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Old 01-13-2014
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Front differential seal sizes

Ok, most likely a dumb question, but I need some help from the experts on this. I have an '04 Ranger XLT, extended cab, 4x4, 4.10 open gears, 8.8" rear. Now, with all of that said, I need the front pinion and axle seals (leaking).

What I need are the sizes or part numbers for the following:

FL axle seal
FR axle seal
I can find the pinion seal, but the other two have an option for 7.5, 7.9 or 8.8" ring gear. Now, I'm assuming that with an 8.8" rear....it would be the same size in the front? Is there an easy way to check without having to drop the assembly and just measure the ones I take out?
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Old 01-13-2014
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I went to Advance and just checked Rockauto. The FL and FR axle shaft (differential output shaft) seals are 2 different sizes....not even close in person. Here's the part numbers and information from Rockauto:

FL:
National - 710429
Spicer 35, 7.59" RG
Shaft size = 1.38"
Housing Bore = 2.288"
Outer Diameter = 2.291"
Flange Diameter = 2.638
Width = .75"

FR:
National - 710428
Spicer 35, 7.59" RG
Shaft size = 1.75"
Housing Bore = 2.621
Outer Diameter = 2.625"
Flange Diameter = 3.071"
Width = .937"


Is one of the axle shaft ends that much different in size than the other? From looking at some various videos it does look like the passenger side axle has a larger inner spline/flange....but I can't be certain. Any help would be appreciated.
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Old 01-14-2014
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Quote:
Originally Posted by web View Post
I went to Advance and just checked Rockauto. The FL and FR axle shaft (differential output shaft) seals are 2 different sizes....not even close in person. Here's the part numbers and information from Rockauto:

FL:
National - 710429
Spicer 35, 7.59" RG
Shaft size = 1.38"
Housing Bore = 2.288"
Outer Diameter = 2.291"
Flange Diameter = 2.638
Width = .75"

FR:
National - 710428
Spicer 35, 7.59" RG
Shaft size = 1.75"
Housing Bore = 2.621
Outer Diameter = 2.625"
Flange Diameter = 3.071"
Width = .937"


Is one of the axle shaft ends that much different in size than the other? From looking at some various videos it does look like the passenger side axle has a larger inner spline/flange....but I can't be certain. Any help would be appreciated.
That is correct passenger side is much bigger in diameter. It has a female end on it which splines into a small shaft inside the diff as the drivers side is a male and slides right into the carrier.
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Old 01-14-2014
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Awesome and thanks for the reply! I'll get getting the set of seals tonight. I have 2-3 quarts of GL-5 AMSOIL 75W/90 to refill it with, so hooray for buying more than I needed a year ago :).

I'll be dropping the entire unit, so doing this job on a bench in a shop should/will be much easier than while on the cold ground and in the rain.
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Old 01-17-2014
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Fun job. Got all the seals in nicely and sealed them all with RTV. Put it all together and ensured the pinion backlash was exactly the same as it was prior to me touching it. All buttoned up and left the shop.....and then a moaning sound! Yup, I figured I somehow over torqued the pinion.

After inspecting everything for 10 minutes with my brother in law, we isolated it to the passenger front tire area. Hmmm, ok. Well, I drove it another mile to a parking lot at my work. As I turned in, my steering wheel shot to one side for a second. Odd.....well, I parked and my brother in law said "Your wheel is fucked!"

I was completely confused as to why, but when I looked I have some massive negative camber! hahahaha.....Come to find out, I must have over torqued the axle nut on that side, which compressed the hub bearing too much and BOOM! Small cylindrical bearings everywhere with metal cage shards.

I averaged out on Mitchell's site (like Chilton's) what the differential job would cost me (parts and average shop labor fee of 87$/hr).....1200$. Well, I bought the parts for 54$ and the bay fee was covered by my brother in law for past help I've provided on his STi. So, I now am buying a 180$ Moog hub bearing and can get the truck towed back to the shop for maybe 60$. All in all, I'm still WAY in the green :)
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