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Frank's T-case


 

Frank,
I'm sorry to say your T-case did not get done today. I removed the OD's
planetary gear and separated the tranny and T-case. Since I didn't follow
the directions on this separation the main shaft slipped out of the front
main gear and the pilot bearings took a tumble. You know what a fondness I
have for T-90s and before I knew it, it was completely disassembled and
cleaned.

Since I had it apart I figured I might as well give it a quick inspection
before I put it back together. Here is your needed parts list.

1 Small parts kit
2 Gasket kit
3 Front main bearing (Optional)
4 Rear main bearing (Optional)
5 Syncronizers (Marginal)
6 Reverse idler gear and shaft (One tooth broken 1/3 off and wobbles)
7 and of course the poppet springs and balls
This tranny is in very good condition. There is minimal wear on the cluster
gear's 1st gear ring. The first/reverse gear has very minor chips on both
faces. The front and rear surfaces of it are not very well machined so I
think it is after-market. The mainshaft and front main gear show no wear or
damage. Of course all of this was just a quick cursory inspection. I went
ahead and reassembled it so it would be easier to store until you're ready
for it.

I'll try to get to the t-case tomorrow if Momma allows it. It's awfully hot
outside and she won't let me bring greasy parts inside until I get them
clean. Go figure. :-) This means the tranny and AA V-8 adapter are stored
in the basement now. :-)

Rick S (TX)


 

Well Frank, I've got some good new and some bad news. I guess I'll start with
some of the good news first. The transfer case is cleaned up and dismantled
in the basement. Most parts appear to be in good shape although I think we
should throw a new set of bearings at it. Your intermediate shaft and
bearings will work just fine with this gear and your new caged bearings
should work with this shaft as well. Taking your other transfer case apart
though may ruin your new seals and gaskets. If you want I can go ahead and
order a new set of them and then if we don't need them in yours we can put
them in mine.

Now for the bad news. Take a look at this gear:

It is supposed to look like this:

Fortunately, these two gears are the same, even down to the part number. The
good one came out of the Dana 20, so it looks like it was good for something
after all :


Now for the rest of the bad news. This is the shaft that the gear rides on:

See the spalling on the shaft? It should look like this:

Now Frank, Before you get your hopes up, the shafts are not the same:

I don't know it this shaft can be traded out of your other case or not. I
would think the shafts were the same with just the gears being different, but
without yours here to compare it's hard to tell. All of the damage to the
shaft is added metal from the gear. I was out at Alvin Jackson Transmissions
this week and they were turning shaft that had the same kind of damage on a
lath. If you want, I can take this one out to him and have it turned. I
think it would be fine after that.

The rest of the T-case is in very good shape. I'm not sure yet what caused
the damage that you have but I'm looking into it.

I'll try to get back to you tomorrow.

Rick S (TX)


 

In a message dated 6/27/99 11:02:56 PM Central Daylight Time,
recary@... writes:

<<
Rick, What a neat way to do a service diagnosis! Now we can all share. I was
looking over your
shoulder here, and I noticed the worn gear seems to be without the holes or
grooves to allow oil
to lubricate the bearing surface of gear against shoulder of the shaft. Is
it worn away on the bad
gear? (One can't tell depth in the picture) Perhaps it's the cause of the
failure.

Reed (CA) >>

Reed, I believe it had the grooves when it was new because the part numbers
are the same and it's missing metal. I think the grooves just wore off.

At first glance I think something got trapped in there, but I'll have to look
a bit more before I make that choice.

Rick S (TX)


Reed Cary
 

Rick, What a neat way to do a service diagnosis! Now we can all share. I was looking over your
shoulder here, and I noticed the worn gear seems to be without the holes or grooves to allow oil
to lubricate the bearing surface of gear against shoulder of the shaft. Is it worn away on the bad
gear? (One can't tell depth in the picture) Perhaps it's the cause of the failure.

Reed (CA)

--- Rick48CJ2A@... wrote:
From: Rick48CJ2A@...

Well Frank, I've got some good new and some bad news. I guess I'll start with
some of the good news first. The transfer case is cleaned up and dismantled
in the basement. Most parts appear to be in good shape although I think we
should throw a new set of bearings at it. Your intermediate shaft and
bearings will work just fine with this gear and your new caged bearings
should work with this shaft as well. Taking your other transfer case apart
though may ruin your new seals and gaskets. If you want I can go ahead and
order a new set of them and then if we don't need them in yours we can put
them in mine.

Now for the bad news. Take a look at this gear:

It is supposed to look like this:

Fortunately, these two gears are the same, even down to the part number. The
good one came out of the Dana 20, so it looks like it was good for something
after all :


Now for the rest of the bad news. This is the shaft that the gear rides on:

See the spalling on the shaft? It should look like this:

Now Frank, Before you get your hopes up, the shafts are not the same:

I don't know it this shaft can be traded out of your other case or not. I
would think the shafts were the same with just the gears being different, but
without yours here to compare it's hard to tell. All of the damage to the
shaft is added metal from the gear. I was out at Alvin Jackson Transmissions
this week and they were turning shaft that had the same kind of damage on a
lath. If you want, I can take this one out to him and have it turned. I
think it would be fine after that.

The rest of the T-case is in very good shape. I'm not sure yet what caused
the damage that you have but I'm looking into it.

I'll try to get back to you tomorrow.

Rick S (TX)
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