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Unread 08-15-2009, 04:50 PM   #1
jetamerica
85 CJ7, 2012 Wrangler
 
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AMC 20 rear pinion seal, torque value, not again

Thanks to everyone for their help, the search on the pinion seal was very helpful. When I went to check the torgue value to turn the rear pinion assy prior to removing the pinion nut, tires and brake drums off, I was expecting about 20 inch pounds or so. Mine barely read anything, less then 5 inch pounds to turn the assy. I have had no problems in two years of owning this jeep. After I replace the seal should I tighten the pinion nut until it takes 10 inch pounds (the original 5 Inch pounds to turn the assy plus an additional 5 inch ponds) or should I tighten the pinion nut to a specific minimun torque value to turn the pinion assy. thanks and sorry for another pinion seal question.

1985 CJ AMC 20 rear with factory 3.31 gears, T-5, 6 cyl
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Unread 08-15-2009, 05:59 PM   #2
rixcj
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I'm no expert, but it sounds like that will work for you.

I just did the same thing, but my reading was 14 in./lbs. initially, so I re-tightened to 19 in./lbs.with a new seal in.

Hopefully, others will chime in.

Rich
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Unread 08-15-2009, 07:19 PM   #3
jetamerica
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rixcj,
I don't have the tools to make the tool to hold the yoke when I loosen the pinion nut, what did you use or did you make one.
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Unread 08-15-2009, 08:14 PM   #4
NelsonATC
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Used a large pipe wrench when I did mine. Worked great!
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Unread 08-15-2009, 10:54 PM   #5
rixcj
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Quote:
Originally Posted by jetamerica View Post
rixcj,
I don't have the tools to make the tool to hold the yoke when I loosen the pinion nut, what did you use or did you make one.
Yes. I made a yoke holder tool, several years ago. After the new seal was installed, I used an impact gun to get the new pinion nut close to touching the yoke, then, from there on , I used a ratchet the rest of the way.

I did VERY SMALL increments. Tighten a little, check torque. Tighten a little more, check the torque, again.

I followed this procedure until I was at 19 in./lbs, which was my target number.

I had to use the yoke holder throughout the entire nut tightening process.

Here are a few pics of it...







Rich
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'79 CJ5, AMC 360, t-18/d20 twin stick, dana 30/amc20(Mosers), Edelbrock Performer intake, Holley 600, ps/pb, DUI HEI, 'glass tub/1pc. tilt nose, 33x12.50 BFG AT's.

There's a fine line between "hobby" and "mental illness".
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