72 c10 ls swap

[mxerhale]

4L80E fit right in my low hump 1971. I have 2 friends that have blown up 4L60Es with stock engines and I had no desire to do everything twice.

[MARKDTN]

Originally Posted by mxerhale

4L80E fit right in my low hump 1971. I have 2 friends that have blown up 4L60Es with stock engines and I had no desire to do everything twice.

I must be really lucky-and they may all die tomorrow-but I have had good luck with both 700R4 and 4L60E.

In my '83 K20 with 350 the original weak 700R4 went 80K pulling trailers a lot before the pump died. Then I got a GM reman with improved pump and torque converter.

Had a '95 Suburban with 350/4L60E that was at 212K when we sold it with never a problem. It pulled a lot of trailers too.

Had an '01 Tahoe that went 299K on the 5.3/4L60E again lots of towing and never a problem. In fact at about 250K the radiator cracked and the replacement had a weeping oil cooler line fitting. It parked on grass and I didn't see the leak. One day it was slipping bad. Fluid was low and black and did not smell nice. I fixed the leak and changed the filter thinking it was done but it went another almost 50K with no issues until 4th gear died. Put a GM reman in it and it sold at 330K.

Then an '07 Tahoe with 5.3 that has at least 220K now that I gave to my son. Yes towing. No issues.

The only one I had that really gave trouble was a '97 4.3 Blazer. It died at around 130K. I have known of others with the Blazers that had early issues too.

I'm not sure you can control a 4L80E with a 4.8 stock computer anyway?