This is a great site with tons of write up on many common problems and upgrades:
www.stu-offroad.com/siteindex.aspHere's a list of topics on this site
Suspension & Brakes
Vanco 16" Big Brake Kit for 15" Wheels - Upgrade
Vanco Big Brake Kit
Suck-down winch project
Rear Coil Spring Retainers
ORO SwayLOC Upgrade
D35 Disc Brake Conversion
OffRoadOnly SwayLOC
Bumpstops
Vanco Hydroboost Brake Upgrade
Brake Line Pressure Testing
Toys by Troy Alumiflex Suspension
Currie AntiRock
RE Cartridge Joint Maintenance
D44 Rear Disc Brake Conversion
Teraflex Bushing Replacement
Currie AntiRock Longer Front Links
Front Disc Brake Overhaul
RE Control Arm Bushing Replacement
TJ Extended Front Brake Hoses
Control Arm Bracket Bolts
Upper Control Arm Bracket Failure
ZJ Combination Valve Swap
TJ Rear Shock Relocation
Control Arm Bracket Spreader
Brake Line Flaring
Bleeding Hydraulic Brakes
RE 4" Superflex Suspension Installation
RE Adjustable Front Track Bar
RE Adjustable Rear Track Bar & Bracket
Teraflex Swaybar Quick Disconnects
Terfaflex 2T 2" Suspension Lift
32" Tire Clearance on a 2T Lift
T-case Lowering Kit Install
Lighting & Electrical
LED Lights and Evap Canister Solution
Early TJ Dual Switch Panel Mod
Add a Switch to the TJ Factory Switch Panel
TJ Dome Light Cutout Switch
TJ Rocker Switch Vent Panel
Factory Fog Lights with High Beams
The No-Mod '01-'06 TJ LED Flasher
4" LED Reflective Mounting Flange
Dash Mounted 12V Switch Panel
TJ Fog Lamp Switch Diagram
sPOD and The Source Power Center
LED Dome Light Upgrade
TJ Turn Signal FAQ
Kodiak Dual Battery & Management System
Rubicon Locker Switch Bypass
3rd Brake Light - LED Style
FM Wired Modulator
Switches and Relays
12V Selectable Backup Lights
12V Fan Bypass Relay
TJ Console Switches
12V Backup Light Relay
Voltage Test Light
LED Backup Lights
12V Relay Socket
12V Aux Fuse Block
LED Tail Lights
115 Volt Inverter
LED Conversion
Easy 12 volt Power Receptacle
Rock Light Install
Electrical Odds & Ends
Wire Size Selection
Optima Battery Comments
Off-Road Lighting Primer
Bumpers, Tires, & Tire Carrier
Bead Locks and Maxxis Trepadors
Toys by Troy Front Bumper
Canyon City Tire Carrier
TJ Stock Bobbed Bumper
Toys by Troy Rear Bumper & Tire Carrier
32" Tire Clearance
Extended Thread Lug Nuts
Guards & Armour
Toys by Troy Aluminum Gas Tank Skid
Engine & Transmission Skid
Toys by Troy Side Sliders
Toys by Troy Sports Bar
Toys by Troy Rocker Guards
Toys by Troy Corner Guards
Oil Pan Skid
D30 Diff Guard Cover
D44 Diff Guard Cover
D30 Truss and Control Arm Armour
ORF Front Sports Bar
Tomken Gas Tank Skid
Sun Performance Rocker Guards
Engine, Trans & T-Case
HealTech Electronics SpeedoHealer
TJ 4.0L Timing Change Replacement
'05 Water Pump Replacement
JB Super Short SYE
Novak Cable Shifter for NP231 Transfer Case
RADesigns Rail Shifter
Renix AW-4 Tranny Swap into a YJ
Tim Doumit's AW-4 Tranny Swap
Piecemeal Enclosed Cold Air Intake
TJ Heat Dissipation Project
TJ Heater Core Replacement
Auto Transmission Cooler
FloMax 300 Fuel Filtration System
AW-4 Manual Shifter
Stu Olson's AW4 Tranny Swap
Air Conditioning Tune-up
Serpentine Belt Routing
Engine Tune-up
Changing the TJ Fuel Pump
ScottK's AW-4 Tranny Swap
SYE Installation
Tera 4:1 and 2LO install
TJ Water Pump Replacement
TJ Radiator Replacement
Changing Spark Plugs
K&N Filter Pre-Charger
Advance Adapters SYE Install docs
Changing Speedo Gear
OBDII Scan Codes
OBDII Diagnostic Interface
AX-15 Manual Transmission Fluid Change
AirAid Airfilter System
TJ Airbox Reloaction for York Install
TJ Hand Throttle
Engine Oil & Filter Change
Stuck Oil Filler Cap
Air Filter Change
Axles, Diffs & Driveshafts
D30 Ball Joint Replacement
Alloy USA Axle Tube Seals
Warn Small Hub Kit Maintenance
Unit Bearing Removal
Superior Super88 Kit
30 Spline Alloy USA Outer Axle Shaft
D30 Axle Shaft Oil Seal Replacement
Pinion Alignment
Alloy USA D44 Axle Shafts
Tom Wood Front Drive Shaft
ARB Cylinder Cap Bolt Replacement
Extended Thread Lug Nuts
ARB O-Ring Replacement
TJ Front Drive Shaft
CV Assembly Overhaul
Ox U-joint Installation
Warn Hub Conversion
TJ Rear Axle Swap
ARB Locker Install
Manual Air Switch for ARB Air Lockers
Putting TJ D30 shafts into a YJ
Ford 8.8 Rear Axle Swap
D35 Axle Shaft Removal
D30 Axle Shaft Removal
TJ Front Driveshaft Overhaul
Axleshaft U-Joint Replacement
TJ D44 Rear Axle Shaft Overhaul
Drive Shaft U-Joint Replacement
Always Check it Out
Changing Diff Fluid
Benefits of Lock Out Hubs
U-joint Lubrication
U-joint Inspection
MAC Valve - ARB Replacement Solenoid
Steering
TBT Cross-Over Steering Part Numbers
Hydraulic Ram Assist Steering
TBT Crossover Steering Installation
PS Pump and Remote Reservoir
Steering Box Replacement
Power Steering Fluid Cooler
Power Steering Pump Replacement
Power Steering Pulley Removal
Toys by Troy Crossover Steering
Currie Steering System
Tomken Steering Box Brace
RS-5000 Steering Stabilizer
TJ Steering Stop Adjustment
ZJ Tie Rod Conversion
Other Stuff
Garmin nuvi 260W GPS
SPOT GPS Satellite Tracking
Jeeputer - TJ Mobile Computer
Arizona USGS DRG DVD Collection
Utah USGS DRG DVD
Garmin 60CS and Ram Mount
CO2 Tank Cover
TJ Mobile Mapping
Rear Steer
OziExplorer - GPS Mapping Software
USGS DRG Topo CDs
Moab GPS Trail Coordinates
Rubicon GPS Trail Coordinates
Garmin III+ Mount
The Great Locker Debate
Trail Etiquette
Harquahala Mountain
GPS (Global Positioning System)
Winch, Recovery, & Air
Viking Offroad 350 Series Aluminum Hawse Fairlead
Bulldog 10K lb. Winch
Synthetic Winch Line Failures
Trail Fix for Synthetic Winch Line
Viking Offroad Synthetic Winch Line
ExtremeAire Compressor #2
In Cab Winch Remote Control
Hi-Lift Jack Storage
Throttle Winch Controller
Warn 9000i Winch Installation
Rear Tow Hooks
Hi-Lift Handle Hugger
CO2 Tank System
QuickAir2
QuickAir2 Upgrade
TJ York OBA Project
York OBA Clutch Bearing Service
ExtremeAire Onboard Air
Body, Tops, & Doors
Heated Seats for your Jeep
TJ Camp Kitchen
TJ Tail Gate Prop
JK Hood Lift
Safari Straps Accessories & Extras
Safari Straps Cage Nets
TJ Hood Project
Viking Offroad TJ Fast Back Soft Top
TJ Soft Top Quick Disconnects
TJ Mirror Make Over
TJ Hood Louvers
AC Condensation Leak
TJ Seat Risers
Onboard Half-Door Storage
Hardtop Carpet and Painting
Tough Stuff Products Netz
Tough Stuff Paint Protectors
Half-Door Panel Removal
Jeep Hard Top Storage
TJ Soft Top Sunroof
TJ Rear Storage
Body and Motor Mount Lifts
(the rest of the story)
Hood Lift
Gauge Overlays
Lapbelt 3"
CB & Ham Radio
Midland 1001LWS Install & Review
Teraflex CB Antenna Mount Kit
CB Antenna Selection Considerations
Choosing a CB Radio
Cobra Off-Road CB Kit
Uniden Off-Road CB Kit
General Electric CB Radio
CB Coax Connector
CB Antenna Install & Adjustment
Ham Radio & Jeepin'
Exposing the 18' Coax Cable Myth
Trail Communications Primer
Mobile Radio Install Tips
TJ Radio Communications
CB Radio RF Noise Suppression
Misc.
Donna's 4x4 Beef Jerky
Aluminum Fire Extinguisher Mount
4x4 Trailer
TJ Horn Alarm
Fresh Air for the TJ
12V Trail Drill
Harbor Freight U-Joint Tool
Raingler Nets
Part Numbers
Common Maintenance Info
And more....