700r4 ? slow 2-3 shift @6000

1989gta
09-10-2002, 03:01 PM
when i'm going from 2-3 it takes a long time to shift when i hold it above 6000 and with the n20 it caused an n20 back fire. But if i shift at like 5000 it snapps into gear. Is there a way to correct this problem. It does not do this from 1-2 shift.
Some one told me these trannys were known for this problem but did not give any advice.