I just bought an 05 wagon that came with an 18g + fuel mods. 1-2 & 2-3 shift fine, but when I do a WOT pull in 3rd, at 5k rpm's exactly it starts to bounce off the rev limiter. I haven't gotten 4th gear up to 5k. If I manually shift at 4500, it's fine, rev limiter only hits if i stay on the gas trying to get higher RPM's.
I've searched and found 3 options:
1) engine revs faster than tranny can shift (fixed with this VB mod)
2) worn clutch packs
3) ECU/TCU tune issue
Anyone experience something similar?