I'm adding an auxillary spin-on filter to the tranny cooler lines. I'm going to add it to the rear line that runs to the front of the truck, not the one that comes off close to the kickdown\shift linkage and runs to the side of the engine. Which direction does the fluid flow from that line? From the tranny to the front or is this the return? I just want to install the filter in the proper orientation in regards to flow through it.

 

You willcut into the 1/2" pipe that comes from your tranny cooler mounted at the front of the truck and heads back to the tranny. To locate the correct return pipe, it will be the one that comes in towards the rear of the tranny. You will be filtering fluid after all has been through the system and all coolers. You will need 2 brass 5/8" compression to 1/2" barbed 90 degree fittings to tap intothis line. I tapped in right at the front of the truck at the bottom where that pipe turns 90 back towards the transmission. I mounted my filter housing on the 90 degree bracket that comes with the housing, and from there mounted that bracket onto a 2 1/2" exhaust clamp that is wrapped around my intercooer pipe up high right before it turns 90 into the combustion intake chamber up. The reason for this particular location is that the housing guage is protected and the changing of the filter will be effortless. Finally, connect your 5/8" hose to and from the filter housing from these pipe fittings. Now, this housing is a true bypass housing, and the guage will show you when it is time to change the filter. It will bypass only once it starts to get clogged with tranny debris. You do not have to do this next step, I chose to for added assurance. That 3/8" valve, I mounted that on top of the housing bracket and plumbed it to come from the 5/8" hose before the filter back to the 5/8" hose after the filter. You will need 2-5/8" to 5/8" to 3/8" heater hose tees for this added bypass backup. To make it easy, here are the parts:
Dieselsite tranny filter housing w/ 90 degree bracket
Dieselsite pressure guage made for this housing
1- 3/8" ball valve( 3/8" FPT x 3/8" FPT)
2- 3/8" 90 degree brass fittings(3/8" MPT to 3/8" barb)to attach to ends of ball valve
Badwin filters- your choice on amount
7' 5/8" hose, 3' 3/8"hose---all oil resistant
2- 3/4" MPT to 5/8" barb 90 degree brass fittingsto mount on in/out of filter housing
2- 1/2" compression to 5/8" barb 90 degree brass fittings to tap into 1/2" tranny return line
2- 5/8" to 5/8" to 3/8" heater hose tees
Exhaust clamp made to fit snug around your intercooer pipe-driver's side
Zip ties
Hose clamps- if you can locate them, get the Corbin style clamps,(NAPA, ACE, TRUE VALUE) the kind you squeeze with piers to get on.Much cleaner in appearance and worm style clamps tend to get loose and cut into your hose. I have yet to see a leak with these. 8-5/8" and 4 -3/8"