9" rear end oil
Thread Starter
1st Gear Member
Joined: Aug 2008
Posts: 56
9" rear end oil
I have a 9" tru trac. I noticed a small leak and noticed there's a small crack on the plate which the spring leafs sit on. That's getting taken care of but the oil smells really burnt. I want to change the oil but don't see any drain plug. How do you change oil and what kind of oil do I need?
5th Gear Member
Joined: Feb 2007
Posts: 2,688
From: Ramona, CA
Wow your bousing is cracked. That sucks. Are you removing it from the car to have it welxed shut and checed to see if its still straight? You can use 80-90 weight gear oil. I would check the true track wdbsite for reccomendations though.
3rd Gear Member
Joined: Aug 2010
Posts: 889
From: tn
Siphon gear oil out from fill hole w/ 3/8" clear tube. Once siphon started have lunch cause will take a while.
Measure rear end temp w/ IR after interstate driving.
My unit measured about 135F; fresh rebuild.
Measures 122F (32F ambient); lapped in.
If temp is approaching 200F then time to worry.
Measure rear end temp w/ IR after interstate driving.
My unit measured about 135F; fresh rebuild.
Measures 122F (32F ambient); lapped in.
If temp is approaching 200F then time to worry.
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2nd Gear Member
Joined: Mar 2006
Posts: 204
From: Texas
Rear end oil smells real bad, that's normal.
Jack the rear end up and put it on jack stands. Remove wheel and hub. There are 4 3/8 bolts (9/16 wrench) that hold the axel and backing plate to the rear end housing. Remove the 4 bolts, be carefull not to tear the gasket, move the axel out a few inches, no need to pull it all the way out, unless you just want to.
Dissconect drive shaft from rear end. There are 10 nuts that hold the rear end center section to the housing, remove the nuts and pry the center section lose from the housing, when you do this oil will come out, Really nasty smelling oil. when you pry the center section away from the housing do it up past mid point on the center section, in case you gouge the housing it wont leak. Get what ever oil tru trac recommends and a 9 inch gasket. After you get all the old oil out and throw the cloths away that got any of that oil on. Pull the center section all the way out to get all the old gasket off the housing and the center section.
Re install, put the gasket on the housing studs. remove the square 3/8 or 1/2 inch drive plug that is in the center section, (this is were you fill the rear end with oil.)
Install the center section into the housing, tighten bolts according to torque specs ( I just use a 3/8 drive and can't tighten them to tight).
Reinstall axel and backing plate, ( you can reuse this gasket if you don't tear it). Get at least 3 gts of oil. (It will probably only use 2 gt.s) Fill the center section threw the plug hole until the oil runs out, install the plug, reattach drive shaft, wheels & hubs, lift car from jack stand and put car on the ground, go have 2 beers.
Jack the rear end up and put it on jack stands. Remove wheel and hub. There are 4 3/8 bolts (9/16 wrench) that hold the axel and backing plate to the rear end housing. Remove the 4 bolts, be carefull not to tear the gasket, move the axel out a few inches, no need to pull it all the way out, unless you just want to.
Dissconect drive shaft from rear end. There are 10 nuts that hold the rear end center section to the housing, remove the nuts and pry the center section lose from the housing, when you do this oil will come out, Really nasty smelling oil. when you pry the center section away from the housing do it up past mid point on the center section, in case you gouge the housing it wont leak. Get what ever oil tru trac recommends and a 9 inch gasket. After you get all the old oil out and throw the cloths away that got any of that oil on. Pull the center section all the way out to get all the old gasket off the housing and the center section.
Re install, put the gasket on the housing studs. remove the square 3/8 or 1/2 inch drive plug that is in the center section, (this is were you fill the rear end with oil.)
Install the center section into the housing, tighten bolts according to torque specs ( I just use a 3/8 drive and can't tighten them to tight).
Reinstall axel and backing plate, ( you can reuse this gasket if you don't tear it). Get at least 3 gts of oil. (It will probably only use 2 gt.s) Fill the center section threw the plug hole until the oil runs out, install the plug, reattach drive shaft, wheels & hubs, lift car from jack stand and put car on the ground, go have 2 beers.
5th Gear Member
Joined: Feb 2007
Posts: 2,688
From: Ramona, CA
I think everyone is missing the fact that your axle tube is cracked through at the spring perch weld. You should probably get that checked out and re welded. Unless you think that it will be ok for the future and hold up to your driving then just get some jb weld.. clean up the area and paste it on the crack.. no more leak.
Thread Starter
1st Gear Member
Joined: Aug 2008
Posts: 56
I think everyone is missing the fact that your axle tube is cracked through at the spring perch weld. You should probably get that checked out and re welded. Unless you think that it will be ok for the future and hold up to your driving then just get some jb weld.. clean up the area and paste it on the crack.. no more leak.
3rd Gear Member
Joined: Aug 2010
Posts: 889
From: tn
Rear end oil smells real bad, that's normal.
Jack the rear end up and put it on jack stands. Remove wheel and hub. There are 4 3/8 bolts (9/16 wrench) that hold the axel and backing plate to the rear end housing. Remove the 4 bolts, be carefull not to tear the gasket, move the axel out a few inches, no need to pull it all the way out, unless you just want to.
Dissconect drive shaft from rear end. There are 10 nuts that hold the rear end center section to the housing, remove the nuts and pry the center section lose from the housing, when you do this oil will come out, Really nasty smelling oil. when you pry the center section away from the housing do it up past mid point on the center section, in case you gouge the housing it wont leak. Get what ever oil tru trac recommends and a 9 inch gasket. After you get all the old oil out and throw the cloths away that got any of that oil on. Pull the center section all the way out to get all the old gasket off the housing and the center section.
Re install, put the gasket on the housing studs. remove the square 3/8 or 1/2 inch drive plug that is in the center section, (this is were you fill the rear end with oil.)
Install the center section into the housing, tighten bolts according to torque specs ( I just use a 3/8 drive and can't tighten them to tight).
Reinstall axel and backing plate, ( you can reuse this gasket if you don't tear it). Get at least 3 gts of oil. (It will probably only use 2 gt.s) Fill the center section threw the plug hole until the oil runs out, install the plug, reattach drive shaft, wheels & hubs, lift car from jack stand and put car on the ground, go have 2 beers.
Jack the rear end up and put it on jack stands. Remove wheel and hub. There are 4 3/8 bolts (9/16 wrench) that hold the axel and backing plate to the rear end housing. Remove the 4 bolts, be carefull not to tear the gasket, move the axel out a few inches, no need to pull it all the way out, unless you just want to.
Dissconect drive shaft from rear end. There are 10 nuts that hold the rear end center section to the housing, remove the nuts and pry the center section lose from the housing, when you do this oil will come out, Really nasty smelling oil. when you pry the center section away from the housing do it up past mid point on the center section, in case you gouge the housing it wont leak. Get what ever oil tru trac recommends and a 9 inch gasket. After you get all the old oil out and throw the cloths away that got any of that oil on. Pull the center section all the way out to get all the old gasket off the housing and the center section.
Re install, put the gasket on the housing studs. remove the square 3/8 or 1/2 inch drive plug that is in the center section, (this is were you fill the rear end with oil.)
Install the center section into the housing, tighten bolts according to torque specs ( I just use a 3/8 drive and can't tighten them to tight).
Reinstall axel and backing plate, ( you can reuse this gasket if you don't tear it). Get at least 3 gts of oil. (It will probably only use 2 gt.s) Fill the center section threw the plug hole until the oil runs out, install the plug, reattach drive shaft, wheels & hubs, lift car from jack stand and put car on the ground, go have 2 beers.
Why not siphon lube out?