lilrobo

Stock 5.3/4l60e swap in a 55 Chevy. You can feel the car shift through all of the gears but it constantly feels like its in 1:1. If you let off of the gas at road speed, the car slows down like there's a drag. Car has a factory 3.7x gear. Getting horrible gas mileage but unfortunately there is no tach.

bbond105

Have you tried shifting it through the gears manually?

lilrobo

no but you can count ,it shifts 3 times, i do have the camero brake light switch ,for the TCC were it has 12v until you press the brake and it takes it off , that is working fine too

thanks

kaharvey88

iTrader: (9)

Could the drag be the convertor staying locked in when you let off the gas? Try light pressure on the brake just to ensure that the convertor is unlocked. How horrible is the fuel mileage?

lilrobo

well it feels like driving something with a engine (jake ) brake ,, the mileage cant tell ,, theirs not a lot of freewheeling ,ill try taping the brake while driving
thanks

bbond105

^^^^^ That’s what I’m thinking also.

lilrobo

could this be in programing ? cause when i first had it dyno he added high idel and something like this in to save on using the brakes . i had him to remove this ,, woundering if he did ?

thanks

bbond105

How is your convertor lock up solenoid wired up? Are you using the PCM to control it?

lilrobo

i dont know, i guess so .

bbond105

Try unplugging the brake light switch and take it for a test drive. If it has a lot more power on the test drive, then most likely something is wrong with the convertor lock up solenoid circuit.

lilrobo

ok i unpluged the TCC wire and drove it , i could tell something was up on low end for sure ( worse ) the top end was the same no difference , so i am going to a tranny shop and they can plug it in and check it
thanks

bbond105

I'm at a loss.

lilrobo

well like i said , when it was first tuned he added something that would hold it back, he said some people like it to help not using the brakes as much , he also added a high idle on start up , i didnt like either , so i send the ecm back to him and he was suppose to remove them i dont think he did ,i dont know were to take to a tranny shop and like them plug it in or fine a tuner and have them look at it ,, either way ill you all know what i find

thanks

kaharvey88

iTrader: (9)

Where did you unplug the TCC wire? Sounds like the transmission went into "limp mode" and was taking off in 2nd if low end power was worse

lilrobo

i did it at the brake switch, can someone verify that there is a setting like this in HP tuners is there some were i can look at what it looks like in HP tuner
2 things
high idle on start up ,, its higher than normal
and the brake hold back -or what ever its called

thanks ,

lilrobo

can someone look at HP tuner and see if there is a spot to able or disable something like this ??

bbond105

I'm sorry but I don't have any tuning soft wear, so I can't help you there.