Ix, Leaky Transfercase, and front diff

[fight4life28]

I've been trying to look for a thread or posts regarding replacing the seals in the Transfercase, & Front diff on my e30 IX. Looked at FCPEuro, EEuroparts.com, Buntech. I would like to reseal them so I don't have to worry about the leaks and fluid. Just got my IX and I'm worry about running the transfer case dry and having problems/issues later down the road.

[spdracrm3]

here's a start (what can be done in car)
for the front diff from factory manual pages 31-23 ,31-25

https://www.bmwtechinfo.com/repair/main/561en/htm/501.htm

T-case rear output seal is basically the same as the trans rear output seal replacement seen here

https://www.bmwtechinfo.com/repair/main/561en/htm/372.htm

rear driveshaft removal

https://www.bmwtechinfo.com/repair/main/561en/htm/459.htm

the front driveshaft seals (there are 2 face to face with outermost having spring removed ,making it a dust shield). this link shows shaft removal then seals are pulled and replaced noting orientation and depth (critical)

https://www.bmwtechinfo.com/repair/main/561en/htm/470.htm

[fight4life28]

Thank you very much! I've heard you must keep theses IX's well maintained to keep your Awd Function and to make sure you dont have to many iuesses

[spdracrm3]

yes a well maintained leak free IX is a happy IX ,enjoy your Sno-mobile

also if you ever do need it towed make sure its flatbed tow only ! biggest killer of Viscous Coupling is improper two wheel towing and running the T-case dry.

[boogle2]

My front output shaft spills out all fluid in about 50km, and case is dry.

Would you guys recommend getting the bmw tools to do this job? Or can they be done with regular hand tools? Some of those bmw guides don't seem the most helpful...


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[spdracrm3]

it can be done without the factory tools ,i did mine without

[boogle2]

How careful do I need to be about seal depth? I noticed the manuals discussing it briefly. Will this really be just as simple as removing cap, flex disc bolts and shaft, hooking out the 2 seals, and then replacing them?


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[spdracrm3]

close (there's an external snap ring to remove also #12 below(holds the plastic shield in place), you can hook the seals or insert screws into them just be sure not to scratch the sealing surface while removing

depth is important so just measure each before removing and insert new to the same depth (i used a deep socket ), tape the front area of shaft to avoid cutting new seals , and put outer seal in backwards with no spring in it (its just a dust shield )

tcase of course will drain with seals removed so will need to be refilled

[boogle2]

Speed Racer, you are a life saver. Loving this help.

Real OEM shows a slightly different assemby, see below. Here is the bill of materials for the assembly, showing only one seal (27241224660 ) on the front output shaft, however, when I ordered them, it came with 2 in the bag, both with springs. The assemble shows another seal (27211224636) but it looks like this one is on the output flange. This one I ordered and it has a spring as well and is a different diameter than the 660 seal.

Also, does anyone have a part number for the rear output shaft seal? It looks like it could be 20 in the assembly diagram (which is not labelled), but #20 is called a support.

Thanks for the help

Here is a link for the below BOM as it did not paste well:

http://www.realoem.com/bmw/showparts...03&hg=27&fg=05


No. Description Supplement Qty From Up To Part Number Price Notes Photo
01 UNIVERSAL JOINT LK=96MM/D=146MM 1 26111209168 ENDED
01 UNIVERSAL JOINT LK=96MM/12 1 26117511454 $120.93

02 Bush 14X16X20 1 27211224680 $8.59
02 Bush 14,2X16X20 1 27211227157 ENDED
03 Drive Shaft 1 27211224630 $307.03
04 SELF-LOCKING HEX NUT M12X1,5-10-PHR 6 07129900047 $0.62

05 Hex bolt M12X1,5X56 3 27101220647 $2.16
06 Shaft seal 32X47X7 1 27211224632 $15.75
07 Lock Ring 1 27211224631 $2.30
08 GROOVED BALL BEARING 45X75X16 1 07119981063 $38.55
09 Shaft 1 27241227039 $271.05
only in conjunction with
-- Cover 1 27241226617 $110.51
-- CHAIN 1 27241227036 $344.02
-- Shaft 1 27241227037 $403.70
10 NEEDLE SLEEVE 1 27241224659 ENDED
11 Shim 1 27241224664 $3.48
12 Lock Ring 65X2,5 1 07119934255 ENDED
13 Cover 1 02/1987 27241226617 $110.51
only in conjunction with
-- Shaft 1 02/1987 27241227039 $271.05
14 PLANET WHEEL CARRIER 1 27221224642 ENDED
15 Shim 27,6X35X1,5 1 27221224644 ENDED
15 Shim 27,6X35X1,8 1 27221224645 ENDED
15 Shim 27,6X35X2,1 1 27221224646 ENDED
15 Shim 27,6X35X2,4 1 27221224647 ENDED
15 Shim 27,6X35X2,7 1 27221224648 ENDED
15 Shim 27,6X35X3,0 1 27221224649 ENDED
16 NEEDLE CAGE 1 27211224637 $12.24
17 HOLLOW GEAR WHEEL 1 27221224643 ENDED
18 Output shaft 1 02/1987 27211226663 ENDED
19 SNAP RING 1 27221224640 ENDED
20 Support 35,3X50X2 1 02/1987 27211226472 $5.83
21 GROOVED BALL BEARING 35X62X14 1 07119981054 ENDED
22 GROOVED BALL BEARING 25X47X12 1 07119981047 ENDED
23 Shaft seal 35X47X7 1 27211224636 $15.75
24 Output flange 1 27211224633 ENDED
25 Collar nut 1 27211224634 $22.17
26 SNAP RING 1 27241224662 $3.25
27 Shaft seal 44X60X10 2 27241224660 $26.16
28 GROOVED BALL BEARING 45X75X10 2 07119981724 $25.20
29 Shaft 1 27241227037 $403.70
only in conjunction with
-- CHAIN 1 27241227036 $344.02
-- Shaft 1 27241227039 $271.05
30 Cover lid D=36MM 1 11111717939 $2.20
31 CHAIN 1 27241227036 $344.02
only in conjunction with
-- Shaft 1 27241227037 $403.70
-- Shaft 1 27241227039 $271.05
32 Clutch 1 02/1987 27241226401 $947.65
only applies to
-- Housing ? 02/1987 27111226799 $339.61

Rob

[spdracrm3]

"Real OEM shows a slightly different assemlby, see below. Here is the bill of materials for the assembly, showing only one seal #27 (27241224660) on the front output shaft, however, when I ordered them, it came with 2 in the bag, both with springs. this is normal remove the spring from one of the seals and install it backward outside the first


. The assemble shows another seal (27211224636) but it looks like this one is on the output flange. This one I ordered and it has a spring as well and is a different diameter than the 660 seal.

Also, does anyone have a part number for the rear output shaft seal? It looks like it could be 20 in the assembly diagram (which is not labelled), but #20 is called a support.

#23 Shaft seal 35X47X7 1 27211224636 $15.75 is the rear driveshaft output seal

#6 06 Shaft seal 32X47X7 1 27211224632 $15.75 is the only other seal and it is for the front input shaft (requires disassembling t-case to replace)

[boogle2]

Awesome, thanks. Installing outside first would mean that installing the one without the spring would be installed with the gap where the spring used to be facing the tcase or the driveshaft?


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[spdracrm3]

take a good look as you remove them you first see a seal in backwards with spring removed lip outwards,once that seal is out you will seal in the correct way (spring and lip facing inwards) measure and remove . now install first seal with spring/lip inwards toward tcase set to correct depth, then remove spring on second seal and install it backwards lip outwards facing driveshaft ,again set to correct depth(factory tools you see do this automatically)

[boogle2]

Speed, you wouldn't happen to have the bmwtechinfo guides for the Curil K2 application to the rear output shaft would you?

[spdracrm3]

not sure what exactly your looking for but this is whats in the factory manual /TIS , when i do it i coat the threads and first 1/2 " of splines both on shaft and flange .