'82 Corvette ECM 1225550 swap to '84 Corvette ECM 1226430

**GS023** · 05-07-19, 03:33 PM

Looking at trying this on an 82 CE, having other issues and looking at a less expensive route. From what I read I must have the 84 AT prom. If I find a complete AT unit with the stock 84 prom am I good to go?

Thanks

**jrustaeus** · 05-07-19, 11:57 PM

Originally Posted by GS023

Looking at trying this on an 82 CE, having other issues and looking at a less expensive route. From what I read I must have the 84 AT prom. If I find a complete AT unit with the stock 84 prom am I good to go?

Thanks

Yes, you need both the ECM and the chip from 84, for automatic the ECM is 1226026. The electrical connectors is just to plug in. The 84 ECM is smaller than the 82, and you need to attach it in some clever way. I used zip ties as a temporary solution (I need to change that some day).

**clifhar** · 08-08-19, 07:50 PM

Cliff is a new member to this forum so I might post wrong!

I am at a crossroads as how to revive my stock '82 with a burned 1225550 ECM and burned white 24 pin female connector. This thread highly recommends upgrading to an '84 1226026 ECM with auto trans EPROM. I read that this upgrade is a plug and play swap so I am very interested. My first problem is replacing the connector that has four unrepareable pins. Can anyone tell me where to find a new/used replacement connector and '84 ECM WITH auto EPROM and follow up advice on the upgrade?
Thanks,
Cliff H.