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Author Topic:   Ford 7.5 rear-end shims
jimshar
Dirt Full Roller

Total posts: 67
posted April 01, 2005 04:45 AM  
Anyone know where I can find rear-end shims for a ford 7.5"? I just put in new gears (4.10) and they arent linning up right. If anyone has ever had to shim this type of rear any help would be good. This is my first time and the kit did not include very good directions as to where the shims would go. I have been told that you would place a shim behind the pinion gear bearing (the bearing right behind the gear itself). If that is the case it would seem difficult to do because you would be putting the bearing on,install the pinion, measure the distance from end of pinion gear to centerline, remove pinion gear, remove bearing, install shim, put it back together and remeasure until the right spacing is achieved. Is this how it is done?

racer30
Dirt Roller

Total posts: 20
posted April 01, 2005 05:34 AM  
jimshar the shim or shims go behind the pinion seal @ the yoke for your drive shaft. that is in between the yoke and the bearing there is also a spacer that goes on the pinion shaft in some cases you can get it at your local parts store.

hope this helps

jimshar
Dirt Full Roller

Total posts: 67
posted April 01, 2005 03:05 PM  
Thanks, that is where I did put one but then someone said it belonged behind the front bearing. Thanks again!!!!!!!
quote:
Originally posted by racer30:
jimshar the shim or shims go behind the pinion seal @ the yoke for your drive shaft. that is in between the yoke and the bearing there is also a spacer that goes on the pinion shaft in some cases you can get it at your local parts store.

hope this helps



racerman707
Dirt Freak

Total posts: 374
posted April 02, 2005 06:52 PM  
Hold on and make sure of the shims before you burn it up. There is a shim between the yoke and bearing to serve as a oil slinger for the seal. You need a pinion depth tool to figure out what shims to use. Or do like I use to and guess by using the shim that was in the rear end from factory. Never had one come out yet. Lucky I guess.

jimshar
Dirt Full Roller

Total posts: 67
posted April 04, 2005 05:07 AM  
Well thats what I did, I put the old shim in and checked the depth and it measured perfect. I first called ford for a new shim and they said the original factory installation did not have one. What do they know because it did. So anyway the old shim was perfect. This shim was between the front bearing and the pinion gear and another was in front of the seal. measured to the spec of the new gears.
quote:
Originally posted by racerman707:
Hold on and make sure of the shims before you burn it up. There is a shim between the yoke and bearing to serve as a oil slinger for the seal. You need a pinion depth tool to figure out what shims to use. Or do like I use to and guess by using the shim that was in the rear end from factory. Never had one come out yet. Lucky I guess.


racerman707
Dirt Freak

Total posts: 374
posted April 04, 2005 06:23 PM  
Now check the backlash on the gears, mark the teeth and mesh it and it'll be there till dooms day!

jimshar
Dirt Full Roller

Total posts: 67
posted April 05, 2005 05:44 AM  
LOL<<< Everything is set. The only thing that they forgot to tell me when I ordered the gears was that I needed a different cross pin. The new ring gear is fatter than the old one I removed and it is just in front of the hole for the cross pin so now the original cross pin will not go in. I'm thinking about machining a flat spot down the lenght of the cross pin just enough for it to slide in past the ring gear. I was wondering if this is what they do for the special pin that is needed.Any ideas?
quote:
Originally posted by racerman707:
Now check the backlash on the gears, mark the teeth and mesh it and it'll be there till dooms day!


racerman707
Dirt Freak

Total posts: 374
posted April 05, 2005 06:14 AM  
Exactly. The pin is shaved just enough to clear the ring gear. It is only cut a little over half way down though. After it's cut, put the pin in the chunk then put the ring on. The pin will slide out just enough to get the axles slid in and pull the clips off.

jimshar
Dirt Full Roller

Total posts: 67
posted April 05, 2005 06:38 AM  
Thats what I thought,making one up(or 2) as we speak. Thanks for the help.
quote:
Originally posted by racerman707:
Exactly. The pin is shaved just enough to clear the ring gear. It is only cut a little over half way down though. After it's cut, put the pin in the chunk then put the ring on. The pin will slide out just enough to get the axles slid in and pull the clips off.


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