69 1/2 Six PAck Bee

Hi all,
My '90 has an A340H and I have recently begun to get a delayed 1-2 upshift when I first start off in the morning.
(50degrees/F)
Last time it was doing this I changed out the fluid and it was okay. The trans shifts great after a few blocks and stays that way regardless of engine/trans temp. I again changed out the fluid but this time to no avail.
I am thinking the 1-2 upshift spool is sticking and maybe the solenoid coil is on it's way out yet I get no "code" when I diagnose it.
What do you think?
If it is the solenoid which one is it?
Thanx,
Bud

kt19

Try an additive before you get to far in. I like Trans X, it has always helped out every tranny I have put it in and I continue to put it in whenever I service a tranny. good luck

69 1/2 Six PAck Bee

I put in a pint of Lucas when I changed the fluid..

kt19

You may need to dig into it then. Search the forum there are alot on the transmission selinoids and i think you will find what you need.