I think your right. But it will show a weak or under performing solenoid.

RT

 

This sucks

 

Whats it looking like....got it torn down yet?

RT

 

Not everyone has these i'm thinking of making one for myself. Also the dealer can test the Techm for you

RT

 

Ok I pulled the trans and took it to a local shop for a tear down and inspection. He said I did a good job on the rebuild and didn't see anything wrong other than the burnt up 456 clutches. I asked if they could test the valve body solenoids and they said they couldn't. I'll see if a local GM dealer can this week. I might bite the bullet and get the billet 456 hub that holds the larger power glide frictions. If the valve body tests good, then I guess it needs more pressure in the tune.

 

Tune is key because I read on another forum that a guy installed the PG hub and he burnt the clutches on it with a bad tune.

RT

 

Anybody know if you can swap 6l90 parts into a 6l80? 456 hub?

 

[QUOTE=07Softail;5380128]Tune is key because I read on another forum that a guy installed the PG hub and he burnt the clutches on it with a bad tune.

RT[/QUOTE

I'm thinking about having Mike at Century Transmission put his tune in it via email. Do you know anybody that has used him?

 

Did you do the Sonnax 4-5-6 apply piston kit? Yeah I have talked to Mike about these transmissions and he should be able to tune it but I have no experience or know anybody that has.

RT

 

Alot of the parts are the same... But the 6l90 cases are longer to accomodate the extra clutches in the 4-5-6 drum and 1-2-3-4/3-5-R drum as well as the taller rear planetaries.. Although i think i read somewhere in si that the number of clutches in them are application specific, not sure if it meant 45/50 vs 80 vs 90 or if it meant that a 6l80 in certain applications could have extra clutches...