Transfer Case Input Gear Speedi-Sleeve?

[Mr. Toad]

The pic below is part no. 36212-60031, the transfer case input gear. The seal between the transmission and the transfer that often goes bad rides on this gear. When this seal/surface goes bad, the t-case oil gets pumped into the transmission.

Does anyone know what size speedi-sleeve to use to repair this surface?

 

[crushr]

I don't know what size it is, but it looks like SOR carries it (near bottom of page):

Specter Off-Road Land Cruiser Parts - Page 068 Land Cruiser Transfercase, Gaskets & Seals

 

[Pin_Head]

If it is a 4 speed gear, it is more likely that wear on the splines is pumping gear oil into the transmission and this has nothing to do with the seal. The splines are not sealed allowing gear oil to seep in, and when you go back and forth between drive and coast, the oil gets squeezed out in both directions. The 3 speed shaft doesn't wear like the fine splines on the 4 speed.

 

[Mr. Toad]

I don't know what size it is, but it looks like SOR carries it (near bottom of page):

Specter Off-Road Land Cruiser Parts - Page 068 Land Cruiser Transfercase, Gaskets & Seals

I think that's for the output seal surfaces (parking brake drum and front drive flange).

 

[Mr. Toad]

If it is a 4 speed gear, it is more likely that wear on the splines is pumping gear oil into the transmission and this has nothing to do with the seal. The splines are not sealed allowing gear oil to seep in, and when you go back and forth between drive and coast, the oil gets squeezed out in both directions. The 3 speed shaft doesn't wear like the fine splines on the 4 speed.

The seal surface in the pic isn't going back in my truck looking/feeling like that regardless whether the splines are worn.

But that said, how do you fix what you described short of replacing the gear and splines?

 

[crushr]

I think that's for the output seal surfaces (parking brake drum and front drive flange).

It appears you're right that it is for the front drive flange (nosecone).

 

[Living in the Past]

The seal surface in the pic isn't going back in my truck looking/feeling like that regardless whether the splines are worn.

But that said, how do you fix what you described short of replacing the gear and splines?

The only real fix is new tailshaft and input gear. Anyone looking for a used four speed really needs to take a good look at the tailshaft. Most have wear by now. Seems to be a problem with the split case transfer case four speeds with the nineteen spline tailshaft. But have never seen the three speeds with this problem.

 

[Mr. Toad]

Shaft pic. I don't think spline wear is my problem.

Anyone know whether Speedi-Sleeve 99165 or 99875 world work on the gear?

 

[Living in the Past]

The wear on the shaft looks as much as the wear on the gear where the seal rides. Remember the splines on your input gear are probably worn just as much making that amount double. You could just run a external line between the transmission and transfer case. You could also add a PTO gear. Splines behind the input gear might slow the oil transfer down a little bit.

 

[Mr. Toad]

The wear on the shaft looks as much as the wear on the gear where the seal rides. Remember the splines on your input gear are probably worn just as much making that amount double. You could just run a external line between the transmission and transfer case. You could also add a PTO gear. Splines behind the input gear might slow the oil transfer down a little bit.

The point of this project was to replace the external line work-around. lol. I suppose I should throw it all back together and run the junk.

Speedi-sleeve info, anyone?

 

[kiwidog]

input gear

Mr Toad,

Think Pinhead is correct. Any relative movement between the shaft and the gear acts like a pump. The high speed output gear bushing is probably worn as well adding to the rocking motion of the input gear on coast and drive.The seal surface looks pretty good from your picture. You can put the seal in, at a slightly different depth in the case and have the seal lip run on the undisturbed surface of the gear.
Have been meaning to try a product from the Belzona range of products. Products - Belzona Think with reasonably good shaft splines and reasonably good gear splines and some of the Belzona 1121 super metal it might take up the slack. ( good meaning slightly worn splines from from 30 or 40 years of use) Anybody try this stuff or have experience?
Have been thinking of doing write-up about the transfer case and all the little problems that they have. Gear noise, oil leaks etc. Basically how to blue-print a one piece transfer case. It would be good to get input from all the knowledge base out there, and compile a sticky to pass it on.

Thanks jb

 

[Mr. Toad]

Mr Toad,

Think Pinhead is correct. Any relative movement between the shaft and the gear acts like a pump. The high speed output gear bushing is probably worn as well adding to the rocking motion of the input gear on coast and drive.The seal surface looks pretty good from your picture. You can put the seal in, at a slightly different depth in the case and have the seal lip run on the undisturbed surface of the gear.
Have been meaning to try a product from the Belzona range of products. Products - Belzona Think with reasonably good shaft splines and reasonably good gear splines and some of the Belzona 1121 super metal it might take up the slack. ( good meaning slightly worn splines from from 30 or 40 years of use) Anybody try this stuff or have experience?
Have been thinking of doing write-up about the transfer case and all the little problems that they have. Gear noise, oil leaks etc. Basically how to blue-print a one piece transfer case. It would be good to get input from all the knowledge base out there, and compile a sticky to pass it on.

Thanks jb

Thanks kiwi. The gear's splines really don't seem to be worn at all. The shaft on the other hand has a wear "lip" that I can feel with my fingernail. Seems like maybe the gear was made of a harder material than the shaft.

It's the first real wear I've found anywhere on this cruiser. It's a '75 with about 63K actual miles on the odometer.

That product looks interesting.

Question though: Why would a "spline pump" send oil into the transmission one-way from the t-case rather than allowing two-way flow, even draining the transmission? Based on Pinhead, LIP, and your description of the problem, it would seem to "pump" in both directions, depending on whether you are transitioning to or from coasting...

 

[kiwidog]

MrT

Seeing you have a very low mileage machine. Spline wear may not be a really big part of the problem.
Couple of questions. When you pulled the seal did you examine the lip? Sometimes the seal can look OK, however when you bend it a little the lip will be cracked radially. That could be your leak.
You could polish the gear seal surface area with 220 grit wet/dry paper with a little varsol as lube.

The theory behind the pumping action, has to do with the recess inside the gear seal area. This part is inside the 4 speed case and exposed to the transmission oil. Oil gets inside the recess and the worn spline/shaft wear does the pumping action.
The oil level in the transmission is higher than the transfer case so gravity probably helps as well. Gears act to bring the oil up to the top shafts in both the transfer case and the transmission. I would think that at speed there is literally an oil storm going on in both the TC and the transmission.

When you go to reinstall the TC on the 4 speed it is not a bad idea to use a couple of long bolts with the heads cut off as guide dowels so you get the seal lined up with the input gear so it doesn't hang on the seal.

It would be nice if someone made a replacement input gear that had longer splines and smaller recess. There it quite a bit of output shaft spline area that is not contacting the spline area. Would be easy to make them longer. Always thought the Mr T could do an up-grade on the replacement part. The company that makes the the replacement gear for a 3 speed TC retro fit to a 4 speed Seamaster Taiyo Kiko Mfg Ltd could easily do it. Any suggestions.

Thanks jb

 

[HenryAZ]

Does anyone know what size speedi-sleeve to use to repair this surface?

For the sleeves I've had to use, I measure the shaft and look up the part number in the SKF catalog. Then off to Amazon, which has been the cheapest place I could find them.

SKF catalog

 

[Mark W]

Yep. just measure the shaft (snout on the gear in this case) and order the sleeve that way.

This looks to be a CR # 99169 by my measurements.


Mark...

 

[Pin_Head]

You can try a new seal, but I when I have done this, it didn't make any difference in moving gear oil into the tranny. Don't throw your bypass hose away.

 

[Mr. Toad]

Thanks for all the info, help and advice. Sucks that Toyota made something with such a critical and expensive weak point. True, the car is 36 years old, but it doesn't have a lot of miles on it... So here's where it's at/going:

1. The new seal is in and hopefully will do better than the old one.

2. Sleeve ordered for gear. 99165 is what I ordered before seeing Mark's post (99169). My measurement was 1.654", so either should work. But if the seal is not the problem, seems like it's not going to be super critical -- if it doesn't fit I'll use it to make donut holes. lol

3. I'll be sourcing a new hose to use with my M-A-F fittings on the return apparatus when I put it back on. I'd reuse the old blue hose that came with the kit, but it's brittle and cracked where it slides onto the fittings.