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Jul 21st, 2025 | | | | Joined: Apr 2013 Posts: 19 New Guy | | New Guy Joined: Apr 2013 Posts: 19 | The previous owner of my 56 1/2 ton had fitted new brakes to a rear end that is losing greasy oil out of the seals on the end of the tubes!
It looks like you have to pop the halfshafts out from inside the diff to change the seals and my workshop manual is not very clear as to how to do it.
Do you need any special tools? The manual refers to a seal puller and installer.
Many Thanks
Richard | | | | | Joined: Jun 2010 Posts: 1,001 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 1,001 | It is not very difficult:
Remove rear wheels and brake drums.
Remove differential cover (after draining oil).
Remove lock pin, pin, and spacer block from differential.
Push axle inward toward differential.
Remove C shaped axle retainers.
Pull axle out of axle tube.
Use a seal puller/pryer and remove seal.
Replace seal.
Repeat in reverse order for assembly.
I think I covered all the basic steps and remembered correctly. | | | | | Joined: Apr 2008 Posts: 888 'Bolter | | 'Bolter Joined: Apr 2008 Posts: 888 | Here's some additional info: http://chevy.oldcarmanualproject.com/shop/1955truck2/55ctsm0401.htmSeal puller not mandatory, just be careful not to damage sealing surface. Pullers are inexpensive and you may be able to borrow one from your FLAPS. Put a little lube on seal lip and tap new ones into axle tube. As Dave says it's not that hard. Biggest/messiest task is getting the axles out. Check axle shaft surface that seal rides on for damage/pitting....love the smell of gear lube!
Last edited by Forty9; 09/25/2013 10:58 AM.
Ed
| | | | | Joined: Mar 2002 Posts: 9,112 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,112 | You will find the lube will drain nicely if you remove a bolt or two at the bottom and the fill plug. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Here's a cheap and easy tip for getting the seals out without a puller; After removing the axle shaft from the housing, place it in the seal with lip of the seal locked in the C clip groove. Then swing the axle around to the opposite side of the seal and pry on it with gentle pressure. The seal will pop right out. This trick works on any C clip style rearend.
Bill Burmeister
| | | | | Joined: Dec 2001 Posts: 1,248 'Bolter | | 'Bolter Joined: Dec 2001 Posts: 1,248 | Be careful not to cut/knick the seals when reinserting the splines of the axle back in.
John | | | | | Joined: Apr 2013 Posts: 19 New Guy | | New Guy Joined: Apr 2013 Posts: 19 | Great thanks guys it was the getting the shafts out from inside the diff I wasn't sure about, I'm used to early Fords where it is all done at the wheel end.
Took the diff cover off last night and all looks ok.
Good opportunity to count the teeth to confirm what ratio I have.
Rich | | |
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