second gear start when cold

[z-ya]

I'm starting to get ocational second gear starts when cold, seems to go away when warm . This is on a 200 4r behind a ls1
in a 2001 camaro . I'm useing mobil 424 tractor fluid in a century built trans . Any idea what the cause is ?
Thanks
Mark

 

[77 cruiser]

Minimum line press. too high. Can you check it?

 

[SSedan64]

A little Info at bottom of Pg. here >> Extreme Automatics Where winning is easy

 

[z-ya]

Yes I have a pressure gauge in the car i'm seeing about 105 psi in 4th gear detent . This is at idle .
Mark