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Old 05-22-2013, 07:39 PM   #8
clinebarger
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Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: What are you guys doing on your tranny cooling lines?

Quote:
Originally Posted by jks67ss396 View Post
Guys

I keep bringing up these old threads..

I like what Clinebarger said about using the old th350 fittings in the new 4l60s for the trans cooler lines.

Seems like the 4l60s want 3/8s lines and the older trans' were happy with 5/16 lines.

With using the older TH350 adapters and a 1/2"-20 fitting, will a 5/16 line be ok for the 4l60?

Or is it possible to get a 1/2"-20 fitting on a 3/8ths line?

Ultimately, id rather just bend my own poly armour lines with a 37 degree flare to mount up the the -6 fittings i have (was gonna use them in the camaro), but im still trying to figure out if i can flare poly armour with 37 AN single flares...

thanks guys!
5/16" line work well on ALL GM auto's. The cooler line fitting threads in the case are 1/4" NPSM.....The I.D. of the fittings are 1/4", So going with bigger line does no good.
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