9.75 rear leaking fluid
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Tuned
Joined: Oct 2005
Posts: 341
Likes: 2
From: Bloomsburg,PA
9.75 rear leaking fluid
why does the local ford dealer tell me that i don't need a gasket on the 9.75 rear end?? anyway 2 months ago i changed the rear fluid used permatex ultra black RTV silicone gasket maker and now its starting to leak the cover and
housing are in great shape clean and dry
i guess i'll buy a sheet of gasket material and cut my own
whats the best gasket material to buy
housing are in great shape clean and dry
i guess i'll buy a sheet of gasket material and cut my own
whats the best gasket material to buy
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Make sure you put a bead of the RTV on both surfaces, let it set 10-15 minutes to get tacky, install and properly torque the bolts, then, if possible, let the truck sit overnight before adding the rear diff fluid.
Steve
Steve
Freshman User
Joined: Jun 2004
Posts: 29
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99 Ford Expy, have you got this fixed yet? I changed my diff fluid and used rtv, and can't get it to stop leaking. I was thinking of making a gasket like you mentioned and using rtv to see if it helps, but wanted to hear what you did to fix yours.
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Tuned
Joined: Oct 2005
Posts: 341
Likes: 2
From: Bloomsburg,PA
Originally Posted by Davez99Expy
99 Ford Expy, have you got this fixed yet? I changed my diff fluid and used rtv, and can't get it to stop leaking. I was thinking of making a gasket like you mentioned and using rtv to see if it helps, but wanted to hear what you did to fix yours.
Senior User
Joined: Oct 2004
Posts: 326
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From: North Alabama
Is the cover a 12-bolt? If so, Advance Auto Parts sells a gasket for that differential. It should be a "Trans-Dapt" brand Differential Cover Gasket Part #9056. AAP will probably have to order it, & could have it to you in 2 business days.
Elder User
Joined: Jul 2003
Posts: 746
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From: Salisbury, MD
Recently on the differential fluid changes on my Jeep i've used the Permatex Red RTV. I applied a bead on the differential and took my finger to spread it out, so there was a layer all the way around about 1/16" - 1/8" thick. I waited a few minutes and put the cover on. Waited 24 hours before putting fluid in. No leaks yet for me.
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