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94 850 drive axle nut question

Help and Advice on Volvo's extremely popular car line, powered by Volvo's nearly indestructible, versatile inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

94 850 drive axle nut question

Postby skippythepuppy » 03 Jun 2010, 20:10

hi everyone and thanks for checking my post.

I'm going to replace my left front drive axle and I'm checking out the nut which my haynes manual says is a 20mm nut on pre 95s and 22mm on later models. I don't have a socket to fit this thing so i went to our po-dunk hardware store and of course they have no metric sockets. It appears that it is about 1 7/16" they don't have this size. So what size is it? To me the 20mm that the Haynes manual refers to is actually the diameter of the axle shaft and the service side of the nut measures about 35mm. I'll need to order one online so can anyone confirm 35mm as the correct size of socket that I need to order and if anyone has suggestions of where to order that.

I love living in a rural area, but it sucks not to have an auto parts store in town

thanks for the help
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Re: 94 850 drive axle nut question

Postby whoa » 03 Jun 2010, 20:28

I had thought that it's 36mm for all years of the 850, but I see people saying 34mm and 32mm for some earlier axles.
1996 850 Turbo Wagon
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Re: 94 850 drive axle nut question

Postby charlyW » 03 Jun 2010, 21:40

for my 93 850 N/a I used a 34mm socket never use an imperial socket on a metric bolt/nut
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Re: 94 850 drive axle nut question

Postby JimBee » 03 Jun 2010, 22:18

Last summer I changed my drivers side axle on my '93 850. I think the socket was a 36mm. I borrowed one from Auto Zone. They required a deposit but returned it when I brought the socket back.

BTW: Auto Zone stocked a pretty good assortment of large sockets for loans.
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Re: 94 850 drive axle nut question

Postby FCPGroton » 04 Jun 2010, 00:06

I did the front axle on my 94 Volvo 850 and the nut size was 32MM.
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Re: 94 850 drive axle nut question

Postby patrioty3k » 04 Jun 2010, 00:08

:D Remembering correctly that nut is torqued at 300 ft. lbs.,believe me,i broke a 1/2" braker bar with a cheater pipe :oops: Need impact/ air wrench!
1995 850 Turbo S/Wagon,Alpine head w/Sirius Sat. Radio--"OCTANE" power!
200K $400 Sleeper...nuff said!
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Re: 94 850 drive axle nut question

Postby 850tech » 04 Jun 2010, 00:51

The torque spec is 120 Nm (89 ft. lbs) + 60°
Do not over torque, and DO NOT use and impact gun as this is the leading cause of premature bearing failure. In fact most bearings come with a little warning in the box about impact gun usage due to so many bearing failures and warrenty claims.
You can use a gun to bring the nut close but always tighten to spec.

Sorry forgot socket size. Mine are 36mm but that said some aftermarket come with 32mm or 34mm, I've seen 32mm and 36mm on the same car from one side to the other, so unfortunatly I can't say with certainty what size yours may be.
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Re: 94 850 drive axle nut question

Postby skippythepuppy » 04 Jun 2010, 07:10

Thanks for all your replies,

I had hoped it would be a little more straight forward of an answer 36mm, 34mm, 32mm. we will see. I may end up driving into the big city and verifying it in person before buying or Borrowing, thanksfor the tip on autozone lending tools. I'll post my conclusions. Thanks for all your input
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Re: 94 850 drive axle nut question

Postby wheelsup » 04 Jun 2010, 14:53

Advance Auto also has a wheel bearing kit that has 4 sockets in it. Impact grade, I think 30, 32, 34, and 36 mm. It has the one you need. $50 and you get it back when you return it, there is one 3 miles up the road from me that I've gotten that from like 4x in the past year. I just need to buy a set haha.

I used an impact to remove the nuts, they are on there pretty good. My Lowes/Kobalt impact spun them off. It wouldn't budge the crank nut though.
1995 850 GLT Wagon w/ 175,000 miles
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Re: 94 850 drive axle nut question

Postby patrioty3k » 04 Jun 2010, 21:24

:oops: Sorry to skippythepuppy,850tech,I was wrong about the torque @ 300 ft. lbs., actually should be 89 ft. lbs. in that ballpark,what I was actually trying to say was, that on my son's '96 850 glt ,the nut was on so tight,I had go to local garage to 'break it loose' with an impact wrench..both our '96 GLT{past} and my present '95 Turbo uses the 36mm socket....hope this helps! :mrgreen: TRY the 36mm.....
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200K $400 Sleeper...nuff said!
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Re: 94 850 drive axle nut question

Postby petek153 » 04 Jun 2010, 22:59

According to my repair manual you first torque it to 89ft lbs then an additional 30 degrees. One would think they would just say what the finish torque is but they use that additional degree setting.
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Re: 94 850 drive axle nut question

Postby Red-Arrow » 08 Aug 2011, 11:29

Saab 900 turbo 170Ibs to 200ibs FTP

Honda Accord 181ibs FPT

2002 4Runner is 174 ft-lb

I just bought a 24 inch breaker bar and I intended to use a cheater pipe as well. As 180Ibs is more than I weigh. I just can't imagine opening the hub or axle nut with my own body weight. Its never happening before in doing this job around 5 oddtimes.

You must be missing the degrees of turning on top of 89Ibs which I would think could be 50 to 100 degrees?
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Re: 94 850 drive axle nut question

Postby Ozark Lee » 08 Aug 2011, 22:00

In the event that you haven't figured out your specific size it largely depends on the axle. The OEMs have one size but most of the aftermarkets are another size and there is no rhyme or reason to the aftermarket sizes - they are what they are. It is virtually impossible to say with any certainty what you have until the wheel comes off.

I bought a piece of junk 3/4" drive socket set from Harbor Freight specifically to deal with axle nuts and thus far - several axles later - it is hanging in there and I seem to have a socket that will fit every iteration of the axle nuts.

...Lee
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