I have suggested that you send the radiator back...
I have suggested you bypass the radiator trans oil cooler totally and use an external one...
If the above is not possible...
Take the radiator and the brass original fitting to your cooler hose to
Jim Lager at Pirtek in Dallas...
3131 Irving Blvd, Suite 600
Dallas, TX 75247 (214) 631-8600
To those folk recommending he just screw in the original hard line, the first pic on the post shows high pressure hydraulic fittings as the connectors on the cooler lines....
In the past two weeks, I have ordered and have had delivered two of these radiators from legitimate suppliers...one I fitted out with the first hydraulic style fitting I recommended...the other was a direct hard line screw in...BOTH WERE PERFECT FITS....
This radiator is a hybrid for some reason....if Pirtek cant supply a fitting, you will have to run an external cooler...
