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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

9 inch rear diff

Old Sep 1, 2013 | 07:13 PM
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Zach Fullmer
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9 inch rear diff

I have a 68 f100 i recently have been replacing the spider gear in a 9 inch 10 bolt 3rd member my old gears were all gone and when replacing the new ones had no movement is this normal or did I do something wrong Im new to doing any rearend work and have nothing to go off of please help dont want to ruin my new gears thanks
 
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Old Sep 2, 2013 | 07:03 AM
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Area351
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Setting up a 9" rear it's not for a beginner. It takes special tools and knowledge to set up correctly.

I have no idea what you are trying to explain by your post.

Explain what you did better, what the problem is and post some pics. Just saying that something doesn't move doesn't mean anything.

That's like saying you rebuilt the engine and now there is this noise.......

Comprende?
 
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Old Sep 2, 2013 | 08:14 AM
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f100today
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1. Its called a ring and pinion

2. You need to check backlash and adjust to the correct specification. Meaning; the correct amount of meshing of the gear teeth between the ring gear and the pinion gear.
 
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Old Sep 2, 2013 | 08:25 AM
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Area351
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Originally Posted by f100today
1. Its called a ring and pinion

2. You need to check backlash and adjust to the correct specification. Meaning; the correct amount of meshing of the gear teeth between the ring gear and the pinion gear.
Unless he just replaced broken spider and side gears.......

Like I said: not enough info for us to help.

 
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Old Sep 2, 2013 | 03:21 PM
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All I have done was replace the spider and side gears they have no play is that normal haven't set my backlash yet I do know there are tools I need for that, just didn't have anything to base what the side and spider gears were supposed to be set wether play was needed or if they need to be in one position my original gears had all but 3 teeth broke
 
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