Transfer case removal question. -

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post #1 of 21 Old 04-29-2007, 08:32 PM Thread Starter
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Transfer case removal question.

I just ordered a sye kit for my np231. In preparation of the install I read the transfer case section in my Haynes manual and it explains that the transmission and transfer case is to be removed as one unit. Is this true, do I have to remove the transmission or can I just remove the transfer case and take care of buisness? Or can I just disassemble the rear of the transfer case while it is still attached to the transmission on the jeep?

Thanks in advance,

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post #2 of 21 Old 04-29-2007, 09:01 PM
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I've heard of others who have removed the tcase by itself. Never tried it myself, but would think it could be done if you drop the rear of the whole unit enough to reach all the nuts holding them together.
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post #3 of 21 Old 04-29-2007, 09:03 PM
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You can remove the transfer case without removing the transmission. I want to say there are 8 studs connecting the two. Also, you CAN install the SYE with the case in the jeep, but IMO it is much easier with it removed. It reall doesn't take that long to drop the case out.

'87 YJ, 4.2L, MC2100, HEI, RE 4.5", 2" body lift, ford 8.8 locked, 36" Swampers, homemade discos, Superwinch x9
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post #4 of 21 Old 04-29-2007, 09:40 PM
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It took me 45 minutes to drop my case. Made things much easier. Worth the extra time, especially if it's your first.

1995 YJ 4.0L automatic
SOA on 1.5" Superlifts
35" BFG A/T's on AR 767's
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post #5 of 21 Old 04-29-2007, 09:49 PM
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remove the floor panel inside the jeep, the one around the gearstick.
makes it easy to get to the top bolts.....and no you dont need to remove the tranny!! done it the above way many times, never had any issues,....


1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
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post #6 of 21 Old 04-29-2007, 10:08 PM
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Yeah It is a lot easier to work with it out...

I didn't remove the floor plate Like Martin suggested, but that might be a good idea.

If you don't the top ones are not impossible to get... But they aren't easy to turn!
Good luck!

My 4.0 is in.... it runs, now let's see if we can get it on the road!!

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post #7 of 21 Old 04-29-2007, 10:14 PM
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When i took my transmission out to get rebuilt i took the t-case out first as a single unit. Made it much easyer to get the transmission out (didnt have a trans jack...D'OH!)

leftlanetruckin FTW......take out the floor pan around the shift levers (the shift boots and the dust boots underneith that). Makes it much more easier to take off the shifter and the top nuts.

'96 stock ZJ

Originally Posted by Crashnburn80 assuming your Jeep is right-side-up you should be ok.
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post #8 of 21 Old 04-29-2007, 11:18 PM
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yeah but no one has mentioned, be ready to catch it. haha jk. it will stay in place after you unbolt the studs (5 or 6 depending on year) then just slid it off the trans and you are golden... you can bench press right?

1993 YJ with a 4.0 & TF 999 & Np 231 (All to change soon!)

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post #9 of 21 Old 04-30-2007, 12:16 AM
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you can get access to the top bolts by just lowering the trans on the floor jack when the skidplate is off.
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post #10 of 21 Old 04-30-2007, 08:25 AM
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when we did mine, we just did the case and not the tranny. I would recommend some ratchet wrenches, you can't move around much in there. Also, if I were you, I would recommend rebuilding your np231 (new chain and stuff) at the same time. My case exploded in Jan. and mine hasn 't been running since. If I could bo back a few years, I would have done much more than just installing the sye in the 231 at that time, it may have prevented the explosion.

2nd YJ
93 Wrangler - 8.8 LS rear - D30 Aussied - Yukon 4.88 R&P - TW driveshafts Front and Rear - AA SYE Kit - RE 4.5" ED Lift - M.O.R.E. Shackle Reversal - 35" Kuhmo MT - TJ Flares
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post #11 of 21 Old 04-30-2007, 08:27 AM
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so is it worth the hassle to remove the t-case, im getting ready to do an SYE in about a week, i heard that you don't need to drop it and my t-case only has 57K miles on it, actually the entire jeep does. So idk if my t-case really needs to have any replaced.

'90 I6 258 w/ Weber 32-36 Carb.
32" BF M/T's with cragar rims
5" BDS springs, MORE greasable shackles, XJ driveshaft, AA SYE kit, RE SS brake lines. Bilstein 5150's, 255/70 valving all around, 14" travel in front, 10" in rear.
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post #12 of 21 Old 04-30-2007, 08:49 AM
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while you're in there, what all else is good to change?

level of difficulty?

'93 YJ with 1 ton SOA in progress (slowly).

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post #13 of 21 Old 04-30-2007, 12:13 PM
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Pads for the shift fork.

To me it was extremely easy to take apart and reassemble---and I'm no mechanic.
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post #14 of 21 Old 04-30-2007, 01:05 PM
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well like everyone said you dont need to remove the trans as well, however do this - either have a jackstand tall enought to support the rear of the trans OR use a ratchet strap around the frame and under the trans to support the back half - its a bad time to find out your motor mounts are shot to have the engine fall backwards - (yes it can happen) Also saw a post about ratchet wrenches - a definate must have since on 2 of those you can only turn them 1/8 of a turn each time - takes FOREVER!

"Negative....I am a meat popsicle"
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post #15 of 21 Old 04-30-2007, 06:12 PM
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I put my AA SYE kit in about 6 weeks ago. I didn't drop the TC at all. I did it all under the Jeep and found it to be very easy. I really didn't want to mess with unbolting the TC from the tranny.

I unbolted the tranny from the skid plate, jacked up the tranny a little bit and put a jackstand under it and then dropped the skid plate to give good access.

Actual work time was about 2 hours to install the SYE kit. Half of that was done on the bench cleaning all the parts once I had everything disassembled and doing some partial reassembly. I had to take the shaft to a machine shop to get the bearings pressed off the main shaft though.

Good luck!

Yellow 2000 TJ, 4.0L, NV3550, 3.73 gears. 4" RC X-series lift, 33x12.50x16 MT MTZ's on 16x10 MT Classic Bead Locks. Bumpers, winch, axles and gears coming soon.

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