was get it into 4th ASAP and stay there. Much better to stay in 3rd with converter lock until you reach higher speeds requiring 4th gear. Pushing against the converter in 4th all the time just creates heat in the trans fluid.

[Wade]

Yeah but I don’t think 12p has 3rd gear tcc lock up?

[immortality]

Oops, I'm probably thinking 11p with the 4L60e trans.

[vlad01]

12P default TCC lockup is at around 60 or 70ks, the older tunes in VP and such ran it at about the 80-90 range, so the later tunes were actually even worse in this regard. When I got my auto built, I found this issue when switching to 12P, the TCC was very early and it bogged it down. I feel like the TCC was active in both 3rd and 4th since I recall the setting was on road speed only, but I could be wrong.

[Wade]

Yeah I’m not sure. I’ll have to have a closer look at it all. Put a brand new battery in it as well, and only a couple days later the indicator window was white. So I’ll have to get the multimeter out as well. Starting to remember why I don’t work on cars much anymore

[antus]

12P doesnt have a 3rd gear input or calculate it from a combination of RPM and road speed. Not sure 5D knows the mechanical auto is in 3rd either.

[Wade]

Well that would explain why 3rd gear tcc isn’t there. I think 4th is road speed vs tps%, will have to have another look.

[Wade]

Looks like the vx ss calipers need new seals. And the vy master/booster I’ve got is for abs. But the vq don’t have abs. Are they still interchangeable? And has anyone got suggestions on brands for the new seals?