I ran into a little problem with my truck...When I shift from 1st to 2nd it wants to shift near redline or I have to back off completely to let it shift. This came out of nowhere last night on the way home from my local track.

Also, when I floor it, the engine redlines immediatley instead of taking off almost as if it were being shifted into neutral.

What kind of problem am I looking at here? Torque Converter?

Thanks

 

sounds like the tranny is shot?? but thats just my uneducated guess... more will chime in shortly...

 

sounds like a internal tranny problem to me.

are you getting any codes for slipping?? (SES codes)

 

Sounds like your 2-4 band is just about toast. You said when you punch it, it red lines almost like in neutral. When this happens are still in first or second?

 

I havent gotten any codes or faults in my programmer, i just drove it again to double check. It hangs real bad in the 1st to 2nd shift. After that everything is fine...until I step on it and then it just redlines until I let off and then grabs a gear.

 

Vince... this is in any gear, it goes to downshift and just redlines.

 

Does it slip like this in reverse? What about if you shift it manually?

 

I have pretty much the same thing going on. Under normal driving 1st holds to about 4200rpm then shifts. I scanned it while driving and the 1-2 solenoid is calling for the shift, but it doesn't happen. Then when the 2-3 comes it goes straight to 3rd from 1st. But, every other gear seems fine.

I changed the solenoid, but that didn't help. I changed the drivers side solenoid, hopefully that was the right one.

 

Vince, Is the drivers side solenoid the 1-2 or did i switch the wrong one?

 

If it does it from a stop I think the band is ruled out. You also mention nothing about losing fourth. If the band were fried you'd be having more trouble getting into overdrive than into second.
I think you've got forward clutch issues. That could be from low pressure from a boost valve malfunction, pump, or maybe even fluid level. Could be also that the piston has a torn lip seal or something like that. Whatever the case, it sounds like loss of apply pressure to me.