Ps-2 into a scale Williams GG-1

You can do that, The sticking point will be moving stuff like the tach sensor mounting bracket.  You'll probably have to rig that on your own.  I've used some spacers and bonded it directly to the motor in a couple of locomotives.  You'll also need to get the tach tape sheet from MTH or one of the dealers.  As far as lighting, you'll be limited by the connectors that are in the RTR kit unless you buy additional connectors.  The 8 pin connector has marker lights, ditch lights, etc., and many times isn't installed in lower end locomotives.  If you want electrocouplers, you'll have to move them over as well.  You can download the PS/2 diesel upgrade kit instructions from MTH and you'll have a nice wiring diagram with most options illustrated.

Probably easier to grab the upgrade kit, it comes with all the connectors and lights for most installations.

Check Trainworld for current bargains on GG-1's..

you can get a sound file for the GG one.  The only place it was used was on the Northeast corridor.  Whether or not that sound file will give you an accurate speed when mated to Williams's gear ratio, flywheel diameter, and wheel diameter, is anyone's guess.

You should be able to tinker with the encoding strip to get close to scale speed, the Williams I've done I've been able to get them running very close to the scale speed of stock MTH PS/2 locomotives.

I have done over 20 Williams GG-1 PS-2 conversions.  A good one to do.   Do what John stated and get the upgrade kit.  You will have everything.  I am sure you can sell your diesel for more than the cost of the upgrade kit.  Use the kit and do it right.  You will be happy.

Thanks Guys:

I think I'll take your advice John and Marty. Does anyone have the diesel PS2 kit in stock they can sell me. I understand the later ones have more memory.

Regards, John

I'm waiting on MTH for one now, I don't know if anyone has them in stock.  Since I'm in the MTH-RR club, I get it for $150, so I can wait.  My Williams scale GG-1 is sitting in the corner patiently waiting for brains.

We should have them soon.  All kits from 10/11/07 have the 2X memory.