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trying to find out axle code

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Old Jul 12, 2009 | 08:05 PM
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trying to find out axle code

I need to find out which axle I have in my 1997 f250 4x4. My rear diff. cover is rusted through and I guess I did not expect it to be hard to find out which one I need. My door sticker says axle code C5 The tag on the axle says 8 132P 10 10 27K21. Can anyone help me? Thanks
 
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Old Jul 12, 2009 | 08:18 PM
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From: Munroe falls, Ohio
4.10 limited slip
 
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Old Jul 12, 2009 | 08:21 PM
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How did you come up with that info? Also is it a dana rearend,10.5" or what? any help?
 
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Old Jul 12, 2009 | 08:28 PM
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its a sterling 10.25" rear axle. I found the "axle code decoder chart" in our article page, in the drivetrain section.
 
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Old Jul 12, 2009 | 08:43 PM
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Thanks alot for the info. I'm new to diesel trucks and to this site. I have always wanted a powerstroke, finally got the chance to buy one last week from a friend who bought it new and did no mods on it.I read about the 6637 air filter mod. Does it really make a difference,if so how much better is an air box setup? I got lots of quetions but I'll read through the forum to get some answers. Thanks again. Mac
 
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Old Jul 12, 2009 | 08:48 PM
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the factory airbox was recalled because it leaked dirt past the airfilter into the engine. check the turbo fins to see if the engine has injested dirt in its lifetime. They should be straight and sharp not dull and chipped. also check the orange intake boot by the turbo, i believe its been recalled because it rips easily and leads to dirt injestion.
 
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Old Jul 13, 2009 | 06:31 AM
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Welcome to FTE.
Your axle code says 4:10 LS like already stated.....IF.... the gear hasn't been swapped out for a 3:73 or 3:55. The only way to know for sure is to open it up.

If you are looking for a new diff cover you can use one from any sterling 10.25 or sterling 10.5. There was an aluminum finned cover for sale at the dealership a couple years ago for about $35....
Part number 8C3Z-4033-A
More info:
https://www.ford-trucks.com/forums/6...ver-cheap.html
 
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Old Jul 13, 2009 | 07:46 AM
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Most of the internals from the 10.5 will work in a 10.25 as well.

The 6637 filter is a great mod to do. Also to go with it a 3" downpipe compliments it very well helping get the air out that you let in.

If I were to do only two mods those would be the ones.
 
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Old Jul 13, 2009 | 11:24 AM
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Thanks for all the info. Why all the talk about a 3" down pipe? It appears to have a 4" down pipe now. I know it is oblong but it should still have as much airflow as a 3". Is it because a 3' is smooth inside?
 
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Old Jul 13, 2009 | 11:49 AM
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The squashed one really restricts flow. And it only ends up as 3.5" in the end.

I put the 3" in mine and it made a big difference in how fast the turbo spools. They also make downpipes that start at 3" and then change to 3.5" or 4" by the end of it.

https://www.ford-trucks.com/forums/8...ml#post7657806

That's the post I did on my downpipe install. You can see a big difference in the pics.
 
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Old Jul 13, 2009 | 01:57 PM
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I loked at your pics on the down pipe install. If you go with a 3" do you have to beat in the firewall or any other mods? How long did it take?
 
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Old Jul 13, 2009 | 02:03 PM
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There's a body seam that you cut in two places (about halfway down the firewall) and then bend up as much as you can. There's also a heat shield there which some people leave or you can trim it.
It would have only taken me about 2 hours but the sawzall I was using to cut it was battery powered and the batteries died too fast for me to cut the whole downpipe all at once.
Really wasn't too difficult, and should only take 2-3 hours to do it.

Also a lot of guys do a Cat delete at that point too. Mine was already gone when I did it and I made a custom exhaust after the downpipe.
 
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Old Jul 13, 2009 | 02:50 PM
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Originally Posted by Cuda_jim
The only way to know for sure is to open it up.
or jack the rear end of the truck up. draw a line on the driveshaft and one on the tire. have one person turn the tire one full rotation while the other counts the number of revolutions on the driveshaft.
 
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Old Jul 13, 2009 | 03:46 PM
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Originally Posted by phillips91
or jack the rear end of the truck up. draw a line on the driveshaft and one on the tire. have one person turn the tire one full rotation while the other counts the number of revolutions on the driveshaft.
Won't work for an open carrier unless you get bith tires turning together.
It might work if it's a LS carrier....but the clutches need to be in good shape (not slipping) and/or the brakes are backed off so both sides turn together.
 
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Old Jul 13, 2009 | 03:58 PM
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Originally Posted by Cuda_jim
Won't work for an open carrier unless you get bith tires turning together.
It might work if it's a LS carrier....but the clutches need to be in good shape (not slipping) and/or the brakes are backed off so both sides turn together.
it will work on a l/s for sure. i was just under two of them last night taking the driveshafts out. ill have to check it on an open one in the next day or two. thats how ive always checked them though.
 
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