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htn123

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Discussion starter · #1 · (Edited)
Hi guys,
I have been reading about quite a few threads about rearend diff. I have 04 SE 4X2. Here is my rear end diff pic. I has checked the fluid level and have added some.

Is my diff looks bad? should I go a head and get the 05 diff and change it myself? or wait? Notice the rust on the upper left of diff... point of concern?

I do tow my boat, 19ft so it's about 4000lbs. Not too far, about 15 miles from the house, but pretty often, once a week.
Any suggestion/comments?

Thanks.
 

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htn123 said:
Hi guys,
I have been reading about quite a few threads about rearend diff. I have 04 SE 4X2. Here is my rear end diff pic. I has checked the fluid level and have added some.

Is my diff looks bad? should I go a head and get the 05 diff and change it myself? or wait? Notice the rust on the upper left of diff... point of concern?

I do tow my boat, 19ft so it's about 4000lbs. Not too far, about 15 miles from the house, but pretty often, once a week.
Any suggestion/comments?

Thanks.
Well, I'd at least have my dealer take a look at it. Some people here who have experienced their diff cover rusting have had dealers who were willing to re-paint or replace the cover under warranty. A few folks have gotten the finned, '05 cover out of the deal.

It looks as though your diff either overheated really bad once or has been overheating somewhat consistently for a long period of time. Since you added fluid, it may have actually solved the overheating problem. What weight gear oil did you use? I'm still running 80W90 because the specification hadn't been released when I changed it out but the new spec is 75W140 SYNTHETIC.

Good Luck, and I'd definitely have my dealer take a look at it. Who's to say there's not more damage than meets the eye.
 
BLWedge09 said:
Well, I'd at least have my dealer take a look at it. Some people here who have experienced their diff cover rusting have had dealers who were willing to re-paint or replace the cover under warranty. A few folks have gotten the finned, '05 cover out of the deal.

It looks as though your diff either overheated really bad once or has been overheating somewhat consistently for a long period of time. Since you added fluid, it may have actually solved the overheating problem. What weight gear oil did you use? I'm still running 80W90 because the specification hadn't been released when I changed it out but the new spec is 75W140 SYNTHETIC.

Good Luck, and I'd definitely have my dealer take a look at it. Who's to say there's not more damage than meets the eye.

The rust and paint chipping is not heat related. :rolleyes:
 
titan4x4extreme said:
The rust and paint chipping is not heat related. :rolleyes:
While sometimes it is not, It certainly can be. Many members have had diffs overheat and cause the paint to bubble. It subsequently flakes/chips off and the exposed metal begins to rust. The rusting is exaggerated by the constant heat cycles in the same way that brake rotors form rust quickly after use and exposure to moisture. The difference is that the rust on brake rotors is instantly removed the first time you drive the truck again. The diff however, will continue to build up rust until something is done about it.

The cause is not always heat related. Obviously it could have been chipped by a rock or something. This is doubtful though, since the diff cover faces the rear of the vehicle and it would be hard to have something strike it very hard unless you're doing a lot of off roading in reverse. The heat cycles the diff goes through most certainly will cause the problem to progress however.

Obviously, it could have just had a crappy paint job in the first place, but if it were my diff, I'd have it checked out.
 
BLWedge09 said:
While sometimes it is not, It certainly can be. Many members have had diffs overheat and cause the paint to bubble. It subsequently flakes/chips off and the exposed metal begins to rust. The rusting is exaggerated by the constant heat cycles in the same way that brake rotors form rust quickly after use and exposure to moisture. The difference is that the rust on brake rotors is instantly removed the first time you drive the truck again. The diff however, will continue to build up rust until something is done about it.

The cause is not always heat related. Obviously it could have been chipped by a rock or something. This is doubtful though, since the diff cover faces the rear of the vehicle and it would be hard to have something strike it very hard unless you're doing a lot of off roading in reverse. The heat cycles the diff goes through most certainly will cause the problem to progress however.

Obviously, it could have just had a crappy paint job in the first place, but if it were my diff, I'd have it checked out.
IT's a manufacturing problem and not heat related. All Danas I have seen have rusted. Look at Fords, they are rusting. And its not caused by heat. I put Amsoil in mine right away at 500 miles and it still rusted and it has not gotten hot per my temp readings.
 
titan4x4extreme said:
IT's a manufacturing problem and not heat related. All Danas I have seen have rusted. Look at Fords, they are rusting. And its not caused by heat. I put Amsoil in mine right away at 500 miles and it still rusted and it has not gotten hot per my temp readings.
As a new member here, you should realize that this issue has been discussed here more times than I care to count.

Few examples from a simple search:

http://www.titantalk.com/forums/showthread.php?t=18216

http://www.titantalk.com/forums/showthread.php?t=22562&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=20980&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=16609&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=12149&highlight=Diff+heat

While you have every right to have your own opinion about this issue, your conclusion that there is no overheating problem is wrong. Your Titan may not have an overheating problem....neither does mine in fact. I changed the diff fluid out early and hopefully avoided it. I didn't post on this thread to start an argument with you. I responded to hopefully notify the original poster of a problem that has been well documented here. Please utilize the search feature before you crown yourself the expert on this subject.
 
titan4x4extreme said:
IT's a manufacturing problem and not heat related. All Danas I have seen have rusted. Look at Fords, they are rusting. And its not caused by heat. I put Amsoil in mine right away at 500 miles and it still rusted and it has not gotten hot per my temp readings.

I have 23,000 miles on my truck and it's still painted. Sooooo You both may be right.

The interesting thing here is the guy admitted that his fluid level was low, Sooooo....?
 
I have been here since early January. So I am not a new member. And I know more about the subject than you. The Titan rear diff is overheating due to low fluid. If you put good fluid in there it won't overheat. The paint on the other hand is a different issue all together and is not related to the heat but a manufacturing problem with the paint on the cover itself.

BLWedge09 said:
As a new member here, you should realize that this issue has been discussed here more times than I care to count.

Few examples from a simple search:

http://www.titantalk.com/forums/showthread.php?t=18216

http://www.titantalk.com/forums/showthread.php?t=22562&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=20980&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=16609&highlight=Diff+heat

http://www.titantalk.com/forums/showthread.php?t=12149&highlight=Diff+heat

While you have every right to have your own opinion about this issue, your conclusion that there is no overheating problem is wrong. Your Titan may not have an overheating problem....neither does mine in fact. I changed the diff fluid out early and hopefully avoided it. I didn't post on this thread to start an argument with you. I responded to hopefully notify the original poster of a problem that has been well documented here. Please utilize the search feature before you crown yourself the expert on this subject.
 
Discussion starter · #9 · (Edited)
Well, I added the fluid the very first week I got the truck 7/04. When the paint was still fresh and there was no visual heat spot. And I used the Synthetic 75W90.

Sounds like I should take it in for an inspection at least. Don't want my truck to break in the middle of the road.
Thanks guys.
 
go for a new aluminium cover.......

Mine came a little rusty too....I brushed it and used gloss black rustoleum early on.....it is still on like new at 9K miles. The new aluminium cover is a good ugrade for sure. I'd try to get the dealer to replace it.....or just buy a new aluminium cover.
Peace-Tom :cheers: gaelic ale :cheers:
 
The truth. I really think that since you have a boat when you get to the boat ramp the diff is hot. Then you submerge the diff in water and man what a fast cool down. This hot cold cycle has toasted the paint.?

Seems logical. Maybe I'll take some painted metal, heat it up then dump it in a pan of water and see how the paint reacts after a bunch of cycles. On second thought Naaaa! :cheers:
 
Squid said:
The truth. I really think that since you have a boat when you get to the boat ramp the diff is hot. Then you submerge the diff in water and man what a fast cool down. This hot cold cycle has toasted the paint.?

Seems logical. Maybe I'll take some painted metal, heat it up then dump it in a pan of water and see how the paint reacts after a bunch of cycles. On second thought Naaaa! :cheers:
Sounds logical. I guess squids know a lot about..... oh nevermind.
 
BLWedge09 said:
Sounds logical. I guess squids know a lot about..... oh nevermind.

You and I know that these diffs have overheated. We took care of ours so everyone else with a 04 can do the same or suffer the consequencs. I wouldn't have dumped my Diff fluid at 1K if I didn't believe there was a problem.

I also have a list of members and things I predict they will suffer with down the road. Some predictions have already come to pass.
 
My diff cover looks exactly the same as the photo. My oil did overheat. I took it to the stealership because I could smell the burning oil anywhere around the rear of the vehicle. (STRONG!) They checked the diff, said it was ok, but the fluid stunk, and was jet black...and they changed it. I asked for synthetic oil, but they would only put in the reg oil. (prior to TSB)
 
titan4x4extreme said:
I have been here since early January. So I am not a new member. And I know more about the subject than you. The Titan rear diff is overheating due to low fluid. If you put good fluid in there it won't overheat. The paint on the other hand is a different issue all together and is not related to the heat but a manufacturing problem with the paint on the cover itself.
By the way, go ahead and believe what you want. You're arguments don't even match up with what I am saying. While there may be a manufacturing problem concerning the paint on the cover, the HEAT caused by an underfilled diff most certainly will exaggerate the problem. Heat causes metal to expand thus over time causing the paint to either crack or expand with it and eventually cause bubbles. The paint tends to not contract back to the original size and shape when cooled down as the diff cover does. Eventually, the paint is no longer bonded to the cover and flakes off, thus exposing the metal to conditions cundusive to rust. Now, granted a normal diff that's not OVERheating will probably do this over time as well, an overheating diff will do it much faster. Now maybe that's not the problem in this case...I have no way of knowing just as you have no way of knowing either. For all I know that cover could have never even been painted. It wouldn't be the weirdest thing I've heard on here. Thant being said, it's beyond me why you would suggest to someone that there is nothing wrong when there have been many documented cases of people on this forum who have actually had problems. A simple trip to the dealer to have it checked out isn't going to hurt a thing. It's always better to be on the safe side.

And as far as the new member thing goes.....Look at your join date as listed in your profile....or directly to the left of your posts for that matter. According to that you've been a member since April 1, 2005....a whopping 1,2,3 days. Now, even if you've been lurking as a guest for a while you'd still be classified as a NEW MEMBER. Not a new user......new member. Maybe you re-registered with a new username...I don't know. Actually I don't care. I want as many new members as we can get here. Many new members have come along and posted some great information in their first post. I'm not knocking new members. But you should look around and see the general concensus on an issue before you waltz in and tell everybody that they're wrong. There are experts in just about any field you could imagine here and we try to take all the information and form a consensus.

One last thing, the "I know more about the subject than you" remark. That's completely uncalled for. For all I know you could be 8 years old and running back and forth asking your Daddy questions and posting what he told you. I don't believe that's true but I have no way of knowing. Just as you have no way of knowing anything about me. I know a lot more about the subject than you might think. Maybe you do know more. If that's true...well then good for you. My only problem is with the "What I Say is Right and what you say is Wrong" attitude you've been displaying. Listen to more than one side of things. You'll learn a lot more that way.
 
Damn! I always wondered how this here internet worked. Thanks.

I guess that's what people mean when they say, "the internet will make ya smart."

And just think my Mom said I'd never amount to much, and today I find out I'm an expert. WOO! WOO! :rockon
 
My rear diff looked fine until I was towing and the temps started hitting 250 degrees +. The paint started flaking off the day that occured and it now looks like htn123's except for the oil leakage around the fill plug.

There is no doubt the heat caused mine to get started.
 
Squid said:
Damn! I always wondered how this here internet worked. Thanks.

I guess that's what people mean when they say, "the internet will make ya smart."

And just think my Mom said I'd never amount to much, and today I find out I'm an expert. WOO! WOO! :rockon
I haven't exactly figured out your expertise yet.
 
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