I have a 1200 ute that's almost finished with an a15, h150 and a 120y tailshaft. The tailshaft is a pretty snug fit. Probably only 1 or 2mm play. I took it for a drive up the street for the first time and when I got back I noticed a small patch of oil which was leaking out the back of the rear gearbox seal. I've had this same setup in another car before but not sur if the other tailshaft was shortened before I had brought it. I always thought u should have at least 10mm play. Could this b the problem. Do u normally have to shorten the 120y tailshaft with this set up??

You should typically have about 3/4 to 1 inch of play in the driveline. You may have damaged your seal.
When I put the A15 in my 2 door sedan, I didn't have to modify the tail shaft. When I moved up to the H150 120y rearend, I swapped out and used it's tail shaft with no mods. Again no mods when I moved up to the H165. Mods came after I moved up to the H190 with the Z24 motor. Now Im using a Ford 8.8 with the KA24DE motor.
So your difference is that you are working with a Ute instead of a sedan.
I wouldn't drive it until you get it figured out (shortened).

Use a stock 1200 sedan/coupe/wagon tailshaft.

EDIT: tailshaft for a 1200 won't fit an H150 rear. The rear flange is different.

1 to 2mm travel is not good and you have most likely ruined the seal. Remove and shorten the tail shaft 25mm, perhaps less depending on who's advice you consider. Or as dd suggested use an alternative shaft.

Sounds like a good combination of engine and driveline though, nice one.

Yeah I thought you should have 10-20 mm but never really thought about it cos I've used the 120y before wit no problems. Does anyone know the length of a standard 1200 tailshaft??? The 120y one I have is 1320mm.

I had an old post a few years ago with pictures and I think lengths. Will see if I can find it.

That would b great if u could find that post. Just had a look through the tec section and found its 1138mm from centre of the uni joint to the centre of the yoke joint for a standard 1200 tailshaft. The 120y one I have is 1160 so looks like a 1200 one is the go. If that info is correct it would give me my 20mm.

CORECTION: tailshaft for a 1200 won't fit an H150 rear. The rear flange is different.

For the dimensions of all stock shafts, see http://datsun1200.com/modules/mediawi ... tle=Propeller_Shaft_Swaps

I can't believe that this post has been up all day and unfamilia hasn't posted some rude wise crack yet.


C'mon mik you're slipping

Haha I've seen his "yoke" before in another tailshaft post when I was browsing. Think I'll just get it shortened rather than trying to figure out why it doesn't fit, I'll just make it fit. !! Haha. I've been quoted $190.00 to shorten and balance at a driveshaft specialist. Does that sound about right? Thought it was reasonable.