Transmission Leaking Oil

[schassisowner]

Ok so my recently put back together 720 was chugging along great when all of a sudden it starts dumping oil out of the transmission.

 

I pull the driveshaft and the seal does not look damaged.  I went to Autozone to get a new seal and the one they gave me is probably 2mm smaller in diameter than the original seal that is in there.

 

was there a cutoff on the 720 when they went with another transmission.... i believe mine is the same as the early hardbody trans the B trans as it is sealed at the top where the shifter goes.  It can not leak oil from here as well can it?

 

 

[TENDRIL]

front or rear? seal? rear im assuming? 

 

also did you refill the tranny your self?

[datzenmike]

If an '85 720 it can only be a 5 speed 71B trans. The rear seal is Nissan # 32136-U0100 and used on the '71 240z through the Xterra

[schassisowner]

yes it is an 85 and yes i mean the rear seal of the transmission where the driveshaft mates to the trans.

 

good to know,  I noticed the seal on the one i picked up said 1981 on it perhaps the girl behind the counter thought i said 81....   

 

I did fill it myself.  I added enough to fill the case so i could feel a bit of fluid from the fill plug location.  I opened the top plug and i cannot feel any oil in it... perhaps I just added a bit too much and there was no where else for it to go?

[datzenmike]

The fill plug is half way up the side. Takes about 2 liters or 4 1/4 US pints. Hard to over fill and no need to. The oil seal just keeps in oil that is sprayed on it. Not intended to be submerged in oilb. Extra may drool out