GGSX auto trans reliability and upgrade questions

[TurboTony]

I know this isn't really a n00b question per se', but I am only allowed to post here. Onward, I am the new owner of a 1991 Galant GSX awd, n/t with an auto trans. I've been hunting for a while for this and was happy to have finally acquired it. I am assembling a turbo motor for it while I collect all of the other misc parts (5-lug swap, suspension, etc).

One thing that has me concerned is the stock auto transmission. There appears to be a lack of authoritative threads on just how much awhp this thing can safely/reliably handle. I've searched everywhere for info on the W4a321 trans, even google, all to no avail.

I am specifically looking for the following:
1. Actual whp threshold
2. Shift kit and end clutch pack upgrades
3. Plug and play, direct fit dsm alternative(s), model year.

I know I could just email John at IPT directly, but that doesn't benefit the community, and I have benefited greatly from the information here in the past.

Thank in advance for any help and info

Tony<~n00b

 

[eazy2g]

if you email John and post the results it could help

I seen 1g w/ auto run low 11s not sure about the actual hp though. But it would be what ever gets you there, i guess..

 

[TurboTony]

Thanks. Yes, I've done this all before on a couple automatic 1g DSM's, but never on a automatic Galant GSX. No surprise since they are so rare.

John wrote back and confirmed that the shift kit and end clutch upgrades are compatible, so that's the good news.

The bad news is that I may well be the first guy to attempt to make decent power on the stock awd n/t auto trans. There is simply nobody out there posting about their experiences with the stock GGSX auto trans withstanding the abuse of a turbo 4g63 powerplant. In a few weeks I will need to decide which turbo to install. I have an old 14b and a new E316g.

This will be a simple street car running on a 2g mas and 550's with a proper fmic and fuel system upgrade and fine tuned by an afc.

Hard to believe that after 20 years of DSM's in America there is actually something new to experiment with. Here goes