User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 12-07-2019, 02:18 PM #16
JMat's Avatar
JMat JMat is offline
Member
 
Join Date: Feb 2013
Location: Reno, NV
Posts: 220
JMat will become famous soon enough
JMat JMat is offline
Member
JMat's Avatar
 
Join Date: Feb 2013
Location: Reno, NV
Posts: 220
JMat will become famous soon enough
Quote:
Originally Posted by BoomerBob View Post
These two statements conflict with each other. Only one can be true. It either did or didn't release pressure when you removed it. They can appear to be the same functionally but not in practice.
Sometimes when I change the fluid in the rear diff I've had the same thing happen to me and couldn't figure out how there could be pressure to be released. In my case I believe it was a slight vacuum and not pressure at all. These diff's build up heat in the summer(expanding the air) and release that pressure. Since these valves are only one way, when the temps drop a lot in the winter and the air inside the diff condenses it makes sense to me that it could leave a slight vacuum. When you open the thing up it may be hard to tell the difference. I always open the fill hole first to before I drain the diff to make sure it's not stuck and that's when I've heard this.
__________________
1998 Toyota 4Runner 3.4 4x4 with 340,000 miles.
199mm TBU-Bilstein 4600-'99 Tall Springs(Rear).Almost Totally Stock

1997 Toyota 4Runner 3.4 4x4 with 247k miles-Project car

Last edited by JMat; 12-07-2019 at 02:42 PM.
JMat is offline   Reply With QuoteReply With Quote
Old 12-07-2019, 04:20 PM #17
BoomerBob's Avatar
BoomerBob BoomerBob is offline
Member
 
Join Date: Jun 2019
Location: Arizona
Posts: 362
BoomerBob will become famous soon enough BoomerBob will become famous soon enough
BoomerBob BoomerBob is offline
Member
BoomerBob's Avatar
 
Join Date: Jun 2019
Location: Arizona
Posts: 362
BoomerBob will become famous soon enough BoomerBob will become famous soon enough
Quote:
Originally Posted by JMat View Post
Sometimes when I change the fluid in the rear diff I've had the same thing happen to me and couldn't figure out how there could be pressure to be released. In my case I believe it was a slight vacuum and not pressure at all. These diff's build up heat in the summer(expanding the air) and release that pressure. Since these valves are only one way, when the temps drop a lot in the winter and the air inside the diff condenses it makes sense to me that it could leave a slight vacuum. When you open the thing up it may be hard to tell the difference. I always open the fill hole first to before I drain the diff to make sure it's not stuck and that's when I've heard this.
I can see how that could happen on a one way valve which tells me this shouldn't be a one way valve. I get why it is; to keep water and dust out but it sounds like a simple breather filter that allowed air both ways would be better. For those who see a lot of mud, sand, and water or any combination of; an extension tube with the breather mounted someplace where those things can't get to it makes sense.

I've read of people drilling a hole so the tube vents inside the cab where it's always clean dry(ish) air.

__________________
2001 2wd - Daily Driver
BoomerBob is offline   Reply With QuoteReply With Quote
Reply

Tags
bearing , pressure , replaced , seal , time

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear Axle Seal: Axle Puller Tool Design nobb 3rd gen T4Rs 29 11-23-2019 07:39 AM
Rear axle seal failure question BlackRustBucket 3rd gen T4Rs 46 06-18-2017 09:21 PM
Rear Axle Failure Question Nuked Beaver Classic T4Rs 8 10-09-2014 05:20 PM
I think I've just had a rear axle seal failure!!! poleclimber63 3rd gen T4Rs 10 02-05-2013 11:48 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 08:54 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020