Winter projects - ZR-1 Net Registry Forums

AlbanyBrian · 11-21-2023

A few pictures from the pinion seal R&R.

Getting started:

Getting started, viewed form back:

Rear portion of exhaust removed, lots of grease from seepage:

Exhaust removed, driveshaft removed, pinion flange and seal removed (C-beam back in place while seal issue was resolved, see below):

New seal installed and mostly cleaned up:

Pinion flange holder and torque wrench in place ready to tighten pinion nut to spec:

One thing I found out with the 4:10 gears the pinion seal and pinion nut are not the same as with the original gear set. The set up in this car required the Dana 36 pinion seal and pinion nut. I do not know when this gear set was installed, probably 20+ years ago. But apparently the pinion used has a smaller OD pinion flange and a smaller nut compared to the original gear set. The pinion seal and nut I ordered for a 1993 Dana 44 were not correct, the nut was too larger and the opening in the seal for the pinion flange was too large. The seal I removed when I cross referenced the number on it turns out to be the seal for the Dana 36. The diff. is a Dana 44.

I torqued the pinion nut per the Dana 44 spec, I wonder if I should torque per the Dana 36 since nut is the smaller size of the 36? Any thoughts on this?
Regards,
Brian

11-21-2023	#12
AlbanyBrian Join Date: Feb 2023 Location: Albany, Oregon Posts: 36	Re: Winter projects A few pictures from the pinion seal R&R. Getting started: Getting started, viewed form back: Rear portion of exhaust removed, lots of grease from seepage: Exhaust removed, driveshaft removed, pinion flange and seal removed (C-beam back in place while seal issue was resolved, see below): New seal installed and mostly cleaned up: Pinion flange holder and torque wrench in place ready to tighten pinion nut to spec: One thing I found out with the 4:10 gears the pinion seal and pinion nut are not the same as with the original gear set. The set up in this car required the Dana 36 pinion seal and pinion nut. I do not know when this gear set was installed, probably 20+ years ago. But apparently the pinion used has a smaller OD pinion flange and a smaller nut compared to the original gear set. The pinion seal and nut I ordered for a 1993 Dana 44 were not correct, the nut was too larger and the opening in the seal for the pinion flange was too large. The seal I removed when I cross referenced the number on it turns out to be the seal for the Dana 36. The diff. is a Dana 44. I torqued the pinion nut per the Dana 44 spec, I wonder if I should torque per the Dana 36 since nut is the smaller size of the 36? Any thoughts on this? Regards, Brian Last edited by AlbanyBrian; 12-23-2023 at 10:44 PM.