Transmission Switches

[AlfaNeely@domain.elided]

       Well, once again I have been proven wrong.  The only switch on the 
transmission of the Bosch spiders I have been messing with is the back up 
light switch.  However, I searched out a 74 transmission I have laying around 
here and it does indeed have some wires hanging out the left side of the 
shifter tower.  So I apologize for my error.
       Just what years of Alfa came with the interlock?  None of my 1600 nor 
1750 transmissions have this.  My 82, 84, 87 and 91's do not have it.  Both 
my 1974 transmissions do have it.  So I guess that was a bad idea Alfa had 
for only a few years in the 1970's.

Ciao,
Russ Neely
Oklahoma City


In a message dated 05/03/2002 7:45:12 PM Central Daylight Time, 
owner-alfa-digest@domain.elided writes:


> 
> Date: Fri, 03 May 2002 17:45:28 -0400
> From: "Dean W. Cains" <dwc@domain.elided>
> Subject: Re:Re: tranny question
> 
> There are two switches in that transmission.  The one you asked about, in 
> the shifter assembly, is tied into the seatbelt/ignition interlock 
> unit.  Starting in '74, the seatbelts had to be fastened, with the 
> transmission in neutral, when starting the car.  The interlock unit sits 
> inside the cockpit, under the glovebox, and those cars also had a starter 
> relay that earlier 115's didn't have.  So, your gearbox is likely a '74 or 
> later version.  The switch can be left unconnected without causing any 
> trouble, as can the "Butt sensors" in the lower seat cushions.  I can't 
> tell you when that interlock system changed or was discontinued.
> 
> The other switch, in the bellhousing, closes when reverse gear is selected, 
> and operates the backup lights.  The earlier (pre-'72) transmissions had 
> that switch mounted in a bracket that was held in the bellhousing with two 
> screws.  Your later transmission has that switch threaded directly into the 
> bellhousing.
> 
> Regards,
> 
> Dean W. Cains
> Lutz, FL
> '74 Spider Veloce
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