Radiator trans cooler fitting size question.

[SleeperLS]

I am looking to connect my trans cooler in line with my stock radiator cooler and have a question on what size fittings I might need. The stock radiator has 2 threaded fittings and they are both the same size. Inside of the threads measures 5/8ths. Looking to get fittings and just use braided lines for the hose connections. I am pretty poor with npt measurements. Should I get 5/8npt fittings? Or am I thinking about this wrong? Thanks for the help.

Click to read more...

 

[Turbocharged400sbc]

that should be an 18mm thread for those POS quick connects

 

[Turbocharged400sbc]

Russell-670540-Fitting-Straight-Flare-Metric-6-18mm-x-1-5-Male

Russell 670540 Russell AN Male to Metric Male Adapter Fittings

the oem uses a crush washer at the base where with these youll have to use Oring near the hex

if you had the older 5/8ths thread inverted flare fittings like on the "thick" 3.4 dohc 1st gen W's it would be better overall as the fittings seal without gaskets/oring are cheaper too

 

[SleeperLS]

Don't they sell those with some kind of oring already built in? or would it work to just buy seperate orings and throw them on around that fitting?

 

[SleeperLS]

like this. would that work?

Earl's 991956 Earl's AN to Metric Thread Adapter Fittings

 

[1quick]

Are the ones that come out of the trans the same size?

 

[SleeperLS]

No, they are different thread sizes at the trans...That was a pain in the ass to figure out and I forgot to write the damn measurements down after

I ended up using the stock return trans line fitting and used a crimp style an adapter and came off of it. Only reason is that there is a check valve built into the fitting and I didn't feel like dropping a lot of money to get one.

 

[Turbocharged400sbc]

like this. would that work?

Earl's 991956 Earl's AN to Metric Thread Adapter Fittings

thats the one i was looking for but couldnt find. its the one you need

Are the ones that come out of the trans the same size?

no i believe that is 14 and 16mm that use copper sealing wasjhers

 

[Turbocharged400sbc]

you dont need the anti drainback checkvalve if you let the engine run long enough to refill the converter before putting it in gear

 

[RICH17]

I thiught mine wre 1/4 npt on the trans

 

[SleeperLS]

Even though I let my car warm up, there have been times I have needed to move it very quickly. I wanted the insurance.

 

[Turbocharged400sbc]

I thiught mine wre 1/4 npt on the trans

team octane no need proper thredz
its only 30-60 seconds even with the converter half empty from sitting for a week

 

[1quick]

thats the one i was looking for but couldnt find. its the one you need



no i believe that is 14 and 16mm that use copper sealing wasjhers

nice those quick fittings leak all over the place, im sick of them

 

[Turbocharged400sbc]

ive never had a problem with em unless the wire E clip isnt tightened/closed up before re-installing em....they tend to open up during removal

you can replace the Oring if ya need to