1275 S Transmission case

[timo]

Hello

I am getting all the bits together for my '66 S, I have 3 transmission casings, one with no breather boss, one with the boss but not drilled and one with the boss drilled. I am pretty sure it is not the last one, but should there be a boss or not. Can't quite see in the Parnell book.

Many thanks
Mike

[pdaykin]

I believe that it should be the one with no breather boss.

However, I have a factory replacement power unit fitted to a 67 and it has the drilled one in it.

Not 100% sure when the replacement was purchased - I think it was 71

[timo]

That would make sense, I had a '72 GT and that had the beather.

This is an interesting dilema between originality and practicality. I know from my Frogeye that poor breathing causes oil to escape through the crank seals, however I plan to fit the original device to the manifold to aid the breathing with the vacuum so will probably go with the 'no boss' option

Thanks for your response

[ricardo]

There are 2 types of clutch housings with no breather. Yours should be like this one:

http://i1212.photobucket.com/albums/cc4 ... CN0093.jpg

http://i1212.photobucket.com/albums/cc4 ... CN0096.jpg



The other type has a 'flat' top with a thick ribbon, like this one:

http://i1212.photobucket.com/albums/cc4 ... _00146.jpg

[timo]

Excellent, thanks ricardo, I will dig mine out and take a look

[251 ENG]

The first 1275,s have a transmission case that is matched to the 333 gearbox and normally has an AEG part number stamped on it by the starter motor .

[timo]

Thanks

Does that mean that only those transmission cases can be used with a 333 casing? Also I have a straight cut box which is not in a 333 casing and I still haven't decided which one to use, so the other part of the question is, can the early transmission case be used on a non-333 casing

Cheers

Mike

[1071 S]

The only "real" difference between transfer cases (ie that determine their interoperability) is the idler bearing size. Of course "correctness' is another issue all together.

Cheers, Ian

[ivor badger]

There is the advantage in the later case with the much improved oil feed to the idler bearing.