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Unread 10-22-2014, 11:02 AM   #1
haroldrussi
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TORX size on bell housing

What size are the TORX bolts on the top of the bell housing holding it to the 1998 TJ 4L motor??? it is bigger than a t60....

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Unread 10-22-2014, 01:16 PM   #2
jdunk813
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What transmission is it? On my NV3550, the top two bolts are actually E12. These are a external or reverse torx.

This seems to be a pretty good write up, and at step 9 you can find a picture of these external/reverse torx bolts.
http://dailydriventj.com/forum/viewtopic.php?t=931
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Unread 10-22-2014, 01:26 PM   #3
haroldrussi
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Thanks, the biggest one I have is a E-10 so off to SEARS for a set I guess...
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Unread 10-22-2014, 03:53 PM   #4
Jerry Bransford
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Yes , E-12 for your '98 transmission bell housing. E-10 holds the transfer case to the transmission.
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Unread 10-22-2014, 09:35 PM   #5
geroux
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Great! More tools to buy. I haven't had to tackle that one yet but I might as well be prepared.
But, the front hub bolts look like the same thing and a twelve point socket works? I know that is no excuse for not having the correct tool.
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Unread 10-22-2014, 09:53 PM   #6
Jerry Bransford
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A 12 pt. 13mm socket fits those three bolts perfectly.
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Unread 10-22-2014, 10:36 PM   #7
geroux
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Quote:
Originally Posted by geroux View Post
...But, the front hub bolts look like the same thing and a twelve point socket works? I know that is no excuse for not having the correct tool.
Quote:
Originally Posted by Jerry Bransford View Post
A 12 pt. 13mm socket fits those three bolts perfectly.
I know. I guess the question mark threw you off. Point was that a twelve point works on the axle hubs maybe a twelve point would work on the OP's bolts. Or, maybe not... don't know 'till tried. He's probably been to Sears and back though.
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Unread Yesterday, 03:32 AM   #8
rchase559
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Originally Posted by geroux View Post

I know. I guess the question mark threw you off. Point was that a twelve point works on the axle hubs maybe a twelve point would work on the OP's bolts. Or, maybe not... don't know 'till tried. He's probably been to Sears and back though.
A 12 pt socket didn't work for me when I had to pull the transmission a few weeks ago.

The bolts for the axle hub have 12 pt heads. The bolts holding the bell housing to the engine do not. They don't look all that similar when you are able to get a good look at each.
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Unread Yesterday, 05:36 AM   #9
richardprovince
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I've rounded a bolt head or two using 12pts on E-torx. Bell housing bolts don't require much torque though
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Unread Yesterday, 07:43 AM   #10
mrblaine
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Originally Posted by richardprovince View Post
I've rounded a bolt head or two using 12pts on E-torx. Bell housing bolts don't require much torque though
They are 3/8-16 which max out at around 45 ft lbs of torque but due to the nature of flange bolts against cast aluminum, the break-away is generally much higher.
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Unread Yesterday, 08:08 AM   #11
Jeepsr4me
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Yeah those are some small bolts to be in there so dang TIGHT.

And for that person above that thinks a 12 point would work. NAH well it can but you got to weld it on there. I did that. cause I sheared the star socket
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Unread Yesterday, 09:30 AM   #12
richardprovince
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Originally Posted by mrblaine View Post
They are 3/8-16 which max out at around 45 ft lbs of torque but due to the nature of flange bolts against cast aluminum, the break-away is generally much higher.
Dissimilar metal corrosion? Or leaving a footprint on the aluminum?
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Unread Yesterday, 11:06 AM   #13
Jeepsr4me
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Dissimilar metal corrosion? Or leaving a footprint on the aluminum?
No I think they found the biggest guy and called him a Girly man for tightening like a girl. So He tries to break them off every time one is tighten...


The pics are of the bolts and they dont have corrosion on them nor do they dig into the bell housing.
They are just stupid tight, but once it POPS you can take them out by hand.
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Unread Yesterday, 11:58 AM   #14
richardprovince
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I'm sure someone would of mentioned it if it was, but possibly torque to yield?
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Unread Yesterday, 01:27 PM   #15
Jeepsr4me
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Every Torque to Yield bolt I ever used had a shank to it, that is where they stretch.. These are threaded all the way. So if you start yielding on them that snap.
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