Transfer case specifications (Defender 2007+)

Lubricants

Element	Technical specifications
Recommended oil	SAE 75W/90 or SAE 80W/90, API GL5, MIL-L-2105 (including B, C and D)
Volume	2.3 l

CAUTION: Use only the specified lubricant.

General Specification - LT230Q

Element	Technical specifications
Transfer case type	LT230QRS
Technical specifications	Two-stage reduction gear at the output of the main gearbox, front and rear drives are constantly engaged via a locking differential
Gear ratios:
High	1,211:1
Low	3,269:1

Transfer case specifications

Element	Metric system	British system
High/Low Range Selector Finger Width	15.90 - 15.95 mm	0.625 - 0.627 inches
High/Low Range Selector Fork Pin Width	7.37 - 7.47 mm	0.290 - 0.294 inches
High/Low Range Selector Shaft Groove Width	16.0 - 16.1 mm	0.63 - 0.64 inches
High/Low Range Selector Hub Groove Width	7.5 - 7.6 mm	0.295 - 0.30 inches
Differential lock selector finger width	15.90 - 15.95 mm	0.625 - 0.627 inches
Differential lock selector shaft groove width	16.0 - 16.1 mm	0.63 - 0.64 inches
Differential Lock Selector Fork Pin Width	7.92 - 7.9 mm	0.311 - 0.313 inches
Free length of differential lock selector spring	84,58 mm	3,33 in
Gear Clutch Selector Fork Groove Width	8.05 - 8.20 mm	0.32 - 0.33 inches
Front and rear differential axle gear turning force:
Used gears	0,45 kg	1,0 lb
New gears	1,72 kg	3,8 lb
Nomenclature of thrust washers by thickness	1.05 - 1.45 mm	0.04 - 0.06 inches
With discreteness:	0,10 mm	0,004 in
Total turning force - both sun gears installed:
Used gears	0,90 kg	2,0 lb
New gears	3,44 kg	7,6 lb
Clearance between low range gear and high range hub	0.05 - 0.15 mm	0.002 - 0.006 inches
Clearance between high range gear and high/low range hub	0.05 - 0.10 mm	0.002 - 0.004 inches
Secondary shaft pinion bearing preload	0,05 mm	0,002 in
Secondary Shaft Pinion Bearing Adjusting Shim Thickness Range	3.15 - 4.00 mm	0.12 - 0.16 inches
With discreteness:	0,05 mm	0,002 in
Differential bearing preload	0,05 mm	0,002 in
Nomenclature of differential adjusting shims by thickness
With discreteness:	0,05 mm	0,002 in
Transfer case gear rotation moment	3.4 Nm max.	30 ft·lbs max.

Tightening torques

Description	Nm	lb-ft
Drain plug	30	22
Transfer case breather banjo nipple connection	15	11
Differential cup bolts	60	44
Differential bearing nut	72	53
Differential lock selector lever nut	25	18
* Front secondary shaft housing bolts	25	18
* Rear outlet section bolts	45	33
*** Output flange nuts	162	120
** Differential lock selector housing bolts	25	18
High/Low Range Selector Housing Bolts	25	18
* Intermediate shaft mounting plate bolt	25	18
*** Intermediate shaft nut with caulking locking - non-deformable spacer element of selective length	88	65
* Bottom cover bolts	25	18
* Bolts and nut, screwed onto the stud, bearing housing covers	25	18
Transmission Brake Shield Bolts	72	54
Electromagnet Lock Cover Bolts (if available)	10	8
** Neutral Position Indicator Light Switch	25	18
Transfer case front drive flange to propeller shaft	47	33
Transfer case rear drive flange to propeller shaft	50	37
Transfer case to the protruding section of the gearbox housing	47	33

* Apply Loctite 290 to threads.

** Apply Hylomar PL32 to threads.

*** A new nut should be used.

Element	Nm	pound-foot
METRIC
M5	6	5
M6	9	7
M8	25	18
M10	45	33
M12	90	65
M14	105	75
M16	180	130
UNF/UNC SYSTEM
1/4	9	7
5/16	25	18
3/8	40	30
7/16	80	60
1/2	90	65
5/8	135	100

(The article is based on data from the website LRMAN.ru)

The table above contains tightening torque values for screws and bolts unless otherwise specified in advance.