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Old 08-30-2014, 06:55 PM   #1
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Default Donor driveshaft for 8.8-10.25sterling swap

My truck currently 01 f150
4.2
M5od
8.8 disk brakes!
Reg cab long bed
I have a 10.25semifloating disk brake axle from 99f250 I want to swap into my truck. Is there a drive shaft that is in another truck I could use for this swap? Maybe a f250 with 4r100 and 10.25 would be close to the right length ? Ideas
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Old 08-30-2014, 07:14 PM   #2
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Nope your gonna have to get one made. Use your existing yoke and get a yoke for the 10.25 and have one made.
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Old 08-30-2014, 07:18 PM   #3
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Just curious why the swap?
The 8.8 is plenty strong for the 4.2. Are you having problems with it?

Best thing to do would be to use the current drive shaft and have it modified (I am guessing your current shaft would be too long?) to fit the new axle.
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Old 08-30-2014, 07:38 PM   #4
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I have always had terrible luck with 8.8s had ranger that busted a tooth had 150 that blew up center and a friend who baby her truck had rebuild the whole thing and now this axle I already at 128k axle shaft bearing was smoked! So I'm just sick of 8.8s and figure I will put axle in that I couldn't posssibly hurt with this six! Plus I want the gearing 373 with posi for my 19foot boat on the launch Ramps!

I may just use a axle that was rebuilt for my friends truck but I need to swap it over to disk brakes if it's gonna be a lot cheaper to swap that but I'll just end up with problems with that one down the road as I always seem to have ! It's a 355pos but I just like the peace of mind of having an axle that is much stronger than I'll ever need
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Old 08-30-2014, 07:43 PM   #5
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The 10.25 pinion is roughly 3" longer so I need to cut it back about that far! I got luck cause the flange for the 8.8 axle bolts right to the 10.25 flange
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Old 08-30-2014, 07:51 PM   #6
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Is that a 28 spline or 31 spline?
8.8's are relatively strong and reliable axles, odd your seeing so many issues with it.
I know the 8.8 out of the Explorer (31 spline) is a go to axle in the Jeep world to replace the crappy Dana 35. They handle a lot more abuse on trails than the 4.2 can put out on the street.
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Old 08-30-2014, 09:56 PM   #7
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I don't know if any of the 8.8 where 31 spline or not never bother to count but I I can only assume that the. 355 posi I have is a 31 cause I don't think 28 has the option for posi! I could be wrong but even if it is the 31spline it was already completely rebuilt at 130k
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Old 08-30-2014, 10:39 PM   #8
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Just did a little searching, the F150 8.8 is a 31 spline.
Still, odd your having issues like these. I know the stock diff is a weak point and is suggested for a complete upgrade (like a full locker) and the tubes have been known to spin (they are held in by 3 rivets, the fix is to weld them), also some say the shafts are a little weak, but this is for off roading builds, not street use.
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