CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Transmission line fitting sizes

Timgoheen

Registered Member
 Premium
Joined
Feb 18, 2026
Posts
84
Reaction score
29
Location
Summerville, SC
What are the stock transmission line fitting sizes for the transmission and radiator. I need adapters for -6an
 

EVIL ENERGY 6AN Male to 1/4-inch NPSM Transmission Cooler Fitting Adapter Aluminum Fits TH350 TH400 4L60E 700R4 200-4R TR6060 AOD 4R100 4R70W C5. Radiator 1/2" 20 to 6an​

 
I was disappointed with the evil energy fittings. Fresh fittings sealed fine, but after removing and reconnecting them they leaked. Using it for fuel at 60psi. Purchased another brand that was mentioned somewhere on CK5. Cost twice as much but they sealed. Also used the evil kit for trans cooler lines, hooked those up once, no leak.
 
I haven’t heard many good reviews on EE.
Stick w Russell or Earls, also be sure to use a transmission specific fitting (1/4 x 20 NPSM) not a tapered NPT, as it could crack the case if over tightened.
 
Top Bottom