PCM swap or flash 2001 SW2

[silverslug]

I am collecting parts for my tranny swap (Auto to Manual) on my 2001 SW2.
Up here in Canada, I simply cant find a PCM from a car with my options, only 220 SW2s were sold with stick shifts in Canada. Do I need a PCM from SW2 or will a SL2 work?

Also, I know you can get the dealer change the PCM/ reflashed for AC and cruise, what about reflashed for manual tranny? that way I wont have any possible BCM/PCM issues.

anyone done such a thing on a 3r gen sw?

[PurdueGuy]

Body style does not matter one bit - an SC2, SW2, and SL2 with the same options from the same year will have an identical PCM.

[dorisSL]

Originally Posted by PurdueGuy

Body style does not matter one bit - an SC2, SW2, and SL2 with the same options from the same year will have an identical PCM.

won't the SC2 have a higher governor?

[PurdueGuy]

Originally Posted by dorisSL

won't the SC2 have a higher governor?

Depending on the year and the factory tires, maybe, but for 99.9% of people that's not a difference that'll matter.

[silverslug]

what about Reflashing the PCM to become Manual Tranny compatible?
I am looking to avoid any pcm/bcm issues. Has anyone one done that?

[madpogue]

Originally Posted by dorisSL

won't the SC2 have a higher governor?

Speed limiter is based on tire type, not body style. The higher-speed rated tires (I forget what letter) were available on all DOHC cars. An SW2 with higher speed-rated tires from the factory will have the 124-MPH speed limiter, whereas an SC2 with the lower speed-rated tires will have the 108 (?) MPH limiter.

Body style, however, MIGHT be a factor here, in that, it being a gen-3, the PCM has to be properly mated to the BCM. Or at least the two have to be "introduced" via flashing. And the BCM is body-style specific.

[ssicarman]

Originally Posted by silverslug

what about Reflashing the PCM to become Manual Tranny compatible?
I am looking to avoid any pcm/bcm issues. Has anyone one done that?

PCM's are auto or manual transmission specific.

[silverslug]

Here is the real questions:
Does an auto to manual Tranny swap cause any electronic issues? I want the new PCM to work with the BCM just dandy and the car behave like it is stock.
Keep in mind, I have a 3rd gen, and I am not sure if this swap is so cut and dry with them.
Can A PCM out of a SL2 or SC2 donor work?
Will I need a BCM out of the donor car too?
Will a BCM out of an SC2/SL2 work with my SW2? 3rd gen SW2's are rare.
Will the PCM have to come out of a car with Cruise and AC?
Can I get my existing BCM to work with a new PCM from the donor car?

[silverslug]

I had the guys in parts do an inquiry for me: there are no Manual tansmission wagons in the junkyards in Canada. I canot get a PCM/BCM Pair.

I will have to use a PCM out of a Manual SC2 or SL2. it wll need o have cruise and AC I guess,or I will have to get it reflashed to allow AC/cruise
any other features controled by the PM I should look out for?
So, how do I reflash the BCM to work with the PCM out of the donor car? Can you even get them to work on 3rd gens? Is this a scanool thing or is this a dealer only thing?

[silverslug]

Just double checking, correct me if I am wrong.

For this project everything is straightforward except the PCM.
I need to get a PCM out of a Manual transmission sl2, sc2 or sw2
Preferably with the same options.

Considering SW2's are rare, SL2 and SC2 PCM's will suffice, Correct?

The PCM can be reprogramed for cruise, AC, etc, but not for trans type, correct? This reprograming can be done with a scan tool by a skilled technician, correct? if so, then I will not have to search as far for a compatible PCM.

The new PCM and the BCM on this third generation SW may not communicate well with eachother or work at all.
In order for this new PCM to work with the existing BCM they need to be "introduced". This is also something best left to a skilled technician, correct?

[alordofchaos]

Bumping, because your questions went unanswered over the weekend
(Caveat, no experience here, bumping your thread and guessing)

Originally Posted by silverslug

The PCM can be reprogramed for cruise, AC, etc, but not for trans type, correct?

Take a look at the attachment in this post
http://www.saturnfans.com/forums/sho...32&postcount=8

There are six programmable options, and it looks like auto is one of them.

Best bet is to call around and see if the shop that you will have do this work, can do this work

The new PCM and the BCM on this third generation SW may not communicate well with eachother or work at all.
In order for this new PCM to work with the existing BCM they need to be "introduced". This is also something best left to a skilled technician, correct?

I don't have a 3rd gen, but I think so - otherwise, on a 3rd gen, the Passlock may stop the car from running
http://www.saturnfans.com/forums/sho...d.php?t=130715

[campus189]

Originally Posted by silverslug

what about Reflashing the PCM to become Manual Tranny compatible?
I am looking to avoid any pcm/bcm issues. Has anyone one done that?

If you can open the pcm & remove the EEPROM, I don't see why not, question is is it worth the extra effort to reflash it without knowing the correct values

I have read PCM EEPROMS from my 97 SL1, & it didn't show the extra options to change it, or the default values like most do

Good luck

[Leafy]

a pcm might be able to go from auto to manual but certainly not the other way around since there is an extra board in the pcm that controls the tranny. And the PCM and BCM wont like each other until you go through the relearn sequence for Passlock/VATS. The proper procedure can be found by google.