Maineiacer

The blazer 4.3 4x4 shifts fine through all gears. But going up a hill it boggs down and will shift down to next lowest gear when it gets to 1st gear I have to pull over. If I turn it off and re start I can drive until it goes through this cycle of down shifting to 1st. All the time I'm climbing the hill the rpm's are up at 2 thousand, feels like I'm pulling a house behind me going up hills. Was running great on flat road now at around 40-50now it's starting to hesitate like the fuel pump is going bad but it was replaced 1-2 years a go. Did a scan and came up with a code for a bad shift solenoid . It shifts just as smooth as can be. I also had the transmission rebuilt 3 years a go. I'm at my wits end. Has new plugs, wires, distrbuter, Any help or suggestions would be greatly appreciated. Thanks too all in advance.
just added new fuel filter, catalytic converter, mass airflow sensor, I didn't mention even with gas pedal to the floor the rpm's never go above 2000-2200 to the floor is 2000 lift up on pedal just a bit and it will rise to 2200.

kevinkpk

Rings?

Maineiacer

There's no smoke out the exhaust or any loss of fluids. No sign of antifreeze in the Oil. The scanner has a shift solenoid code showing but it shifts fine up and down just no power. I really don't know where to look next. I'll ask my mechanic about the rings. Thanks for the reply.

therewolf

Sounds like a bad shift solenoid to me. Was it taking hills just fine, up until just now?

Maineiacer

It gradually got worse over time now it bogs down even on flat ground. But shifts fine up and down every gear smooth as silk.
would I be missing any gear with a bad solenoid??. Thanks for helping I appreciate it.