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#51412 10/21/2005 2:36 AM | Joined: Nov 2001 Posts: 111 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2001 Posts: 111 | How difficult is replacing the front seal on the rear differential of a 47 3/4 ton truck? It is leaking right behind the driveshaft yoke. It has a bell shaped collar just behind the yoke and then there are 5 bolts holding on a steel flange. How tough is this going to be or does this job usually go fairly easy? thanks!! slowgoer
54 Chevy 5 window - 46 Chevy 1/2 ton
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#51413 10/21/2005 3:00 AM | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | It's important to put it back together just as it is now. Any tighter and it's overhaul time, at least a total disassemble to replace the pinion sleeve. First off, I clean the yoke, the nut and the pinion very well. I then index the three with a paint line from the center of the pinion, across the nut and onto the yoke. Remove the nut and yoke, do your repair, and put the yoke back exactly where it was. Tighten the nut down until it snugs up and then tighten it until the paint marks line up just as they did before disassembly. Easy as that,
Scott | | |
#51414 10/21/2005 4:14 AM | Joined: Nov 2001 Posts: 111 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2001 Posts: 111 | Thanks alot for the advice. I was wondering how much had to come off to do the repair and how critical it is to keep it in the same place. I think I can handle it using this info. slowgoer
54 Chevy 5 window - 46 Chevy 1/2 ton
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#51415 10/21/2005 9:27 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | After removeing the yoke you will have to pull that coller off as the seal is in back side of it. There is a thick cork gasket behind it. If its not available you can use RTV. You may need a puller to get the flange off. Yhey can be real tight. That rear end does not use crush sleeves so you can tighten the pinion on down & line up the cotter pin holes.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#51416 10/22/2005 2:46 AM | Joined: Nov 2001 Posts: 111 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2001 Posts: 111 | If the yoke has to be taken off with a puller, what about putting it back on, will it have to be driven on with a hammer or will it slide on easily. The question is, if you use a hammer, how hard can you hit it without damage to gears or seals or something else? I have had several of these old trucks but I have never had to do any differential work at all. I will get started on this repair in a couple of days so I'll see how it goes. thanks again for the info! slowgoer
54 Chevy 5 window - 46 Chevy 1/2 ton
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#51417 10/22/2005 9:10 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | It won,t be too hard to get back on. Put a little grease on the splines. You won,t hurt anything tapping it on as long as you don,t mushroom the holes for the u-joint bolts. If you get it on far enough to get a few treads you can pull it in with the nut. You will need a large socket I believe 1 9/16.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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