H55F T-case output

[Malahki]

So I am experiencing the growling common with using 4 wheel drive at higher speeds, with my 1989 BJ74 (OME lift and extended shackles)

I had my t-case rebuilt about 40 000kms ago with all new bearings. I have kept my front hubs locked in the last two winters, using 4Hi when necessary. Approximately 10 000km have been run this way with no problems or noise.

I just had the front driveshaft balanced and new U-joints installed. While it was out I tried running with my hubs locked in and their was no noise at all.

So I am assuming the issue is with the front output bearing on the T-case. When it was rebuilt the mechanic left out the little oil slinger washer thingy pictured below. Is this my problem? has it effected the preload on the output bearing??

I have a new bearing and seal to put in but not sure how this oil slinger should be situated or how to set up or determine the preload on the bearing??

You'll also notice in the pics that the oil slinger is a little rusty and has a couple bent tabs on the inside. Should I just clean it up, straighten it out and run it or try and find a new one?

 

[77cruiser77]

Why did he leave it out? Why did he not take it apart and install it? I certainly hope laziness did not prevail. Toyota designed it to need the slinger so yes it should be there and yes you should put it back. I do not see why it would not be the cause of your problems

 

[kbushnz]

The oil slinger is required.....without it the gears / bearings may be in the wrong position as it also acts like a small spacer.
Download a manual from Toyota Workshop & Repair Manuals - Page: 2
Then you can see where it goes and get all the preload info.
The transfercase is common across several models...

 

[Radd Cruisers]

Some transfer cases have that oil slinger and some do not. The later ones, afaik, all came with it.

The front output bearing is a ball bearing, and as such it has no preload.


~John

 

[Malahki]

I wonder; did Toyota add the oil slinger in later years to help with a poor lubricating issue on the output bearing?

Perhaps my issue is a result of poor lubrication.

John have you seen it being an issue with the older units? Or is it more designed to deflect oil away from the seal?

 

[Radd Cruisers]

My feeling is that the oil slinger has more to do with preventing the seal from being overloaded with oil, and keeping the oil moving than with lubrication of the bearing.

There are more problems with the front seal seeping oil slowly over time from the front driveshaft just sitting and doing nothing, than anything else. That same lack of use can also cause some problems with these bearings - pitting from the balls sitting in one location for a prolonged period of time - but that is not so common.

A small amount of rust on unfinished steel parts is an indication of water contamination - which is fairly common if you spend any time doing water crossings, drive in deep mud, or like racing through puddles.

If you like playing in a wet environment, you should be doing more frequent fluid services on your vehicle, and repacking wheel bearings and knuckles more frequently.

It is quite important to make sure that your transfer case is vented properly - the small vent at the top of the transfer case should be replaced with a barbed fitting a short section of hose to run the vent up to a higher point.

~John