Transfer seal

[beanz2]

Originally Posted by Jimmy B

Is it ok to install the seal that the dealer is giving me,basicly it is a double lipped seal, if so then which way should the spring face ,tranny or transfer.The one in my case looks to me to be a upgraded design,I might give the local seal shop a call that I deal with at work and see if they can match the one in the case now,or suggest a good replacement.I even think 2 thinner single lipped seals installed face to face would work well.
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If the double lipped seal's diameters fit, use it. It might be another one of Toyota's running upgrades. What is the seal part number BTW?

A lot of seals Toyota makes (such as axle shaft seals) are double lipped, but with a single spring.

Dave

[Jimmy B]

Sorry Dave but I may be confusing everyone here,the seal that is in my case now is of a double lipped design but has 2 springs in it,one on the tranny side and one on the transfer side.According to the seal shop and with my experience-hydraulics,the stock seal(prt#90311-48012) that Toyota is providing,a double lipped single spring design is designed only to keep fluid on the side with the spring,for example if the spring was facing the transfer side and there was a build up of pressure in the tranny from say a plugged vent, the fluid would pass into the transfer case even if the seal is in good shape,the very small secondary lip on these double lipped seals is basicly a scrapper,for example to keep dirt from damaging the main sealing surface of the seal(where the spring is) on a wheel bearing seal.
With the single spring seal which way is the spring installed?, for me it would be toward the tranny since it is higher and the fluid would want to flow towards the transfer,just wondering how would the most common problem of the transfer filling the tranny can happen since the gear behind the seal on the transfer side would act as a slinger and throw the oil away from the seal.
The seal shop is unable to match the original seal I have.I have found a single lipped seal to duplicate the seal I have now by installing 2 face to face but I will have to narrow the outer flange to fit in the provided space,the stock seal is 10mm wide and the single lipped seals are 7mm wide each =14mm,I will have to narrow the outer flange of the new seals by 2 mm each to fit the provided space.Seem like overkill but peace of mind for me.
James.....

[beanz2]

You maybe right, the seal may have double springs looking at the FSM. I installed it with the lip toward the transfer. No leaks so far, no oil transfer. I'd double the seal if I had thought of it too

Dave

[David*BJ70]

When the fluid transfer between the Tranny and the T-Case occur, is that happen only after driving ? and then the fluid go slowly back in the T-Case.

So if the Cruiser did't move since two day, I can't detect the problem ?

The question is : Did I have to drive the Cruiser to see the problem ? or I can realize the problem after 2 days without driving it ?

Thank

[tlcruiserman]

Originally Posted by David*BJ70

When the fluid transfer between the Tranny and the T-Case occur, is that happen only after driving ? and then the fluid go slowly back in the T-Case.

So if the Cruiser did't move since two day, I can't detect the problem ?

The question is : Did I have to drive the Cruiser to see the problem ? or I can realize the problem after 2 days without driving it ?

Thank

I am pretty sure you need to drive it to tell, it has to do with the motion of spinning gears and shafts.

Michael

[2rivers]

A little late on this thread but timely thanks NorCal

not like I dont have any other vehicle-realted projects going, but I noticed on my last grease job that my transfer case on my HJ61 was dripping from the front output. I grabbed it and wiggled it saying to myself WTF and it went clunk clunk - way too much play for just the seal to have gone I think?? NorCal did you have that? Anyothers? Probably a bearing I am guessing? I was mystified by this becasue I thought this rig was hardly (if ever) in 4 wheel drive before I got it and wonder how it happened. But hey what do I know other than I think my luck can only improve.