I bought an aerosol can of transmission flush to flush out the cooler lines in my Ranger before I put the "new" transmission in.

Well, the can says it has a 5/16" female fitting on the tube "to fit most common transmission cooler lines" but my truck has what I believe are 5/8" fittings (the tube nuts on the cooler lines were a 5/8" hex). The fitting on the can tube ALMOST threads over the flared end of the tube, but not quite (I just want it on there so stuff won't spray all over).

Went to the parts store, found an 5/8" female flare to 1/2" male flare and that was the closest I could find. I'll take it home tonight and see if it fits. They had almost nothing for a 5/16" flare.


If this doesn't work, any ideas?

 

OK, turns out the fitting I picked up is exactly what I needed. SWEET

 

If the old transmission failed, then you should replace the cooler. You will never get all the debris out of the cooler with an aerosol can. At the very least you should put an inline filter on the return line to the transmission to get all the particles out that are left in the cooler after you try to clean it out.

 

I replaced the auxiliary cooler, and put a Magnefine inline between the radiator cooler and the auxiliary, so it should be OK.