Front diff over fill???? Log Out | Topics | Search
Moderators | Register | Edit Profile

DiscoWeb Bulletin Board » Message Archives » 2004 Archives - Discovery Technical » Archive through January 14, 2004 » Front diff over fill???? « Previous Next »

Author Message
 

Scott Ritzer (Truck603)
New Member
Username: Truck603

Post Number: 37
Registered: 07-2003
Posted on Sunday, January 11, 2004 - 03:38 pm:   Edit Post Delete Post Print Post

Can you do any damage by over filling the diff's?
 

Steve Cooper (Scrover)
Senior Member
Username: Scrover

Post Number: 638
Registered: 09-2002
Posted on Sunday, January 11, 2004 - 04:01 pm:   Edit Post Delete Post Print Post

How can you over-fill the diffs?

SC
 

Pugsly (Pugsly)
Senior Member
Username: Pugsly

Post Number: 256
Registered: 11-2002
Posted on Sunday, January 11, 2004 - 05:08 pm:   Edit Post Delete Post Print Post

That's a good question Steve, I'm not sure how to overfill a diff. I've always filled it until it got up to the level of the fill plug and then put the fill plug back in. Is there some other way to do it?
 

Scott Ritzer (Truck603)
New Member
Username: Truck603

Post Number: 38
Registered: 07-2003
Posted on Sunday, January 11, 2004 - 05:56 pm:   Edit Post Delete Post Print Post

Ok, stupid I know. I rotated my tires and had the front on stands. Looking at the front diff I decided it was a good time to change the fluid. Keep in mind it is still up, I drained and filled as normal but when I was finished I realized I had pumped way too much in. Set the truck down and now you know the story. I went on to do the rear with out it on stands. That is is how you over fill a diff. It may be a 1/2 quart over.
 

Matt Anderson (Disco01)
Member
Username: Disco01

Post Number: 134
Registered: 10-2003
Posted on Sunday, January 11, 2004 - 06:39 pm:   Edit Post Delete Post Print Post

Man, if you are worried just pop the fill plug out while parked on level ground and let any excess flow out. When it quits dripping it is perfect.
 

thom mathie (Muskyman)
Senior Member
Username: Muskyman

Post Number: 536
Registered: 11-2002
Posted on Sunday, January 11, 2004 - 07:28 pm:   Edit Post Delete Post Print Post

yes you can over fill diffs

and yes you can cause damage

places like jiffy lube that use air powered fluid pumps can very easily over fill them by pumping and pumping . the thick fluid will not really bleed out around the gun tip as the guy pumps.

then when the diff heats up and the fluid starts to expand and out gas it will put pressure on the seals causing the seals and breather to leak.

plus if you have a ARB it can ruin your selonoids and air compressor. because the fluid pushed up the breather will often plug the breather and then start pushing the fluid past the o rings and up the high prssure lines that activate the locker.

Morel= level surface and only fill till the fluid runs out to level with the bottom of the fill hole.

MM
 

Perry Ray Miller (Discojunky)
Member
Username: Discojunky

Post Number: 42
Registered: 03-2003
Posted on Sunday, January 11, 2004 - 07:35 pm:   Edit Post Delete Post Print Post

The manual sez 1.8 quarts and that won't reach the fill hole. I put 2 qts in and it still did'nt reach the hole. Which makes me feel like I am underfilling it because I always put in the oil til' it is equal to the fill hole. For what it worth.
 

thom mathie (Muskyman)
Senior Member
Username: Muskyman

Post Number: 538
Registered: 11-2002
Posted on Sunday, January 11, 2004 - 07:40 pm:   Edit Post Delete Post Print Post

sometimes a slight over fill is good

when you have turned the pinions up with a big lift they dont get as much lubrication, so a slight over fill will help get fluid "up" to the pinion bearing.

if you plan to do this add a larger breather system to prevent the above mentioned problems
 

Phillip Perkinson (Rover4x4)
Senior Member
Username: Rover4x4

Post Number: 624
Registered: 02-2003
Posted on Monday, January 12, 2004 - 10:26 am:   Edit Post Delete Post Print Post

I have heard it was a good idea to over fill the t-case...

Topics | Last Day | Last Week | Tree View | Search | User List | Help/Instructions | Program Credits Administration