98 WS6

iTrader: (20)

Hey everyone

Searched but couldn't find an answer. I plan on doing an LS swap in my '73 Camaro, and mounting my Th350 to the LS until I get bored of it and save up for a T56. My thinking was, get a manual PCM so there is no electronic transmission control, then I can swap from the Th-350 to T56 without having to touch the computer.

HOWEVER, if the 5.3 PCM is different than the 5.7 PCM, then I can't do it, correct? Since all the 5.3's are electronic controlled auto tranny PCM's. Or does it not matter at all, and the auto tranny controls can just be tuned out? Regardless, a 4L60E will not be in the car.

Any help is much appreciated, thanks!

2xLS1

iTrader: (25)

That is a very broad question. Some are, some aren't. Would help to know what year and model wiring harness you plan to use. If you use a 99-02 F-body harness then I would suggest getting a 12200411 pcm from any vehicle that used it and get it flashed with a 01 or 02 F-body M6 calibration. Any competent tuner can do it. You are going to have to get it edited anyway to get it to work in a transplant. Vats, emissions deleted etc.

98 WS6

iTrader: (20)

Sorry about that, not too sure about the PCM's. I don't intend on using a specific year, just whatever works really. As I said I plan on putting in a 5.3

So is the auto/M6 difference merely just a calibration, not an actual different computer? Would a 99-02 F-body PCM work for a 5.3?

2xLS1

iTrader: (25)

When you said you were doing a LS swap I figured you meant LS1. 99-00 F-bodies and trucks use the same PCM and 01-02 F-bodies and trucks use the same PCM, just different calibrations inside. And you can generally mix and match any calibration with any of those 2 PCMs. 03-07 classic 5.3s can be run with older PCMs. Type of throttle body can have an effect on what PCM and calibration you need. You should decide on a year and wiring harness before you pick a PCM. Big difference between 07 classic and older 5.3s and 07 and newer 5.3s. Harnesses and PCMs.

98 WS6

iTrader: (20)

I definitely want a mechanical TB, not drive by wire. So lets say I pick up a 5.3 from a 2002 truck. From what you're telling me, I can use any pcm from 99-02? Regardless if it's from a manual or auto car?

Thanks for your help sir.

LSX Power Tuning

iTrader: (4)

You need a 896 or 411 pcm for what you're wanting to do. We keep them instock if you need one.

98 WS6

iTrader: (20)

Alright cool, thanks! I'm not ready quite yet but when the time comes I'll keep you guys in mind.

mrvedit

The key issue is whether the engine has a 24x or 58x reluctor on the crankshaft.
The suggested 411 PCM only works with 24x. Every GM PCM only works with either 24x or 58x, never both.

Correct me if I am wrong, but as far as I know:
* All LS1 are 24x
* Early LS2 are 24x
* Late LS2 are 58x
* All LS3 are 58x
* All 58x GM PCM are drive-by-wire; they don't have support for an IAC.
* Many 24x PCM support both drive-by-wire and drive-by-cable.

If you insist on drive-by-cable, you need to use a 24x PCM or an aftermarket PCM.
A 58x LS2 or LS3 can be converted to 24x but it involves a major engine disassembly to remove the crankshaft.

98 WS6

iTrader: (20)

Thank you for that! I saw a mention of this on NastyZ28, but didn't know what they were talking about exactly. So then a regular F-Body PCM should work perfectly. Here's my remaining question:

Should I just grab one from an auto car? My thinking is this.. Currently I want to retain my TH350 for now. So, tune out the automatic transmission controls when I get the PCM tuned. Then, if I want to go T56, that's already done and I can slap the T56 right in, correct? Also, if for any reason I want to go 4L60E I can just retune the PCM for the auto trans.

Is this correct?

mrvedit

There were several F-body PCMs. The '98 is an odd-ball and you want to avoid that because it has a unique harness connector pinout.
You simply want the "411" which IIRC was used in '99 through '02 F-body and a bunch of other cars.
You might consider buying the 411 from ebay seller "spareecm". I just bought another one from them for a project and the price was $89 including having it "tuned" for A4 or M6, Vats on/off and any desired VIN. Yes, if you select one for M6, it should work fine from your TH350 and later for your T56. You may have to disable a few codes for the TH350; the spareecm guy might know if that is needed and do it for you.
I suspect some sponsors here can sell you a 411 for a similar price.

LSX Power Tuning

iTrader: (4)

You can flash the pcm to auto or manual. If your running a th350 it needs to be flashed as a manual.

98 WS6

iTrader: (20)

Awesome! You guys rule, thank you very much!

rpturbo

iTrader: (47)

Since you haven't done it yet, I also recommend getting a 01 or 02, just because it has the newer os in it. Think of it in the way of Windows 2000 vs Windows XP. Both do almost exactly the same thing, but the newer os, gives you a few more options.

LSX Power Tuning

iTrader: (4)

You can flash a 896/411 pcm to any year from 99-02 the year of the pcm doesnt matter as long as its a 896/411.

rpturbo

iTrader: (47)

Thanks for saying that. I knew it "can be done" but wasn't sure how that all works as far as HPT, vs EFI Live vs Tunercat. It seems like everything I need/want to do in HPT, it's 2 credits. I have the new Beta version with segment swap, but to "upgrade" the OS, I haven't seen anything on that.

2xLS1

iTrader: (25)

Upgrading the OS is not the same as changing the year/model OS in the PCM.