I have 1992 B2200 AT. A few years back I bought a replacement radiator, but the AT oil cooler inlet/outlet fittings were smaller (7.5mm) than the transmission tubing (10.5mm)
So I had to use line reducers to make a good fitment. But I also ran into issues and had to change the hoses every 2 years because of leaks, im sick of it.

I am thinking of buying an external oil cooler, but cannot find any information on which tubing is the inlet/outlet from the transmission side. Basically there is a driver side and passenger side tubing. I did not have any luck reviewing the service manual that I have, it does not differentiate between inlet/outlet.
Common sense would tell me to set up the cooler in the same manner the lines are currently running. But the aftermarket oil cooler does have directional flow.

Does anyone know the inlet/outlet tubing on the transmission side?

thanks

 

You could disconnect one of the transmission hoses at the radiator, disconnect the coil wire so the engine won't start, then watch to see where the trans fluid comes out as the engine is cranked over by a helper.......depending on whether the fluid comes out of the disconnected hose, or the radiator oil cooler fitting, you will know then which line is the outlet line from the trans. Might make a slight mess but you could plan for that to keep it at a minimum.

Let us know also! Thanks.

 

good idea, makes sense.

Will report back once its in.

Thanks!

 

Are you using correct hose for ATF? There are different rubber formulations for rubber for ATF, gasoline, oil, coolant, brake fluid, power steering etc.

 

Yes I have used ATF hose. The issues have been getting everything sealed up nicely. Because of the reducers I had to use, Each connection has 4 clamps all prone to leaks.
Then I learned not to use the hose clamps with the worm gear because over time, I’d re-tighten the clamps and eventually they’d bite into the hose and start leaking.
I know use the more solid fuel hose clamps which afe much better.
I wish I could source metrix ATF hose, but since I am getting this ATF cooler kit, I will start with whatever they supply, I believe 3/8 ATF hose.

 

I was able to successfully put in the oil cooler. I purchased a Hayden 677 Rapid-cool oil cooler from amazon ($38). The description said it had 3/8 fittings, but it was closer to 11/32. I was able to achieve what I wanted and make the connection without using reducers. The 11/32 hose was a tight fight on the transmission side but it worked after gently heating it up the hose.

One clever way to figure out which is the inlet vs outlet was running the car cold for a minute, then checking which hose is cooler or hotter. Hotter would be the inlet, cooler would be the outlet. I used a temperature gun and it was pretty obvious, 20 degree difference.

I mounted my oil cooler to the front of the radiator. I used 1/16th aluminum to brace it in place. I also used the the radiator mounting screws as my achoring points. So far so good. Now hopefully no more leaks!