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My stock 04 GTO shifts much firmer than other GM autos..why?

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Old 02-06-2005, 01:46 PM
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Default My stock 04 GTO shifts much firmer than other GM autos..why?

I have a bone stock 2004 GTO with the 4L65E tranny, and it shifts very nice, firm, quick, etc. (I am putting a Walboro intank 340 and a 150 shot...and that it!)..the car still has its TM, so why does this thing shift so well??? It feels like a late model car with TM delete and a shift kit.

Just curious, definately not complaining....

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Old 02-06-2005, 08:17 PM
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I used the GTO force motor table as the basis for my tune
fiddling (actually used MIN(GTO, 'vette) for the currents).
The GTO has a much lower current, thus higher line pressure
in its tune than other models I have seen.
Old 02-06-2005, 08:24 PM
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Originally Posted by jimmyblue
I used the GTO force motor table as the basis for my tune
fiddling (actually used MIN(GTO, 'vette) for the currents).
The GTO has a much lower current, thus higher line pressure
in its tune than other models I have seen.
That makes sense....I love the way it shifts stock...I was going to get TM delete, but I think I will keep everything stock and then spray a 150 shot and see if the tranny still shifts like it does now...I am really liking the GTO..

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