Over the weekend I swapped my sons 99 Regal LS trans and put in a 99 Intrigue (l36) and everything went fine.



Now I'm getting incorrect gear ratio.



I've tried tables from a...



04 GP GT

98 Intrigue

98 Monte Carlo Z34

My 03 GS (with 3.29's)

Kept his 99 LS table

my 98 Lumina LTZ 3.29 tables from years ago

A few others



I've copied entire trans tables over in the bin file and still the same thing after about 10-15 minutes of driving. Everything is fine to begin with but then starts banging gears.

The axles fit fine, TC that came with the trans bolted up fine. Nothing else out of the ordinary.

What am I missing? Is it an issue with the gear ratio in the tune or something hardware I can look for?