S4 & S5 EGI Gearbox Differences ??

[shaunwil]

Trying to source an S4 EGi gearbox but I\'m struggling for info !

Is there any easy tell tale signs if the box is from a S4 or S5 Egi car ?

Has anybody got any good images showing the differences ??

Shaun

[Brett]

Should be tons of EGI boxes around!
IIRC the shaft has a different number of splints from S4 to S5...

[shaunwil]

So is the S5 EGi box 23 splines as opposed to 22 on the S4 EGI ?

Shaun

[bumpstart]

AFAIK both s4/5 "M" boxes are 22 spline,, it is the turbo "R" box that is 23 spline
in s5T ( at least for oz, jap and US markets )
the "R" box gets a new V sided multi rubber mount,, and the casting block on the rear housing for the mount reflects this

not sure if this repeated in the NA series with the "M" box
( the s5 NA are not that common here and i can recall working on genuine stock examples only twice )






but at any rate you guys in brit and europe get unusual model delination and at different years from the rest of us so that can make a little confusing
you should quote your model number to make the comparisons easier

as a brief run down for the differences -


for us in oz we have full ECU control 1986 N326 ( s4 NA manual ) N327 ( s4 NA auto )
and then the VDI intake N350 ( s5 NA manual ) N351 ( s5 NA auto ) in 1989

US don\'t get the jap/oz N318 ( s4 turbo ) but instead get a revised n332
( which curiously uses the odd leading spark location housing carried over from the n326, with turbo exhaust insert )

all US and oz market cars get AWS, and so get features such as the 4 wire 5th /reverse switch , precat , and the extra idle up solenoids ( ABSv , ASv ) , and external EGR for some models

[mpk490p]

as far as i know Shaun any efi box will do just make sure it has the vents like the one on my photo

[shaunwil]

Cheers, that makes a lot more sense. The box Ross has does has a 22 spline shaft and a vee style mount so it\'s the later spec one.

Will give the guys breaking the 1990 car to see if it\'s the same. If not then I may have that box off them.

Shaun

[shaunwil]

as far as i know Shaun any efi box will do just make sure it has the vents like the one on my photo

That could be the sign of the s4 box !

Will have a better look at the images.

Shaun

[bumpstart]

the dual vented bell housing is a feature of 12at and s4 ( and maybe s5 ) gearboxes
the V shaped casting for the multi rubber mount is an s5 trait

[mpk490p]

better shown here

[shaunwil]

Cool, so that makes the one Ross has a S5 Egi box. Can you see the vent from inside the bell housing ?

Shaun

[mpk490p]

from memory yes

[shaunwil]

I\'ll keep an eye out on the cars getting broke !

Shaun

[shaunwil]

Well to bring an old thread back to life.....................

Bought a 1987 EGI gearbox off ebay today ! Pictures all look correct. Will be fitting at the weekend with a fresh clutch (since mine feels like it isn\'t going to last much longer)

Shaun

[grinder]

sounds like a good weekend you have planned mate !

[shaunwil]

It needs to be back in one piece by Monday !

Your more than welcome if you fancy a tinker

Shaun