[Diy_efi] 88 Grand Prix

[Ben P]

i dont know anything about the buicks, but as a general rule, at least two 
of those wires will be gear selector indicator, one will be a neutral/park 
starter lockout, and one will activate the reverse lights. Once you find out 
which wire is which, the lockout can either be connected to the manual (see 
below) or bridged to give you an option if the the engine dies in the middle 
of a train crossing.

There may also be an electronic speedo signal wire (or two) connected to a 
'bolt-on'part of the gearbox. If this is present (and there is no speedo 
cable, not to be confused with a kickdown cable, which sometimes are 
attached in wierd spots), the same unit, or a similar one, should be present 
on the manual gearbox. swapping the auto one over to the manual gearbox 
should result in a working speedo (that is also correct if the diff ratio is 
unchanged)

The other two wires on the manual gearbox may be neutral starter lockout 
(yes, some manuals have them) and a reverse light switch.

Re. the rest of the conversion, check to see that the gearboxes are the same 
length and have the same output spline. If they are (which is likely if the 
gearbox you are using was available in the buick grand prix) then you wont 
need a tailshaft, and as an added bonus, if the gearbox was available in the 
buick, the gearbox crossmember (or at the very least the holes in the body 
that it bolt to) should be the same.

happy conversion
Ben

(I'm going by what I need to do to my car to convert it to manual, except I 
have 17 wires apart from the gear selector, lockouts, and speedo. bloody 
electronic gearboxes need to know how hot your @$$ is before it gets out of 
limp home mode...




>From: "John Bee" <johnnybee8 at hotmail.com>
>Reply-To: diy_efi at diy-efi.org
>To: diy_efi at diy-efi.org
>Subject: [Diy_efi] 88 Grand Prix
>Date: Sat, 30 Sep 2006 10:24:35 -0700
>
>Hello All
>LOoking for some advice. I am replacing the automatic tranny with a 5 speed 
>manual in a 88 Grand Prix. The car is using a 1227727 ECU and the 5 speed 
>is out of a 88 celebrity sw. The automatic has a 7 pin connector and a 2 
>pin connector coming out of it, the wiring diagram I have only shows 5 
>wires, 4 of which go to the ECU and one is power. The 5 speed only have 2 
>2pin connectors. I have no idea what the gear ratio of both transaxles are 
>but both cars have the same engine (2.8 L) and wheel size. Does Anybody 
>know what these wires are and or what I need to do to get this convertion 
>to work?
>Thanks in advance!
>John B.
>
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