Dewey, you read right. It's the backing plates that are different
thicknesses:
5 speed: 0.18 in
4 speed: 0.8 - 0.9
Check out these links for more discussion:
<http://www.311s.org/pmwiki-311/pmwiki.php?n=TechSection.4SpeedTo5SpeedSwap>
<http://www.311s.org/phpBB2/viewtopic.php?t=7274>
<http://www.311s.org/phpBB2/viewtopic.php?t=2749>
<http://www.311s.org/phpBB2/viewtopic.php?t=190>
Cheers.
Pete "your friendly Search the Archives Elf"
-----Original Message-----
From: datsun-roadsters-bounces+ppeters914=comcast.net@autox.team.net
[mailto:datsun-roadsters-bounces+ppeters914=comcast.net@autox.team.net] On
Behalf Of Gary and Cindy Ault
Sent: Wednesday, March 19, 2008 9:37 PM
To: Dewey Hahlbohm; Datsun List
Subject: Re: [Roadsters] Bell housing front cover question
Dewey,
I don't know what the rest of the list will say, but I have a '66 1600 with
at '69 U20. The 1600 and 2000 share a common block casting. The 4-speed
bolted right up to the U20. I am not aware of any special measures which
should be taken to fit a 4-speed to a U20, or a 5-speed to a 1600.
Gary Ault
----- Original Message -----
From: "Dewey Hahlbohm" <hahlbohmd@earthlink.net>
To: "Datsun List" <datsun-roadsters@autox.team.net>
Sent: Wednesday, March 19, 2008 7:49 PM
Subject: [Roadsters] Bell housing front cover question
> Hi all, I am planning to put a 4 speed tranny behind my 2000 engine for
> improved gearing for autocross. I have read you must use the correct bell
> housing front cover, for the tranny you are using, if you swap trannies on
> the 1600 or 2000 engine. Does anyone have the thickness measurements of
> the different front covers for the 4 speed and 5 speed trannies?
>
> I recall reading something about different thickness front covers cause
> increased stresses on the throwout or transmission bearings. Does anyone
> know the specifics about that, or any other reasons for being careful with
> the front covers?
>
> TIA, Dewey Hahlbohm
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