Removing The Transfer Case (TC)

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Once the jack/cradle are in place, tap the TC flange with a lead hammer to separate from the transmission. Once it separates a little, grab it and pull it off the transmission output shaft. This requires pulling the TC away from the transmission about 2 to 3-inches. Once off, remove any unconnected electrical connectors and lower the TC and slide from under the truck and enjoy your favorite cold beverage.

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Reinstall in the reverse order. With the TC out, this is a good time to clean up your wiring harnesses. Mine were trashed and I replace the sheathing on everything I could reach. I also cleaned the underside of the truck so I can more easily spot future leaks.

TIME:

It took me about 2-1/2 hours to completely remove the TC. But, I had to figure it out as I went along and had to weld up my cradle which took a little time too. I think I could shave an hour off the time in the future, which is not bad overall. With a buddy helping, this would be a pretty quick job. A lot of time is wasted climbing in and out from under the truck and extra set of hands would be a huge help in time savings.

MISC:

I replaced the input and output shaft seals and the transmission output seal. The front was not leaking but I did it while I had it apart. There are several posts on the doing the rear output seal. The front seal is basically the same. The snap rings/c-clips are a major PITA. You will become and expert by the time you are done. Get yourself one or two pair of good snap ring/c-clip pliers, it can't be done without them. Also, the front cannot be done without a press, bearing splitter and bearing pullers. I had to pull the drive clutch hub, press the shaft off the bearing, and had to press the shaft back onto the bearing and press the drive clutch hub on as well. I also replaced the dust seals and found I could not tap them on with a hammer. So I used the press for this as well. None of this is difficult (except for the c-clips) you just need the right tools. Also, if you do the front output shaft, make sure that you lock the center diff before you remove the TC. This is necessary because it is difficult to fully seat the front output shaft in the clutch sleeve unless it is in the locked position.
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Thank you very much for this. I’ve got a JDM 94 and my transmission output is leaking. I am hoping it’s a very similar process. Did you use any special tools to pull the transmission output seal off?
 
Thank you very much for this. I’ve got a JDM 94 and my transmission output is leaking. I am hoping it’s a very similar process. Did you use any special tools to pull the transmission output seal off?

My hands, slides off easily if fully supported and your jack is on wheels.
 
My hands, slides off easily if fully supported and your jack is on wheels.
Oh ok, you didn’t need a seal puller or anything to get it out? Will be dropping the TC to replace the transmission output seal and the TC input seal. To my understanding they are the same part.
 
Oh ok, you didn’t need a seal puller or anything to get it out? Will be dropping the TC to replace the transmission output seal and the TC input seal. To my understanding they are the same part.

Oops..., thought you meant the TC itself.
The seal is in a removable flange. Unbolt the flange and tap the seal out. I will look for photo.
 
IMG_6847.webp
 
Just wanted to follow up on this thread in case someone does this to their JDM 94 FZJ80. I am starting this process and will do it over the next several days.

Day 1: I removed the TC skid plate and the TC fluid. Next I removed the rear driveshaft. Was pretty tricky to get a breaker bar in there but not impossible. I really didn’t want to disconnect the driveshaft from the rear differential so I just wiggled it off. This took a minute as the fit is tight. I pried it off using a flat head screw driver. I’ll update tomorrow as a progress.
 
Just wanted to follow up on this thread in case someone does this to their JDM 94 FZJ80. I am starting this process and will do it over the next several days.

Day 1: I removed the TC skid plate and the TC fluid. Next I removed the rear driveshaft. Was pretty tricky to get a breaker bar in there but not impossible. I really didn’t want to disconnect the driveshaft from the rear differential so I just wiggled it off. This took a minute as the fit is tight. I pried it off using a flat head screw driver. I’ll update tomorrow as a progress.
Day 2: I didn’t have as much time today but I did manage to get the front drive shaft nuts removed. Didn’t have time to take the drive shaft off. I’ll be doing that tomorrow as well as hopefully bolts 4 and 5.

Pro tip: when removing the drive shaft of the bolts are difficult to reach out the TC in neutral as well as the transmission and slowly roll the car. Then put the parking brake on and the put the TC in gear. This will make the bolts very easy to access. I am embarrassed to say I fought with extensions before realizing this.
 
Day 2: I didn’t have as much time today but I did manage to get the front drive shaft nuts removed. Didn’t have time to take the drive shaft off. I’ll be doing that tomorrow as well as hopefully bolts 4 and 5.

Pro tip: when removing the drive shaft of the bolts are difficult to reach out the TC in neutral as well as the transmission and slowly roll the car. Then put the parking brake on and the put the TC in gear. This will make the bolts very easy to access. I am embarrassed to say I fought with extensions before realizing this.
Another Option- place up on jacks under the axles and turn the wheels.

Additionally, the other benefit here is you can remove the transmission cross member lower the assembly with jacks ( used a HF 3ton and their cheap transmission jack) and that softens the angle of the joint at the rear for access.
 
Not sure how far of a tear down your doing, but before you reassemble and seal down the CDL motor, make sure you place the internal components in the position that you took it out in: IE, H or L range. There is discussions on here that recommend placing in N. I did not do that, but have no understanding as to the why. Someone smarter than me can answer that lol

Made and edit as I misremembered a post that I even responded too….🙃….
 
Not sure how far of a tear down your doing, but before you reassemble and seal down the CDL motor, make sure you place the internal components in the position that you took it out in: IE, H or L range. There is discussions on here that recommend placing in N. I did not do that, but have no understanding as to the why. Someone smarter than me can answer that lol

Made and edit as I misremembered a post that I even responded too….🙃….
This is good advice. When I put my transfer case back together I thought I understood which way the CDL gear was supposed to be and wouldn't ya know it, I had it reversed. Fortunately was able to lower the crossmember a small amount to remove the CDL actuator. Which I then actuated and reinstalled. Problem solved.
 
This is good advice. When I put my transfer case back together I thought I understood which way the CDL gear was supposed to be and wouldn't ya know it, I had it reversed. Fortunately was able to lower the crossmember a small amount to remove the CDL actuator. Which I then actuated and reinstalled. Problem solved.
Yes, I had mine wrong. I finished everything, and bolted it in, went to bed to fire things up the next morning. Then had the very fortunate stray thought that perhaps I did something wrong. I settled with much resentment to pull it down to check, and I’m so glad I did. Mine was definitely also in the wrong position.
 
Not sure how far of a tear down your doing, but before you reassemble and seal down the CDL motor, make sure you place the internal components in the position that you took it out in: IE, H or L range. There is discussions on here that recommend placing in L range. I did that, but have no understanding as to the why. Someone smarter than me can answ

This is good advice. When I put my transfer case back together I thought I understood which way the CDL gear was supposed to be and wouldn't ya know it, I had it reversed. Fortunately was able to lower the crossmember a small amount to remove the CDL actuator. Which I then actuated and reinstalled. Problem solved.
Hopefully this shouldn’t be an issue for me. I am just removing the TC to replace the transmission output seal. I won’t be dissembling the TC. I plan to just remove it with the center diff locked and reinstall it with the diff still locked.
 
Hopefully this shouldn’t be an issue for me. I am just removing the TC to replace the transmission output seal. I won’t be dissembling the TC. I plan to just remove it with the center diff locked and reinstall it with the diff still locked.
Should be no issue then. All this comes into play when you have the TC out on your work bench in parts. :cool:
 
Hopefully this shouldn’t be an issue for me. I am just removing the TC to replace the transmission output seal. I won’t be dissembling the TC. I plan to just remove it with the center diff locked and reinstall it with the diff still locked.
Not sure your plan for lowering the T case out of the way to get to the seals, but thought I would at least link the jack that I used in combo with another 3 ton standard jack. I also used a combo jack stand with bottle jack, but you could just use a bottle jack too.


You will need to plan and stage your approach with the respective jacks in the right place and in the right orientation. I also had the vehicle lifted higher so that I could also role the t-case on the low trans jack out from under the vehicle. Note of caution if you use that transmission jack or something similar: the angle as everyone mentions is a pain as it makes it want to roll. Just be careful, and easy with movements. I ended up with it sliding nearly off and had to gently guide it to the ground. The strap on the jack I trusted to much and wiggled just enough after tightening the heck out of it to loosen becuase the Tcase is a wedge shape. I would use some more rachet straps next time to pin it in place from other angles It’s not outrageously heavy, but it does still weigh a lot and it does not feel great when it pins your gloved hand on the ground and leaves you trying to figure out how to free yourself while under a vehicle.
 
Not sure your plan for lowering the T case out of the way to get to the seals, but thought I would at least link the jack that I used in combo with another 3 ton standard jack. I also used a combo jack stand with bottle jack, but you could just use a bottle jack too.


You will need to plan and stage your approach with the respective jacks in the right place and in the right orientation. I also had the vehicle lifted higher so that I could also role the t-case on the low trans jack out from under the vehicle. Note of caution if you use that transmission jack or something similar: the angle as everyone mentions is a pain as it makes it want to roll. Just be careful, and easy with movements. I ended up with it sliding nearly off and had to gently guide it to the ground. The strap on the jack I trusted to much and wiggled just enough after tightening the heck out of it to loosen becuase the Tcase is a wedge shape. I would use some more rachet straps next time to pin it in place from other angles It’s not outrageously heavy, but it does still weigh a lot and it does not feel great when it pins your gloved hand on the ground and leaves you trying to figure out how to free yourself while under a vehicle.
Yes honestly my plan is to have a buddy help me lower it. I haven’t really game planned for how I’m going to drop it out. I may pick up that jack you recommended.
 
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