A-727 swap to 360 what trans fluid recommendation.

[72polarbear]

finally ready to put fluid in my freshly installed 727 rebuilt nearly stock so just wondering what you guys would recommend and what’s the procedure to start up. Thanks

 

[bronze turbine]

MoPar ATF +4 would be the best ATF to use.

 

[1970FuryConv]

finally ready to put fluid in my freshly installed 727 rebuilt nearly stock so just wondering what you guys would recommend and what’s the procedure to start up. Thanks

Dexron 3 was factory recommended in 1972. I have used Dexron 3 with good performance in a 1968 727 that I rebuilt. It's behind a 1969 440.
You will pay more for ATF+4, although it's fine for your car.

 

[MoPar~Man]

Viscosity loss (20 hour KRL Shear test) Dexron-3 40%, ATF+4 10%. Dexron-3 = garbage.