|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-27-2023, 07:49 PM | #1 |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Differential Housing Vent
Hello,
Henry did not provide a vent for the differential on his lady. All rear ends I can recall always did include one, usually with the bolt that held the brake line distribution block to the housing. This prevented any pressure from building in the housing and pushing the lube through the seals, thought that it could not hurt.....I have added one to mine with the use of a street EL...Thoughts? |
10-27-2023, 08:17 PM | #2 |
Senior Member
Join Date: May 2010
Location: Southern California
Posts: 3,131
|
Re: Differential Housing Vent
There is enough volume in the axle housings and torque tube to dissipate any pressure build up. Some owners believe that if you install a Mitchell overdrive the reduction of volume can cause a pressure build up and an oil leak. A vent valve can be installed.
https://www.santaanitaas.org/wp-cont...ntial-Vent.pdf Tom Endy |
Sponsored Links (Register now to hide all advertisements) |
|
10-28-2023, 06:20 AM | #3 |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
I guess it can't hurt having one. Easy to add when unit down for overhaul without concerns of introducing steel chips to internals...
|
10-28-2023, 10:33 AM | #4 |
Senior Member
Join Date: Mar 2017
Location: Connecticut Shoreline
Posts: 1,824
|
Re: Differential Housing Vent
After 90 plus years why?
If it isn’t broken? Don’t fix it. Enjoy. |
10-28-2023, 10:45 AM | #5 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Differential Housing Vent
The issue I had, and Tom refers to, is when I installed my Mitchell O/D, it sealed off the Torque Tube. The Mitchell is vented but has sealed bearing on the shafts. Soon after installing the O/D, my rear end started leaking. Vented the axle tube and it stopped. My rear end didn't leak before.
So, take it for what it is worth. A stock Torque Tube wouldn't have this issue. FWIW, most if not all modern rear ends are vented. Last edited by Y-Blockhead; 10-28-2023 at 10:51 AM. |
10-28-2023, 11:24 AM | #6 |
Senior Member
Join Date: Sep 2022
Location: SoCal
Posts: 591
|
Re: Differential Housing Vent
Sponsored Links (Register now to hide all advertisements)
|
10-28-2023, 12:56 PM | #7 |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
|
10-28-2023, 01:02 PM | #8 |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
Very common on 50s and 60s domestic autos. I know that my 63 Olds has a hollow bolt being used to mount the distribution block and a neatly stamped cover to fit over the hole in the bolt. This acted as a baffle to provide pressure relief of the gear case but keep the water out.
|
10-28-2023, 01:11 PM | #9 | |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
Quote:
|
|
10-28-2023, 01:17 PM | #10 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Differential Housing Vent
Quote:
Last edited by Y-Blockhead; 10-28-2023 at 01:22 PM. |
|
10-28-2023, 02:24 PM | #11 | |
Member
Join Date: Sep 2016
Location: San Jose, CA
Posts: 47
|
Re: Differential Housing Vent
Quote:
https://www.secretsofspeed.com/diffy-vent |
|
10-28-2023, 05:28 PM | #12 |
Senior Member
Join Date: Jul 2015
Location: SouthWest Michigan
Posts: 363
|
Re: Differential Housing Vent
Over thinking it
It vents up thru the torque tube as long as u are still running it If you are running a open drive shaft Then yrs you will need an external vent Sent from my iPhone using Tapatalk |
10-28-2023, 06:49 PM | #13 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Differential Housing Vent
|
10-28-2023, 08:56 PM | #14 |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
The torque tube has a seal on the drive shaft also, just like the axle seals (2)
|
10-29-2023, 09:52 AM | #15 |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 3,472
|
Re: Differential Housing Vent
I have taken several rear axle assemblies and transmissions apart and many of them sat idle for decades. Typically there was condensation water in them. However, I find that running the car produces enough heat to avoid a serious amount of condensate accumulation. A vent would be advantageous, but I am not a fan of drilling a hole in an axle housing or torque tube. The transmission is vented, so condensation is not an issue for an active car. Drain the differential & transmission oils annually to rid condensation.
__________________
Bob Bidonde |
10-29-2023, 10:16 AM | #16 | |
Senior Member
Join Date: Jul 2023
Posts: 235
|
Re: Differential Housing Vent
Quote:
|
|
10-30-2023, 11:57 AM | #17 | |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,046
|
Re: Differential Housing Vent
Quote:
__________________
If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! |
|
10-30-2023, 12:09 PM | #18 |
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,089
|
Re: Differential Housing Vent
Originally any pressure was vented thru the torque tube, thru the seal which is pointed in such a way that air can go thru it and out the trans shift stick. When installing a Mitchel or other OD, then you need to vent the diff itself.
|
10-30-2023, 02:03 PM | #19 |
Senior Member
Join Date: Aug 2012
Posts: 886
|
Re: Differential Housing Vent
Dupe
__________________
The Master Cylinder Enjoying life at the beach in SoCal... |
10-30-2023, 02:07 PM | #20 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Differential Housing Vent
I just tried it on the left side of the banjo (looking toward the front). When that turned messy, I installed the vent of a modern on the left axle tube.
A lot of people install O/D and don't realize this. Maybe their axle seals leak enough to not have an issue. Mine started leaking soon after installation of my Mitchell. Last edited by Y-Blockhead; 10-30-2023 at 02:13 PM. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|