Hi again and thank you all for your replies so far!
I´ve looked around and Oregon Performance Transmission seems to have what I should be looking for in terms of both shift correction kit and electronics (like both
@Deancr11 and
@NickTransmissions suggested earlier in the thread, thanks!).
OPT have a kit with “everything” included, such as the Transgo SK4L60E, gaskets, sep.plates, pistons, corvette servo etc, which, at least to me, seems like a good, solid option.
There is however an option when ordering the kit for a .470 or .490 boost valve. I understand (or at least think I understand) what a boost valve does and from what I´ve read, it makes sense to replace it as well, but which one should I choose (if any)?
Also, do you think that the kit with the Transgo SK4L60E, a corvette servo and (maybe?) one of the boost valves would make the transmission shift too hard/aggressive for normal driving?
Link to the OPT shift kit:
https://www.oregonperformancetransmission.com/product/OPT-4L60E-VB1.html
Link to the solenoid kit:
https://www.oregonperformancetransmission.com/product/OPT-4L60E-EL.html
Really appreciate any input you could give me.
Thanks again!