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Changing 8 3/4 axle housing seal #341768 06/08/09 10:42 PM 06/08/09 10:42 PM
Joined: Mar 2008 Posts: 571 Western NC 68Bullit OP mopar
68Bullit OP mopar Joined: Mar 2008 Posts: 571 Western NC	Gonna be changing the driver's side seal and wanted any tips or secrets on the change that may help. I've got a tool to extract the old seal and I have a seal driver for the new one. Is it a fairly simple change? Thanks

Re: Changing 8 3/4 axle housing seal [Re: 68Bullit] #341769 06/08/09 11:01 PM 06/08/09 11:01 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	measure the depth of the old seal & drive the new one in to that depth and put a smear of gasket cement(permatex #2 my fav) around the housing id at the depth the old seal was at so the new one will be in the cement when you get it where you had the old one. If your seal driver drives the flat front & does not also have a shaft that goes inside the seal id I would pack the recess on the backside with vaseline to hold the spring in place as you drive it in. If the spring pops out during the install you wont know it but the seal id will not grip the axle firmly enough, other than that keep it straight & not cocked. live every 24 hour block of time like it's your last day on earth

Re: Changing 8 3/4 axle housing seal [Re: RapidRobert] #341770 06/08/09 11:16 PM 06/08/09 11:16 PM
Joined: Mar 2008 Posts: 571 Western NC 68Bullit OP mopar
68Bullit OP mopar Joined: Mar 2008 Posts: 571 Western NC	Okay Before I get started, would there be anywhere else to check for a leak that might not be coming from the seal? I was thinking the seal was leaking but where else could I check just to be sure? I've changed the centersection a few times recently and I've always been careful to not let the splines of the axle rub against the seal and slice it (that I know of anyway). And I've used the permatex stuff on both sides of the brake housing shield to help get a good seal around the base of the axle. I've got a good stream of a leak down the inside of the wheel/tire and onto the floor that if I keep driving will seemingly drain out all the fluid.....Thanks

Re: Changing 8 3/4 axle housing seal [Re: 68Bullit] #341771 06/08/09 11:40 PM 06/08/09 11:40 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I've got a good stream of a leak down the inside of the wheel/tire and onto the floor It's not brake fluid?. That large inner seal is what contains the gear lube so take care driving the new one in. the outer perimeter of the seal is it's strongest area so you want a driver with a large an OD as will fit in there. EDIT use a BFH as a lighter one will increase the chances of the seal cocking sideways. Once you get it started straight get it all the way there w as few whacks as possible Last edited by RapidRobert; 06/09/09 12:09 AM. live every 24 hour block of time like it's your last day on earth

Re: Changing 8 3/4 axle housing seal [Re: RapidRobert] #341772 06/09/09 07:53 AM 06/09/09 07:53 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: measure the depth of the old seal & drive the new one in to that depth and put a smear of gasket cement( You drive the new seal in till it stops against the stop lip in the housing. You can very simply use the axle itself to pull the inner seal by as you are pulling it out hold teh flange to the rear of the car letting the splined end rub on the front of teh housing and when you hit the seal give a prying action to the rear and the seal will come out on the end of the axle. Don't worry about the out seal in the retainer it wll leak if the inner seal leaks and the only time that one is replaced is when the bearing is replaced. It is mostly a dust seal to keep brake debrie out of the bearing area. Make sure to clean, inspect and repack the bearings with a good wheel bearing compatable grease. this is the only lubrication that they get. They are not lubricated from the rear axle lube. Make sure that you drive the new seal square and in with the metal face out.http://www.moparts.org/Tech/Archive/axle/12.html

Re: Changing 8 3/4 axle housing seal [Re: MoparforLife] #341773 06/09/09 08:22 AM 06/09/09 08:22 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	old seals are super easy to get to leak with a couple R&R of the axles you are careful but you might have knocked the spring off the back side of the seal going back in with an axle what they said pack the back side of seal around the spring on the seal lip drive it all the way in with as few wacks as possable check the axle for grooves were the axle rides also I rub a little bearing grease on the axle surface were the seal ride so its not dry on start up good luck

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