[Roadsters] 5 Speed Rebuild

[Hall, Phillip B. (MSFC-ED10)]

I would assume the gears are case hardened for tooth durability/fracture
resistance.  If that is true then the heat effected zone from a good weld
should be localized and not effect the hardness.   I have not done hardness
testing on a Roadster gear to verify this.

Phil
SEROC


On 4/1/10 10:40 AM, "Linda Jordan" <ljordan704 at netscape.net> wrote:

How is rehardening done on the metal?

Linda








-----Original Message-----
From: Jim Gammon <gtpjimgammon at yahoo.com>
To: Datsun roadster <datsun-roadsters at 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 at yahoo.com> wrote:


From: Keith Downing <keithddowning at yahoo.com>
Subject: [Roadsters] 5 Speed Rebuild
To: "Datsun E-Mail List" <datsun-roadsters at 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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