| Radiator trans cooler fittings [message #246615] |
Mon, 07 April 2014 07:08  |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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With the countless hours I've spent under my coach the last few weeks, I noticed my trans lines, which had been cut and a piece of hose ran between the ends...were quite rusted and weeping fluid. The line at the radiator is 5/16 OD inverted flare? The fitting size is 5/8 ...will a 3/8 OD line 5/8 fitting seal properly or is the cone a different size? Any insight would be appreciated.
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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| Re: [GMCnet] Radiator trans cooler fittings [message #246631 is a reply to message #246615] |
Mon, 07 April 2014 08:44  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Yes , the 3/8 fitting will fit just fine.
When you connect the 3/8 lines to the transmission be sure to use straight threaded fittings with a copper washer under them. DO NOT use tapered pipe thread fittings. Some transmissions use pipe thread (which is the same threads per inch as ours) but the GMC motorhome transmission does not. Some have forced in pipe thread fittings but there is a possibility of cracking the aluminum case.
You should also run the lines along the rear bottom of the radiator to the drivers side frame , back along the frame then in toward the transmission
This allows for better support of th lines and keeps the away from the heat of the engine and exhaust.
I used steel sections of preflared 3/8 inch brake line and joined them with brass inverted flare couplers.
Emery Stora
> On Apr 7, 2014, at 6:08 AM, Sean Kidd <Seankidd@ptd.net> wrote:
>
>
>
> With the countless hours I've spent under my coach the last few weeks, I noticed my trans lines, which had been cut and a piece of hose ran between the ends...were quite rusted and weeping fluid. The line at the radiator is 5/16 OD inverted flare? The fitting size is 5/8 ...will a 3/8 OD line 5/8 fitting seal properly or is the cone a different size? Any insight would be appreciated.
> --
> Sean and Stephanie
> 73 Ex-CanyonLands 26' #317 "Oliver"
> Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, Huber TB (soon), 3.70:1 LSD
>
> Colonial Travelers
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> GMCnet mailing list
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| Re: [GMCnet] Radiator trans cooler fittings [message #246637 is a reply to message #246631] |
Mon, 07 April 2014 09:08 |
Jp Benson
Messages: 649
Registered: October 2011
Location: Fla
Karma: 2
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Don't the trans cooler lines also ground the radiator?
JP
On 4/7/2014 9:44 AM, Emery Stora wrote:
> Yes , the 3/8 fitting will fit just fine.
>
> When you connect the 3/8 lines to the transmission be sure to use straight threaded fittings with a copper washer under them. DO NOT use tapered pipe thread fittings. Some transmissions use pipe thread (which is the same threads per inch as ours) but the GMC motorhome transmission does not. Some have forced in pipe thread fittings but there is a possibility of cracking the aluminum case.
>
> You should also run the lines along the rear bottom of the radiator to the drivers side frame , back along the frame then in toward the transmission
>
> This allows for better support of th lines and keeps the away from the heat of the engine and exhaust.
>
> I used steel sections of preflared 3/8 inch brake line and joined them with brass inverted flare couplers.
>
> Emery Stora
>
>> On Apr 7, 2014, at 6:08 AM, Sean Kidd <Seankidd@ptd.net> wrote:
>>
>>
>>
>> With the countless hours I've spent under my coach the last few weeks, I noticed my trans lines, which had been cut and a piece of hose ran between the ends...were quite rusted and weeping fluid. The line at the radiator is 5/16 OD inverted flare? The fitting size is 5/8 ...will a 3/8 OD line 5/8 fitting seal properly or is the cone a different size? Any insight would be appreciated.
>> --
>> Sean and Stephanie
>> 73 Ex-CanyonLands 26' #317 "Oliver"
>> Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, Huber TB (soon), 3.70:1 LSD
>>
>> Colonial Travelers
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Radiator trans cooler fittings [message #246639 is a reply to message #246633] |
Mon, 07 April 2014 09:55 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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I suspect that Manny Trovao has some on hand.
Emery Stora
> On Apr 7, 2014, at 8:00 AM, Sean Kidd <Seankidd@ptd.net> wrote:
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>
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> Thank you Emory, I cannot find the NPS fittings for the trans anywhere...any suggestions?
> --
> Sean and Stephanie
> 73 Ex-CanyonLands 26' #317 "Oliver"
> Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, Huber TB (soon), 3.70:1 LSD
>
> Colonial Travelers
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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