| Re: [GMCnet] Radiator Oil & Transmission Cooler Connections [message #325732 is a reply to message #325731] |
Sat, 04 November 2017 09:58   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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This topic of the correct fitting for converting to a 3/8 line was
addressed in 1996 at International Convention.
One of the guys announced that Jim K had them. I started selling them, then
my source dried up, Gary Kener, our parts guy found the correct ones the
other month and we supply them with our 3/8 tran line kit and also sell
them separately.
For a while I would use a Die and recut the threads.
On Sat, Nov 4, 2017 at 7:29 AM, Larry wrote:
> It is important to know that there are two fittings that could fit into
> the transmission for conversion from 5/16 to 3/8 cooler line. The correct
> one
> (don't have the sizes with me right now) the correct one has straight
> threads to match with the straight threads in the trans case and utilizes a
> soft
> metal washer for sealing. The WRONG adaptor fitting has tapered pipe
> threads and is intended to match to a female tapered pipe thread hole.
> Since the
> fitting in the trans is straight, it is not a match for the tapered
> adaptor. It may seem to work when you first screw it into the transmission,
> and
> seems like it will tighten and seal, but if you force it, you run the risk
> of that the tapered adaptor will put enough force on the trans case and
> could crack the trans case. If that happens, you're screwed.
>
> Additionally, if you make the change to 3/8 with the proper straight
> adaptor, you must be careful not to over tighten it. Over tightening it
> runs the
> risk of stripping the soft aluminum in the transmission. I don't know what
> the proper torque is for that fitting. Find out before you tighten it down.
> JMHO
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
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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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