Dana 18 removal

I got a wild hair this morning and removed my transfer case as part of my tranny/tc rebuild this month. I fear I should have read something before just removing stuff.

So, I noticed AFTER removing it that Novak's directions say:

I pulled mine off with the input gear still attached to the tranny. Is this going to be a problem to get it loose now?

I promise I will read some sort of directions before attempting any more work.

 

no problem. you obviously have a large hole 18. The small hole won't fit over that gear that's why the instructions say remove the gear first.

JB

 

I dont think it should be an issue, IIRC. I think the whole reason youre supposed to take that gear off is so that those gears dont bind together when pulling the tranny and t-case apart...If i remember right they were helical cut, right? It been awhile since i did that part.
Steffy

 

Thanks guys. It came apart as smooth as silk with only minor wiggling, but I worried maybe there was a reason for the instructions, and the small hole 18 makes sense. I do have the big hole 18 behind my V6/T86 combo. The gears are helical cut Steffy.


Now to tear it apart and see what I need, tear apart the T86 and see what I need, and place a nice order with Herm. I don't know how Sparky talked me into rebuilding these things myself....i'm a geneticist.

 

How about some tips for removing the trans/transfur from the the jeep.I have no idea how to do this.T90/danna spicer 18 single

 

I am not the one to ask I am afraid. I removed my skid plate, drained all fluids, removed exhaust pipe that goes from p/s manifold to the "Y" junction, disconnected drive shafts, transfer case shifter linkage, bellcrank, speedo cable and removed floor panels in the cab. A co-worker happened to call while I was close to being done and he helped me bench press the transfercase out. It is only held to the tranny by 5 bolts.

For your transfercase you might have to remove the rear pto plate and remove the input gear first.


I think I should have pulled my emergency brake drum first (on the vehicle) so I don't have to fight the nut on the rear yoke.

http://www.willystech.com/wt/Model18TCase/Model18TransferCase.html

Vernco has some good tips...if I would only read before grabbing a wrench:

http://www.vernco.com/tips/

 

So should I be able to put a jack under the skid plate unbolt and lower the tranny down?I thought there was a shaft that went into the bellhouse.If so how do I unhook it?

 

It just slides right out based on the one I pulled a few months ago.

 

Thanks guys.You've been a great help.

 

Here is another good resource for a model 18 rebuild. I just finished one and I used them all because each one seemed lacking a small detail that other sources covered;
http://www.jeep-trucks.com/WOJP/TransferCase/

 

I started pulling my tcase yesterday. Getting ready for the big rebuild.

A few years ago when I pulled it to change the tranny I tried using a regular floor jack instead of a transmission jack. It worked ok but ended up tipping of the block of wood on the jack at the last minute and broke off the bottom ear where a bolt goes through. It's been that way for several years and seems to be ok. Does anyone have any ideas on this problem? Can it or does it need to be fixed?

 

Thanks Glenn.
I'll add it to the list of things to do while it's out.

 

Just cleaned up the outside of the transfer case..... I think I must hold some kind of record for pounds of dirt/grease per square inch. Now I know where that quart of gear oil every 1000 miles was going. I suppose 37 years and 90,000 miles of neglect add up to something.

Edit: On a brighter note the metal was actually very shiny and not oxidized at all due to the protective covering.

 

I didn't know they made a transmission jack.Should a 2 ton hydraulic trolley jack work?Any more tips on takeing the tranny (T90) out?

 

For me, with limited tools and a love for making things difficult, I would just pull the transfer case first, unbolt the tranny with the crossmember still in place, then unbolt the crossmember while it is supported by a jack.

then just straight back until the shaft clears and drop it down. Neither the transfercase or tranny are that heavy.