PumpinIron

I've attached a picture of the bolt I am talking about. I am curious if anyone knows what size the bolt is as well as the thread pitch and any other info I might need when buying a replacement bolt for it at the hardware store. I am replacing the front pinion seal and I figure I will just replace this bolt while I am at it with a new one. Need to get the bolt first though so I need to know all the specs.

Thanks!

OverlandZJ

It's a nut.. and a hardware store most likely wont have it. Quadratec, and most vendors will have it.

That's a pretty good leak, how much slop does the yoke have laterally?

You could use the same nut and a bit of Loctite. Count the threads showing and realign the white marks on reassembly.

PumpinIron

My bad, I knew it was a nut, just confused myself!

Anyways, my local Ace Hardware seems to have about every bolt you could ever imagine so there is a good chance they might have it to be honest.

That's not my photo, I just found it with a Google search. Mine is leaking but nowhere near as bad as that thing is!

Not sure why they used those white marks on it, what is that for? As long as I torque it to the proper spec isn't that all that matters?

PumpinIron

Well does anyone at least know the size of the nut by chance?

salad

The pinion nut - there is no bolt - is 3/4"-16 thread pitch, 1-1/8" socket. Probably supposed to be hardened.

PumpinIron

Damnit, I keep confusing my nuts and bolts when I already know the difference, arghhh!

1-1/8 socket? Glad I asked, I did a search and someone else was saying 1-1/4 but that was for an older XJ, maybe they changed it on the 97+ models?

Thanks for that info though, I'll see if my local hardware store has a bolt this size that's hardened. If not it's no big deal but they seem to have just about every bolt imaginable.

PumpinIron

You sure you didn't mean 3/8-16 thread pitch?

Just checked out the hex nuts on McMaster Carr here... http://www.mcmaster.com/#hex-nuts/=oy6c2c

Doesn't look like they have any hex nuts at all in a 3/4-16 thread pitch. Unless I'm missing something...

01SiennaXJ

They have 3/4-16 on McMaster. When in doubt, you can always measure the OD of the stud that the nut is on to get an idea of the thread diameter, and measure the number of threads per inch to figure out the pitch.

PumpinIron

Thanks for that useful bit of info, I'll remember that.

Didn't see a 3/4-16 on there but I'll look again. I must have missed it.

salad

Dana 30's been the same for a long time. That's what makes it a Dana 30. The Chrysler 8.25 pinion nut can be yanked off with a 1-1/4" socket.

3/8"? Lol have you ever seen a D30 pinion?

PumpinIron

I have yet to see a D30 pinion... This will be my first time once I remove the nut.

Is my front driveshaft supposed to say D35 engraved on it?

SteveMongr

There should also be a mark on the drive-shaft so that it re-installs with the same orientation. The output yoke of the transfer case is probably also marked and should be matched up as well.

PumpinIron

Maybe this is a dumb question but why does it matter if all the marks are lined up? Seems like if everything is torqued properly it wouldn't make a difference.

SteveMongr

In a word 'balance'. The shaft spins at such a speed that if it is not centered and balanced it will vibrate and eventually fail.
As a general rule when taking apart things that spin, the parts should go back together with the same orientation.

PumpinIron

Thanks for clarifying that! I'll mark everything before I remove it. I just wasn't 100% sure what the reason for this was.