| Re: [GMCnet] Radiator Oil & Transmission Cooler Connections [message #325725 is a reply to message #325724] |
Fri, 03 November 2017 23:26   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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We supply the 3/8Brass fitting for the trans with correct thread.
On Fri, Nov 3, 2017 at 9:07 PM, Gary Kosier wrote:
> Ken,
>
> I think you'll find those fittings in the transmission are 1/4" straight
> pipe thread.
> The reason for the odd sized fitting at the radiator cooler is because GM
> used
> 3/8" cooler lines up through 1972. When they dropped to 5/16", it was easy
> enough to use the correct fittings at the transmission, but it would have
> cost
> money to retool the cooler in the radiator. And, of course, if it turned
> out that
> they had made a mistake, it would have cost even more to go back. Funny!
>
> Gary Kosier
> 77PB w/500Cad
> Newark, Ohio
>
> --------------------------------------------------
> From: "Ken Henderson"
> Sent: Friday, November 03, 2017 8:43 PM
> To: "GMC Mail List"
> Subject: Re: [GMCnet] Radiator Oil & Transmission Cooler Connections
>
>
> 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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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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