1972camarols1

Please Help
I have a 1972 camaro with a LS1 with a 4l60e trans. The 4l60 is new. It had a 6 speed in it till i swapped to the 4l60. I purchased the pigtail that plugs into the PCM and the auto trans so I could use my same computer. I have it all hooked up and for some reason when I put it in drive it feels like it's in 2nd or 3rd gear. . I have hp tuners and it says that it's always in 1st gear, even when it's in reverse. But it's not in 1st gear. Reverse works perfect. Y does the computer always say it's in 1st gear even while I'm in reverse? Is this strictly a computer tuning deal? Can someone please help me with this?

LS1MCSS

iTrader: (18)

Did you have the computer tuned for the automatic, or is it still tuned for the T56?

1972camarols1

Still for the 6 speed... But would that make it act like that?

LS1MCSS

iTrader: (18)

It has no idea what to tell the automatic to do.

1972camarols1

I gotcha. But if I pull the auto shifter all the down to 1st, should it be in first gear or would the computer still be searching? Cause when i do that the linkage is correct but it isn't actually in first gear?

the_merv

iTrader: (88)

Sounds like it's in Limp Mode..you have all the Auto wiring correct? There will be one 12v wire that will need to be powered on that Trans Harness..the rest go to the PCM..

1972camarols1

Yea it's the pink wire. I double checked all the wiring and the pink wire is hot with the key on? Could it be in limp mode because of the tune?

the_merv

iTrader: (88)

To be honest with you there reall is no set "Automatic" or "Standard" Tune..if you really wanted to you could run both Transmissions in the car and it would work..it's just a matter of what wires you have pinned on the PCM..

I'd check all the wiring again.

pdsq98gt

The PCM gets the current gear info from the pressure switch inside the trans connected to the valve body. Make sure you have 12v on the power wire to the trans or it will default to 3rd gear. Also put an auto tune in it.

1972camarols1

I've triple checked all the wires and they are all correct. The wire that supplies the power is also good. I tested it and it does have power. I even changed to a different location to get the 12v power supply and I get the same thing?