Heat treatment. There are different methods for different metals. If the metal
is too hard, it is brittle and will crack under strain.
Frequently, a part id heated to a red color and quenched in either an oil or
water bath.
I'm no expert and have forgotten much I learned way back in college.
Jim
--- On Thu, 4/1/10, ljordan704@netscape.net <ljordan704@netscape.net> wrote:
From: ljordan704@netscape.net <ljordan704@netscape.net>
Subject: Re: [Roadsters] 5 Speed Rebuild
To: gtpjimgammon@yahoo.com, datsun-roadsters@autox.team.net
Date: Thursday, April 1, 2010, 11:40 AM
How is rehardening done on the metal?
Linda
-----Original Message-----
From: Jim Gammon <gtpjimgammon@yahoo.com>
To: Datsun roadster <datsun-roadsters@autox.team.net>
Sent: Thu, Apr 1, 2010 7:08 am
Subject: Re: [Roadsters] 5 Speed Rebuild
I know a little about metal, and I hope the parts were re-hardened after
welding.
If not, they won't last long.....
Jim
--- On Thu, 4/1/10, Keith Downing <keithddowning@yahoo.com> wrote:
From: Keith Downing <keithddowning@yahoo.com>
Subject: [Roadsters] 5 Speed Rebuild
To: "Datsun E-Mail List" <datsun-roadsters@autox.team.net>
Date: Thursday, April 1, 2010, 9:26 AM
I just picked up my rebuilt 5 speed yesterday. It was rebuilt by Skip at
Miller Sports Imports in Pasadena, CA. I purchased the car in February from a
fellow on The List in Dallas and brought it back to So Cal. I was told by the
PO that the "5th gear neutral" problem was fixed back in '93. But I had the
problem while driving the car back to So Cal, so I was wondering about that.
Skip found some interesting things when he opened it up. The gear and the
press piece HAD been welded. But the welds had not been ground smooth. These
raised welds would not allow the nut to cinch down tight, so the nut backed
off anyway over the past 17 years. Make sure the welds are ground smooth.
Also, the synchro, retainer clips and all that stuff that goes back on to the
gear were non-existant. This was quite the shock to him, and had him
wondering
how it even shifted into 5th, but it did. Those parts were no longer
available, but he was able to locate some used ones, so all is well.
Now, to get it all put back in, and ready for an event filled April.
Keith
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