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Re: [GMCnet] Radiator Oil & Transmission Cooler Connections [message #325723 is a reply to message #325706] Fri, 03 November 2017 19:43 Go to previous messageGo to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Rob,

IIRC, the OEM transmission line is 5/16", but, as Jim K says, with a weird
nut at the cooler -- because the cooler fitting is 3/8". That's what
allows us to replace the OEM 5/16" lines with 3/8" by changing the fitting
at the transmission from 5/16" inverted flare x 3/8' straight thread to
3/8" inverted flare x 3/8" straight thread

​Manny delivers the unusual 3/8" inverted flare x 3​/8" straight thread
adapter with his TH425 rebuilds.

Ken H.


On Fri, Nov 3, 2017 at 3:36 PM, Rob Mueller wrote:

> G'day,
>
> I want to double check the connections to the oil and transmission coolers
> in the radiator, IIRC the oil cooler is 1/2 inch inverted
> flare and the transmission cooler is 3/8 inch inverted flare or is it 5/16
> inch inverted flare?
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
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