leaking 9 inch rear
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leaking 9 inch rear
Posted: February 29 2008 02:45 PM
 
cr shorter (aka cr55) [ View ] [ Email ] [ Car Ads ] [ Blogs ]
dover, Delaware

 ......CR
 
I have a nine inch ford rear out of an early mustang that leaks on all five bolts that hold the pinion gear. I have tried thread sealant but it hasn't helped. Any suggestions?
 
 
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Posted by blade58  -  02/29/2008 03:37 PM
Check for cracks with dye -pentrant
blade58 [ View ] [ Email ] [ Blogs ] [ Car Ads ] apopka, Florida
 
Posted by cr55  -  02/29/2008 04:16 PM
I'm not really sure how to do that .
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by Starfire  -  02/29/2008 05:02 PM
Before you start heading off in all sorts of directions check level of the lubricant fill and the vent on the axle. Oil leaks are often from too much oil in the assembly. You should find the vent just to the left of center of the housing when looking at the rear of the axle. If the vent is plugged pressure will build up and force gear oil out in places one doesn't even know are there. Any leakage evident at the axle ends or at the pinion seal?
Starfire [ View ] [ Email ] [ Blogs ] [ Car Ads ] Weimar, Texas
 
Posted by cr55  -  02/29/2008 04:46 PM
no leakage anywhere except the bolts on the pinion.
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by Starfire  -  02/29/2008 05:07 PM
Obviously cannot make a definitive analysis, but I would suspect the pinion seal may be the culprit even if it isn't leaking along the pinion gear shaft itself yet. Don't you just hate weird stuff going on?
Starfire [ View ] [ Email ] [ Blogs ] [ Car Ads ] Weimar, Texas
 
Posted by cr55  -  02/29/2008 05:54 PM
yeah I do!!! It's never anything easy.. I don't have any leaks on anything except the bolt heads on the pinion carrier. thanks for all the help too!
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by blksheep  -  02/29/2008 06:26 PM
I'm gonna suggest you use copper washers on those five bolts. I always use copper washers with the third member nylon lock nuts and that has eliminated the any leaks there. Just my $.02 worth..................


blksheep...in Charlotte
blksheep [ View ] [ Email ] [ Blogs ] [ Car Ads ] Charlotte, North Carolina
 
Posted by dixie  -  02/29/2008 07:16 PM
55 blksheep has got u covered,try what he said an it will go away.
jim grace [ View ] [ Email ] [ Blogs ] [ Car Ads ] dade city, Florida Charter Member since January 2006
 
Posted by Crazyhorse Rod Shop  -  02/29/2008 07:33 PM
blacksheep's right on this. get some crush washers.
dont poke the porchdog........he bites [ View ] [ Email ] [ Blogs ] [ Car Ads ] BLUFF DALE, Texas Charter Member since March 2003
 
Posted by cr55  -  02/29/2008 08:41 PM
I'm gonna try that. thanks for all the ideas!!!!! It's always embarassing to have a pool of oil under your car when you leave,and you can be assured that a street rod always draws lookeres.
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by 37tin  -  02/29/2008 11:20 PM
It's not really leaking, just marking it's territory..!! mine does, any new places I go.
37tin [ View ] [ Email ] [ Blogs ] [ Car Ads ] langley, Canada
 
Posted by cr55  -  03/01/2008 08:34 AM
I have a 48 harley panhead and thats what I tell everbody. because it definately marks it's spot!!!
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by hotrodgene  -  03/01/2008 09:22 AM
Check the vent
Thanks,Gene [ View ] [ Email ] [ Blogs ] [ Car Ads ] Saint Petersburg, Florida
 
Posted by srodder39  -  03/01/2008 09:25 AM
The five bolts go into blind holes making it difficult for fluid to travel up the threads and drip. If you remove the five bolts and pull the pinion out there is an oring that seals the flange if it is leaking fluid will be present on the bolts. Caution the metal shim that is on the face of the flange is not a gasket do not remove it. This is an easy procedure and will not affect the gear set up. I would recommend you clean the area of the leak and make sure it is not the seal leaking and fluid is blowing back to the pinion flange.
srodder39 [ View ] [ Email ] [ Blogs ] [ Car Ads ] santa fe, Texas
 
Posted by cr55  -  03/01/2008 10:06 AM
thanks for all the info guys. If I pull out the pinion carrier do I have to pull the axles too? Rears are not by speciality as you can tell. I don't think the seal is leaking because I don't have fluid all over. It mostly leakes when the car sits for a while.
......CR [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by srodder39  -  03/01/2008 01:07 PM
You do not have to pull the axles to remove the pinion carrier. Another place to check for a leak is behind the pinion nut . Fluid an leak down the spline of the pinion shaft and leak just behind the pinion nut. If this is the problem remove the yoke clean the spline and yoke and add a small amount of silicone and re install the yoke. Be sure to torq the pinion nut or count the turns it took to remove it and repeat on reinstall.
srodder39 [ View ] [ Email ] [ Blogs ] [ Car Ads ] santa fe, Texas
 
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