Jbabycsx

This is my first post here, glad to be part of a great site!

I just started swapping an LS1 and TH350 into my 86 Silverado. I have the engine and trans at my shop and I am waiting on the parts I ordered to be shipped. The LS1 is out of an 01 Camaro that was originally equiped with a Tremec T-56.

I have already purchased the flexplate, bolts as well as the in line fuel pump, regulator. I went with Schoenfeld headers for the exhaust and Dirty Dingo for the engine mounts.

My question is on the engine/tranny combo. Will the ECU(being from a manual shift car) need to be programmed because of a different tranny? I would think that a manual shift ECU would not control or monitor any type of transmission data. Any information will be a big help!

LS1MCSS

iTrader: (18)

The pcm does get one reading from the tranny. That's a VSS signal so it know when the vehicle is moving and how fast it's going. Because of that, you're going to need a VSS so the pcm knows when the truck is moving. Without it you will have issues with the engine trying to stall out occasionally when you're coming to a stop. There are a few different vendors that sell an aftermarket VSS that goes inline with the speedo cable.

Jbabycsx

Thanks for the info. I will check into that. This swap is adding up reeeealy quick!

psiconversion

iTrader: (5)

As LS1 pointed out, you should probably hook up the VSS. One way to do this is use a 4L60E reluctor wheel and tailshaft housing. There are companies out there that sell them. We used that exact setup on our shop Nova. Another option may be to use a signal generator that threads onto your stock mechanical output from the TH350. It has 2 wires which will generate a pulse signal to feed the PCM.

Jon
PSI

veltboy618

Jon will a regular speedo sending unit from Dakota digital work with the PCM?

psiconversion

iTrader: (5)

I believe it will as long as the PPM is correct in the tune. I haven't tried it.

Jon
PSI

theirongiraffe

Kind of an old thread, but is the op staying with efi? I'm planning a swap into my cutlass was curious which route he took. I'm debating carb over efi just because I have a lot of parts for a garb car.