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Offroad Reports


Rausch Creek
Off-Road Park


Wheeling in the
Valley of the Ferns

1.jpg (70086 bytes)
Tellico North Carolina


Paragon Adventure Park
◦ Rock Krawl ◦

Thousands more photos here..»

 

Jeep Project CJ-7

An ongoing Budgeted Rebuild/Build up of a Rock
Crawling Machine.

Jeep Central
From Jeep History to Tech Specs and Projects.  This section is all about Jeeps.
Jeep Technical Info
Engines
Transmissions
Transfercases
Axles
Engine Swaps

Installing 23,000 Volt Offroad Lights

What are HID Lights?

Onboard Air
Converting a York
AC Compressor
to Pump Air

Warn 9500i Winch Installation
 

HEI Ignition
Installation & Review

Lockers, Limited Slips &
other Differentials Explained

 


Jeep Dana 300 TeraLow - 4:1 Gearset for the Dana 300 Transfer Case

Jeep Trans Swap
T-18A Transmission Rebuild & Short Shaft Conversion
  


Black Diamond Suspension Lift install for CJ-7

Ramp Travel Index
RTI / Ramp Travel Index What it is and how to calculate it, with and without the ramp.

Offroaders Guide to Gearing up for Offroad
From Basic Equipment to Well Equipped.  An extensive list guide to help you prepare your vehicle for the offroad.

 
 

 

 

 

Dana 300 TeraLow Installation
Kit from TeraFlex

Brought to you by Jeepfan.com
 

Glenn's 85 CJ-7 has little problems off road.  However one issue is a crawl ratio that is somewhat high (32.3:1)  The T-176 transmission has a 3.52 low gear and Glenn's Jeep has 3.54 axle ratios.  The Dana 300 transfer case offers a 2.62:1 low range which makes Glenn's Jeep tolerable off road but it could stand for some improvement.  A transmission or axle ratio change would be costly and time consuming.

TeraFlex offers a low range kit for Dana 300's that increases the low range ratio to 4:1.  The kit consists of 5 gears that replace all of the transfer case's original gears.  This modification requires some grinding to fit the idler gear into the case.



TeraLow Gearset

 

TeraLow Rebuild Kit

 

After completion this small change will improve the Jeep's ratio to 49.8:1 from 32.3:1 while still maintaining good cruise rpm and street drivability.  Follow along as this project progresses.

This table is a comparison of crawl ratio between the TeraLow and stock gearing.  The Jeep is equipped with 3.54 axle ratios.  The formula is gear X transfer case X axle ratio = crawl ratio.

Trans Gear 2.62:1 Gears 4:1 Gears
1-3.52 32.6 49.8
2-2.27 21.1 32.1
3-1.46 13.5 20.6
4-1.00 9.2 14.1
R-3.52 32.6 49.8

You can see the improvement on 1st gear.  Also 2nd gear is almost the same as the original 1st, this will come in handy when not in an absolute crawl situation.

There are several models of the TeraLow, there are TeraLow's for Dana 300 (4:1), Dana 20 (3.15:1), Dana 18 (3.15:1), and NP 231 (4:1).  Check out the TeraFlex web site for more detail.

Now onto the project.

Stage 1 - Buy Stuff and Extra Transfer Case

Glenn picked up the TeraLow from OK Auto and ordered a rebuild kit for the transfer case.  We also picked up a used Dana 300 to do the gear swap, this way the Jeep is left intact until ready for installation.

On to Page 2
 

Brought to you by Jeepfan.com
 

 

Offroad Tire Info
P-Metric Tire Sizes Conversion to Inches
Tire Terminology
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How to Pick the Right
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Michelin LTX AT2
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Mickey Thompson MTX
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Mickey Thompson Baja ATZ Radial SLT
Competition Claw
Dunlop Mud Rover
Federal Couragia M/T
Nitto Dura Grappler
Yokohama Geolandar
  
Dick Cepek's 2008 F-250 Super Duty Project Vehicle – Project CRUSHER
 
Mud Tire Reviews

Project_Kahn2.jpg (43446 bytes)
Project Kahn
2006 Range Rover
TD6 Vogue

Face-Lift

 



Off-Road Lights
by LightForce Product Review / Installation.
from Off-Road Lights


ARB Air Locker Install
Jeep Wide Track Axles Swap

  

Do it Yourself
Detriot EZ Locker Install  in a 92 Toyota 8" rear


For all the Jeep
Fans out there!

 

From the
Department of Cheap   Tricks and Useful Tips

  
Ultra-Cool Hand Throttle for Free!

Jeep V8 Swap Tips

The Exploding Clutch

Radiator Protection using 6 bucks worth of material

Cracked Under Pressure - Fixing a smashed fingernail

A Cheap, effective alternative to undercoating

Home-built Saginaw Gearbox Brace for the cost of lunch!

Ammo Box Storage - Mounting Them for Quick Disconnect

Home-built Serious Skid-Plate protection for the Oil Pan for under 20 bucks!

  

JEEP CJ
AXLE SWAP

Jeep CJ Axle Swap using
Scout II Dana 44 Axles

 

Building a Garage?
Need a Garage Plan?
Need a House Plan?
 


Knoebels Amusement Park

 

 
Ramp Travel Index
RTI / Ramp Travel Index  What it is and how to calculate it, with and without the ramp.

 


Reader's Rigs and Seriously Stucks!

 

Jeep Trans Swap Info
T-18A Transmission Rebuild & Short Shaft Conversion
  


Black Diamond Suspension Lift

install for CJ-7