Location of ZF-6 gear oil fill plug?

jonnymoto · 10-29-2009, 03:30 PM

Can anyone tell me where the fill plug is on a ZF-6 trans?

I just crawled under to take a look and found 2 possible fill points:

1.) Right side - just behind the bell housing there's a really big (1"+) hex head bolt pretty close to the floor pan

2.) Left side close to the PTO cover there's a plug that looks just like the drain plug that would receive a 3'8" drive.

I'm guessing the one on the left side is the fill point, but it look awfully low considering the height of the transmission.

Thanks.

Jonathan

jonnymoto · 10-30-2009, 10:39 AM

...nobody...?

bump.

RedBowTies88 · 10-30-2009, 11:04 AM

there isn't many guys running zf-6 trucks on here (or anywhere for that matter) i assume you could call your local dealer and ask them...and if you still get nothing try asking on duramaxdiesels.com...slightly more technical over there

rotcartdj · 10-30-2009, 11:07 AM

i think i saw where some of the guys were popping the top of the shift tower off and filling from there to get a couple extra ounces in the case. to tell you the truth, i havent really looked at it on mine yet

jonnymoto · 11-02-2009, 07:18 PM

Stopped by the dealer today and confirmed the fill point is the plug on the left side of the trans just behind the PTO plate.

Torques:
Fill Plug 26 ft/lbs
Drain Plug 26 ft/lbs