New From NW GA With a 1990 K5

[1990K5]

Thanks for the heads up Pl4yboy. I will definitely give that sticky a thorough read. You are correct about the current setup. It is a 350/700R4/241C combo. I was under the impression that in the 1990 models, the t-case had a 32 spline input, which I believe is what the 4L80E has, but I haven't looked that far into it. Depending upon how much cash I have in-hand when I get that far, if the 241C has the correct spline count, I may reuse it. If not, and money permits, I may go with the modified TH400 adapter from Advance Adapters and bolt an NP205 up. With that comes extra machining to fit a tone ring for the speedometer (I think. Someone may correct me on that, as the 4L80E may send the speed signal, rather than from the t-case as it currently is with the DRAC/VSS.

As for harnesses, from everything I've been able to read so far, it looks like Nelsons and a few others are the most highly recommended. No reason to argue with that, so I'm sure I'll go that route.

Thanks again for the information.

[pl4yboy]

I'm not sure on the t-case spline count, so I can't help there. Just thought I'd throw it out there before you ran into the issue at a critical moment in the swap and stuck without funds or time. I've been there! Nelson and Painless both make great harnesses, but remember, they are simply stand alone to get it running. No gauges or anything else. That's on you.