[Roadsters] 4 speed vs 5 speed

[Paul Courson]

Hi Dave,

I had a b68 1600 and the metal had the small round hole for the 4spd.
Somewhere into b69 production they made it larger.

See the Rallye website for photographs of both rubber seals that sit
beneath the shifter plate boot. Dann Bramhall also has a good discussion
and driving impressions to compare.

The power curves are different for these two engines, and the gear ratios
were matched accordingly.

I decided against the swap, realizing the lower gears would feel mismatched
to where the R16's best power developed.

Yes, having 5th on the highway would have been nice, but we have fewer long
cruises to settle in and enjoy what would have felt like "overdrive."

But its a good option if you're running open stretches often and not
interrupted by slower traffic to have to row around.

Paul
On Sep 22, 2013 2:40 AM, "Gary and Cindy Ault" <aultgc at att.net> wrote:

> Dave,
>
> Probably.  At some point, Nissan extended the opening in the top of the
> trans tunnel so it could accept either a 4-speed or a 5-speed.  Not sure
> exactly when that occurred.
>
> Another issue is the speedometer connection at the transmission.  If you
> use the same mounting for the rear trans mount for the 5-speed as with the
> 4-speed, the 90-degree adapter will not clear the side of the trans tunnel.
> A friend has an early '67 1600 with a U20 and 5-speed.  The PO who
> installed it drilled a ~1-1/2 hole in the side of the trans tunnel to allow
> the speedo cable to be connected through the passenger compartment.  I am
> told that you can make the 5-speed work by lowering the rear trans mount
> bracket so the top bolt holes in the mounting bracket align with the lower
> captive nuts in the frame.  Can't say for sure, though.
>
> Those reasons, and the fact that it will be difficult to get factory-type
> trim -- you'll need a shift surround form a '67-1/2 2000 -- that I left the
> 4-speed in my '66 1600 when I put in a U20 motor years ago.
>
> Gary
>
> ----- Original Message ----- From: "Dave" <dave at ranteer.com>
> To: "Datsun"
<datsun-roadsters at autox.team.**net<datsun-roadsters at autox.team.net>
> >
> Sent: Saturday, September 21, 2013 10:48 PM
> Subject: [Roadsters] 4 speed vs 5 speed
>
>
>  if I replace a 4 speed tranny with a 5 speed tranny in an early 67 1600,
>> Ib ve got to dig a new hole, right?  for the shift lever?
>>
>> does anyone have detailed specs on where/how to do this?
>>
>> thanks again to a great list!
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