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Unread 05-18-2009, 02:18 PM   #1
chrisstromberg
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in/lbs on torque wrench

I just went and borrowed a torque wrench from autozone for some transmission service I'll be doing tomorrow (first time). The wrench is in ft/lbs, which is perfect for my diffs which need 35 ft/lbs, but the service manual says that for the transmission pan I need 144 in/lbs, which comes out to 12 ft/lbs. The lowest setting on the wrench is 25ft/lbs, and the manual says not to go lower then that. Short of finding a second torque wrench that reads lower, what is the easiest way to achieve 12ft/lbs of torque for the transmission pan?

Thanks a bunch

Chris

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Unread 05-18-2009, 02:18 PM   #2
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Quote:
Originally Posted by chrisstromberg View Post
I just went and borrowed a torque wrench from autozone for some transmission service I'll be doing tomorrow (first time). The wrench is in ft/lbs, which is perfect for my diffs which need 35 ft/lbs, but the service manual says that for the transmission pan I need 144 in/lbs, which comes out to 12 ft/lbs. The lowest setting on the wrench is 25ft/lbs, and the manual says not to go lower then that. Short of finding a second torque wrench that reads lower, what is the easiest way to achieve 12ft/lbs of torque for the transmission pan?

Thanks a bunch

Chris
going back and getting a In/lb trust me ull want it.
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Unread 05-18-2009, 02:23 PM   #3
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If you have a harbor freight around there, they sell cheap torque wrenches.
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Unread 05-18-2009, 02:54 PM   #4
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For info only

Torque wrenches are more accurate at the middle of the scale.

To be more accurate, exercise the torque wrench at full scale 6 times before setting the desired torque reading.
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Unread 05-18-2009, 03:23 PM   #5
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You will need a smaller torque wrench. I have 4 different torque wrenchs at work that overlap alot so I can always be in the middle of the torque range since that is where they are most accurate. I would also find a smaller one to do the diffs. I would find on that did say 5-50 ft lbs if I had to have 1 to do both bolts.
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Unread 05-18-2009, 04:25 PM   #6
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Frankly, for the tranny pan use a 1/4" drive ratchet and tighten the bolts manually. Stop when the torque needed to continue turning exceeds what you can easily supply with a single hand. Too loose = Leak. Too tight = stripped threads. You would have to work pretty hard to strip those threads w/ a 1/4" ratchet about 6" long.

There are many things for which a torque wrench is pretty important (Bearing caps, etc.). For most it is not.
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Unread 05-18-2009, 04:28 PM   #7
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get a one foot pipe and apply a 12 lb force at the end of it.
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Unread 05-18-2009, 04:45 PM   #8
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get a one foot pipe and apply a 12 lb force at the end of it.
Fish Scale FTW!
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Unread 05-18-2009, 05:17 PM   #9
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I picked up a 5-50ft/lbs torque wrench from harbor freight for 20 bucks. That should give me good enough accuracy, right?
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Unread 05-18-2009, 05:21 PM   #10
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Chris, that should be good for what you are doing.


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Fish Scale FTW!
Or just tie a 12 lb fish to a one foot pipe.
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Unread 05-18-2009, 05:35 PM   #11
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Chris, that should be good for what you are doing.




Or just tie a 12 lb fish to a one foot pipe.
I was haveing a crappy day till I read this
Thanks.
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Unread 05-18-2009, 05:59 PM   #12
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use a 1/4" ratchet or 3/8" and only put your hand over the head of it. give it a 1/8 turn after you get to the point you can't turn it with your hand on the head like that. should be somewhere around 12-18ftlbs according to my calibrated arm.
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Unread 05-18-2009, 06:20 PM   #13
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use a 1/4" ratchet or 3/8" and only put your hand over the head of it. give it a 1/8 turn after you get to the point you can't turn it with your hand on the head like that. should be somewhere around 12-18ftlbs according to my calibrated arm.
That's what I was going to suggest but you never can tell if Hercules or PeeWee Herman is going to be on the business end of the ratchet.
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Unread 05-18-2009, 06:50 PM   #14
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I have little "flying saucer" ratchets (disc-shaped ratchets with no handle) that I use for light-duty screws like this. No handle means no leverage, so I can only get it "fingertip tight" and that's it. Since I can't get much grip on the thing (they're lightly knurled,) that effectively limits the torque I can apply.

Saves me digging out my pound-inch torque wrench or torque screwdrivers (the latter were spendy as all get out!)
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Unread 05-18-2009, 07:15 PM   #15
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Or if I'd seen this earlier I would have asked the OP if he was in the SLC vicinity of Utah. I've got three torque wrenches of different values.
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