4L60 help needed

[gearmesh, inc.]

Originally Posted by 04ctd

i got a free one out back, if someone wants it

about the size of a sheet of paper, single pass.
pretty nasty looking, but price is right...was on car when i got it.

i got one out of a F-150 at LKQ, it has threaded fittings, and mounting tabs on top & bottom, so i could do it without having to weld.

which is the OUT line on my TH400?

Your out to the cooler port is the bottom one on your 400. The return to trans is the top one. A bung in your pan is fine for taking trans fluid temp. The pan is where the front pump gets its supply from to feed to all the clutch packs. The fluid that leaves the converter goes straight to the cooler to be cooled before returning to the trans to supply the lube circuits. The lube fluid that spills out the bushings and bearings just drains back to the pan.

The temp taken in the pan will be more representative of what your clutch packs see. Loose stall converters when stalled excessively can can heat up the fluid departing the converter pretty good. The fluid in the pan will be cooler than that in this situation. On a lockup converter while cruising in lockup, there is no converter slip to make heat, so your pan temp will be a little warmer than cooler out temp in this situation.