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Old 10-06-2012, 08:38 AM
tmcalavy tmcalavy is offline
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Sad news and a Question

Well, got some sad/bad news from a trusted mechanic yesterday. He put my 93 Ranger supercab XLT up on the lift to find the source of the howling in my differential. Said all the bearings are making noise...not what I wanted to hear. I towed the Ranger 800+ miles behind a big Pennske truck when we moved from Texas to Miss. about 2 months ago...been making the howling noise ever since I took it off the tow dolly. Had the driveshaft off and tied up, and I changed the lube, put in some additive, and changed the driveshaft support bearing since then...hoping this would stop the noise. Mech thinks the diff bearings simply overheated on the trip since the truck was at an angle on the tow dolly and that it couldn't circulate the lube around at that angle. That's the back story. Have got a coupla sources for replacement differentials cause replacing the diff entirely will be cheaper than fixing the old howler.
Here's my question...are the spring perches, etc. in the same place on an 8.8-inch Ranger rear end as the perches, etc. on a 7.5-inch rear end? I've read online that it's a straight swap when you replace a 7.5 diff with an 8.8 diff, but thought I'd ask. I have a line on an 8.8-inch diff out of a 2000 Ranger with 4.0 engine and 4WD. Waiting for a call/text telling me what gear ratio it has...mine is 3.45 so I'm hoping it's somewhere near that so it will work with my 3.0 and auto tranny.
Thanks in advance, any input is appreciated.
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Old 10-06-2012, 09:05 AM
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grandmas77f150 grandmas77f150 is offline
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It should be a straight swap
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Old 10-10-2012, 08:54 PM
Aquaman78F100 Aquaman78F100 is offline
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I swapped an 8.8 in mine. It didn't take long at all, and hasn't had any issues so far. Just double check that the gear ratio is the same.
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Old 10-11-2012, 09:32 AM
tmcalavy tmcalavy is offline
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Thanks for the encouraging words. The guy with the 8.8 diff is dragging his heels, but I've found a 7.5 with 3.73 ratio and 9-inch brakes that I need to look at too. I know my truck (XLT) has 10-inch brakes, but don't think the smaller brakes will matter much...I'm an old coot and drive like one.
Is a lift essential for swapping differentials? I can get the swap done for about $175, but am wondering if I can do it myself. I have jackstands, a good hydraulic floor jack and an electric wratchet gun plus sockets. Anyone have any experience swapping a diff from ground level?....do-able or not? Any input is appreciated.
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Old 10-11-2012, 03:20 PM
Aquaman78F100 Aquaman78F100 is offline
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I used an A-frame and a chain to hold the rear of the truck up, but I imagine that sturdy jack stands will work just fine. I ended up with different sized brakes as well, the only time it matters is when your at the parts store trying to remember what size they are! Good luck
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Old 10-11-2012, 03:20 PM
 
 
 
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