1-2 Shift Delay

[Ian Turgeon]

Newbie tuning question:

My Sy is a daily driver and running really well these days, so much so that I'm now trying to correct relatively minor nuisances like this one. Since I got the truck, it has been slow to 1-2 shift when cold. I mean the engine is wailing by the time it finally makes the first shift in the morning. After the first or second 1-2 shift, it runs great.

I'm wondering if there's an ECM parameter that controls the 1-2 shift based on operating temperature - That is, whether the computer is delaying the shift by design. If so, I'd like to be able to lower the threshold to get that first shift to occur a little closer to normal. Any help would be appreciated.
BTW I'm running near-stock (!EGR) chip.

Rob

 

[Sy229]

Ah,

That was my post, not Ian's. Apparently he clicked the "Automatically sign me on" option last time he was on my computer.

Hmm, the trouble I could get him in ... :wink:


Rob (Ian's dad)

 

[leroy]

The ecm only controls the TCC lockup. A fluid change with some Lube Guard may help.

Jim

 

[Sy229]

The ecm only controls the TCC lockup. A fluid change with some Lube Guard may help.

Jim

I changed the fluid about 10K ago. I'll give it a another go with the Lube Guard and see if that helps. Thanks for the ecm info.

Rob