SD PCM in OBS?

joedown · Sep 10, 2012

I recall reading about putting a SD PCM in the OBS but I cannot find it. It seemed like someone was working on this awhile back but it was not completed. Anyone remember this or know if this has been successfully done yet?

Chimera · Sep 10, 2012

SD PCM will NOT work in an OBS truck. The SD IDM will work though.

joedown · Sep 10, 2012

Chimera said:
SD PCM will NOT work in an OBS truck. The SD IDM will work though.

I know it's not a direct plug in but I thought someone was working on making one work.

Tom S · Sep 10, 2012

I think Joey has it in one of his trucks. I was exploring the idea but quite playing with it when it looked like it would take a PCS or 4R100 and I already have a built trans in E4OD flavor. If I had manual trans I would have kept going.

psmike · Sep 10, 2012

the Sd pcm will work in a obs.. you need to switch some wiring around on the pins.. my calif truck is running a 49 state pcm...

BDP Tuner · Sep 10, 2012

Brian at BTS has a OBS with a SD PCM in it. When I talked to him about it before he said he took the whole harness out off a SD to do it.

PSDEng · Sep 11, 2012

Jon, are the tuning capabilities with a SD PCM, say a PMT1, that much greater than say a TDE1? Do you think the benefits are worth the time and money to switch?

superduty4x4 · Sep 11, 2012

psmike said:
the Sd pcm will work in a obs.. you need to switch some wiring around on the pins.. my calif truck is running a 49 state pcm...

That's not quite the same as putting an SD PCM in though.

Yes it can be done. You have to re-pin the PCM and if you have an auto you need the 4R100 to replace the E4OD.

JD3020 · Sep 11, 2012

Any real advantage to the PCM other than some tuning improvements?

joedown · Sep 11, 2012

superduty4x4 said:
Yes it can be done. You have to re-pin the PCM and if you have an auto you need the 4R100 to replace the E4OD.

Guess that rules me out. I just got my E40D rebuilt by John Wood a couple weeks ago.

Strokersace · Sep 11, 2012

Tom S said:
I think Joey has it in one of his trucks. I was exploring the idea but quite playing with it when it looked like it would take a PCS or 4R100 and I already have a built trans in E4OD flavor. If I had manual trans I would have kept going.

Joey did it in his 97. I've discussed it with him a bit. Said it works great but the abs light is always on and the tach has issues. I'm sure its something that can be fixed in time.

BDP Tuner said:
Brian at BTS has a OBS with a SD PCM in it. When I talked to him about it before he said he took the whole harness out off a SD to do it.

That's Cale's 95 race truck. 4r100, SD trans harness, re-pinned pcm connector, and SD pcm. All from a 2000 SD I believe.

I'm gathering parts to do this. Hopefully it'll be finished within he next year. Do I need to, no. Do I want to, YES!!

superduty4x4 · Sep 12, 2012

Strokersace said:
Joey did it in his 97. I've discussed it with him a bit. Said it works great but the abs light is always on and the tach has issues. I'm sure its something that can be fixed in time.

That's Cale's 95 race truck. 4r100, SD trans harness, re-pinned pcm connector, and SD pcm. All from a 2000 SD I believe.

I'm gathering parts to do this. Hopefully it'll be finished within he next year. Do I need to, no. Do I want to, YES!!

You, sir, are suffering from a serious case of CLSA!

Strokersace · Sep 13, 2012

superduty4x4 said:
You, sir, are suffering from a serious case of CLSA!

LOL LOL

You sir... Would be correct!!

JCart · Sep 29, 2012

What are the benefits to swapping in the SD PCM? And does this apply to an auto only?
Thanx
jrc

Strokersace · Sep 29, 2012

I'm sure that you can do it with a stick as well. Don't see why not. And actually would be easier with a stick IMO.

The main benefits are in the tuning perameters of the PCM. Fuel tables, shifting strategies for an auto, etc. The way that it was explained to me was this: The OBS tuning tables have say perameters of 1 thru 12. But they only step up every 3 perameters. So you only have techically 4 adjustment points in that total window. Whereas the SD tables have the same amount of perameters, however, a person can adjust at EVERY one instead of every 3. Giving you a full 12 adjustment points instead of 4. This allows for greater fine tuning, tweaking, and getting something absolutely perfect if you want it to. Gives greater flexibilty to customizing your setup wwhether it be shifting, idling, fueling, you name it.