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 TeraFlex
 TeraFlex Dana 30 High Steer Knuckle TeraFlex Dana 30 High Steer Knuckle

Finally a high-steering solution for the stock Jeep Dana 30 front axle!

The TeraFlex Dana 30 High-Clearance Steering Upgrade replaces the outer knuckle on the passenger's side with a new, custom-manufactured high-clearance steering knuckle.

By raising the steering arm position, the kit restores the drag link's factory position and returns ride quality to stock levels.


 

Tera Low Range Kits for Dana 18 and Dans 20 Transfer Cases

 Dana 20 Jeep kit 3.15:1 for manual tranny
Dana 20 Jeep kit 3.15:1 for manual tranny - Low20 for manual transmissions This kit uses a six-spline input gear for Dana 20s with MANUAL transmissions. The kit converts the stock 2.03:1 to 3.15:1 for improved rock crawling performance. This five-gear kit fits ‘63-79 CJs, Jeepsters, Jeep trucks, Wagoneers, and ‘72-79 Scouts. Please call or email us for pricing information.
 3.15:1 Dana 20 gearset for 15 spline autos
3.15:1 Dana 20 gearset for 15 spline autos - This gear set converts the low-range ratio to 3.15:1 for better off-road performance. It is similar to the Low20, but designed for factory Turbo400 AUTOMATIC transmissions. It uses a fifteen-spline input gear which is common in vehicles from 1966-1973 with the Turbo400 transmission. It will not fit QuadraTrac transfer cases. Please call or email us for pricing information.
 Dana 18 Jeep kit 3.15:1
Dana 18 Jeep kit 3.15:1 - This kit reduces the 2.43:1 stock low-range ratio to 3.15:1. This kit works on ‘66-71 CJs, utility wagons and pickups. CJs older than 1966 require a large Dana 18 or 20 transfer case housing from a ‘66-79 Jeep®. Please call or email us for pricing information.
 Dana 20 Bronco 3.15:1
Dana 20 Bronco 3.15:1 - This low-range gear kit for the Bronco Dana 20 converts the stock 2.46:1 to 3.15:1. The Low20B for Broncos requires a six-spline output shaft to work. Please call or email us for pricing information.
 LOW20 for Scout Autos with Dana20s
LOW20 for Scout Autos with Dana20s (3.15:1 low-range ratio) - This gear set converts the low-range ratio to 3.15:1 for better off-road performance. It is designed for the Scout’s AUTOMATIC transmissions. It uses a 23-spline input gear. Please call or email us for pricing information.

 

Tera Low Range Kits for Dana 300 Transfer Case

 Dana 300 Jeep 30spl 4:1
Dana 300 Jeep 30spl 4:1 - Change a CJs 2.6:1 stock ratio to a true, 4.0:1 low-range ratio. This low-range gear replacement kit benefits from the Dana 300’s strength and durability. It allows the Jeep® owner to enhance trail performance by maximizing their crawl ratio. Installation of this kit into your transfer case will increase your crawl ratio by 50 percent. Please call or email us for pricing information.
 Dana 300 Scout 6spl 4:1
Dana 300 Scout 6spl 4:1 - Change a Scout’s 2.6:1 stock ratio to a true, 4.0:1 low-range ratio. This low-range gear replacement kit benefits from the Dana 300’s strength and durability. Please call or email us for pricing information.
 Dana 300 Scout for Scout Automatics
Dana 300 Scout for Scout Automatics - Change a Scout’s 2.6:1 stock ratio to a true, 4.0:1 low-range ratio. The Low300SCAUTO is designed for automatic transmission. Please call or email us for pricing information.
 Heavy-Duty Shaft Kit for Dana 300
Heavy-Duty Shaft Kit for Dana 300 - This kit replaces the stock output shaft of the Dana 300 transfer case with a heavy-duty output shaft. The new shaft is better suited for high-torque and high-stress situations because it is thicker and stronger. It is great when combined with the Low300 gear set because of its additional strength.
Note: This kit is designed to be used on the Dana 300 transfer cases that originally had the longer tailhousing. Bolt pattern differences prevent this kit from working with the shorter tailhousing design. Please call or email us for pricing information.
 Dana 300 Overhaul Kit
Dana 300 Overhaul Kit - This overhaul kit for Dana 300 Contains all the bearings and seals to completely overhaul the Dana #300 transfer case. Kit includes intermediate shaft, shim set for bearing adjustment and shift fork friction pad set. Please call or email us for pricing information.

 

 Tera Low Range Kits for NP231 Transfer Case Tera Low Range Kits for NP231 Transfer Case

The Tera Low231 conversion kit is the best solution for providing Wranglers, Cherokees, and Comanches with low crawl ratios. This kit increases rock-crawling performance without affecting the high range for the trip to and from the back country. It provides true 4.0:1 reduction without the noise of older planetary systems. Every part in this kit is new; there are no core charges. Shift linkage and driveshaft length changes are not necessary. The Tera Low231’s high input torque rating suits it for use with V8 engines. Each Low231 is covered with our exclusive two-year warranty. The Tera Low231 is compatible with the 2WD Low-Range Shift kit (Part #2LOW231) and the TeraLow Short Shaft kit (Part #231SS).

In house installation is available at Extreme Gear Off Road. Fully assembled kits are also available for shipping. No core required.

Kits are available for all vehicle types with an NP231 transfer case. Stock replacement NP231 transfer cases are also available. Please call or email us for the kit that is right for your vehicle!

 Tera 2Low Range Selector
Tera 2Low Range Selector - The 2Low kit frees up the front axle for better steering while keeping your low range. It lets you choose 2 Low in addition to standard options. The 2 Low kit will eliminate drive train bind and most of your three-point turns. This kit is completely internal and does not require any external modifications. Please call or email us for pricing information
 TJ Shift Plate Link
TJ Shift Plate Link - This plate helps to adjust various shifting issues. It is often useful on vehicles using body lifts in combination with lowered transfer cases. Please call or email us for pricing information
 Heavy Duty NP231 Short Shaft Kit
Heavy Duty NP231 Short Shaft Kit - This short shaft kit, or slip yoke eliminator, with the new, heavy-duty shaft is engineered to withstand the increased torque (50% increase) generated by extreme reduction of the TeraLow Low231. The kit also eliminates the need to lower the transfer case in most cases by increasing the rear driveshaft length by four inches. It includes a larger output bearing and rear housing. Note: Requires CV drive shaft. Please call or email us for pricing information
 Seal Extension for Auto Trans
Seal Extension for Auto Trans - A simple extension is used to position the seal of the automatic transmission properly against the transfer case. This kit may be ordered separately as needed. For YJ and TJ 3-speed automatics. Please call or email us for pricing information
 TJ Driveshafts
TJ Driveshafts - Tera offers high quality drivelines to compliment The Tera Low231 Short shaft kit. This driveline helps to reduce extreme angles common in short wheelbase vehicles. Please call or email us for pricing information
 Cherokee transfer case lowering kit
Cherokee transfer case lowering kit - The transfer case lowering kit for Cherokees ‘84-99 is used to control drive shaft vibration caused by increased ride height in excess of two inches. Please call or email us for pricing information
 YJ and TJ transfer case lowering kit
YJ and TJ transfer case lowering kit - The transfer case lowering kit for YJs or TJs is used to control drive shaft vibration caused by increased ride height in excess of two inches. Please call or email us for pricing information

 

TeraFlex Axle Housings - New Tera CRD60R, Tera 60R, and Tera 50R

Extreme Gear Off Road specializes in building custom differentials. Tera axle housings are available in a variety of sizes to fit your application perfectly. Extreme Gear can build a custom axle with your choice of size, width, brakes, gears, and locker options. Please call or email us for more information and pricing.

TeraFlex CRD60R Axle Housing
 Tera60R logo


Tera CRD60R

The new Tera CRD60R is here! Pinion angle problems are virtually eliminated with this housing. The contoured CRD bottom of the CRD 60R provides maximum ground clearance that is unaffected by pinion angle. It's reinforced bearing caps are thicker to virtually eliminate all flex and distortion. As with all Tera axles it features a custom mounting pad that is convenient for anyone mounting a three-link suspension or torque control struts to the housing. The Tera60R can be made ARB ready at no additional cost.


Tera 60R Housings

TeraFlex 60R High Performance Differential



Tera 50R Housings

TeraFlex 50R Axle Housing

The Tera50R high-performance differential is the first Tera axle to use our patent pending CRD design. The design provides extreme ground clearance that is virtually unaffected by pinion angle. The Tera50R lends itself for use in the front where ring and pinion strength is improved by changing to a high-pinion axle. The Tera50R is also an ideal, high-pinion rear replacement axle for Dana 44 owners because most components from the Dana 44 can be used in the Tera50R. Axle shafts, brake kits, yokes, and carriers can all be swapped over to the new housing. The Tera50R comes standard with a reinforced differential cover to withstand the abuse of off-roading that the thin, stamped-metal covers of standard differentials would never survive. Each Tera50R comes ARB ready.

 


TeraFlex Ring and Pinion Gear Sets

TeraFlex Ring and Pinion Gear Sets

Extreme Gear Off Road sells a full line of TeraFlex Ring and Pinion gear sets and install kits. A variety of ratios are available for all popular differential sizes. Extreme Gear Off Road specializes in gear and locker installation. Please call or email us for more information and pricing.

TeraFlex Ring & Pinion Gear Sets
Differential
Ratio
Dana 20
4:10 ring and pinion
Dana 20
4:56 ring and pinion
Dana 30 - YJ
4:10 ring and pinion
Dana 30 - YJ
4:56 ring and pinion
Dana 30 - TJ
4:10 ring and pinion
Dana 30 - TJ
4:56 ring and pinion
Dana 30 - CJ
4:56 ring and pinion
Dana 35
4:10 ring and pinion
Dana 35
4:56 ring and pinion
Dana 44 - Standard
4:10 ring and pinion
Dana 44 - Standard
4:56 ring and pinion
Dana 44 - Reverse
4:10 ring and pinion
Dana 44 - Reverse
4:56 ring and pinion
Dana 60 - Reverse
4:10 ring and pinion
Dana 60 - Reverse
4:56 ring and pinion
Dana 60 - Reverse
5:13 ring and pinion
Tera50R - Reverse
4:10 ring and pinion
Tera50R - Reverse
4:56 ring and pinion
Tera50R - Reverse
5:13 ring and pinion


 

TeraFlex Axle Products

Extreme Gear Off Road carries a full line of TeraFlex axle products and components. Please call or email us for additional information on any of the products below, and for pricing.

 Disc Brake Kits

Disc Brake Kits - This disc brake kit is ideal for anyone wanting to add a quality brake package to their axles. It provides :improved braking capacity, better stopping in wet conditions, and stronger emergency brake holding power. The internal drum parking brake provides outstanding holding power when compared to other disc brake conversions. The bolt pattern on this kit matches the ‘big-Ford’ housing ends. The brake rotor is offered in both 5 on 4½ and 5 on 5½ bolt patterns.

Kits are also available for all TJ's, ZJ's and YJ's and XJ's with the stock Dana 35 c-clip axles.

 CV Joints
CV Joints - These CV joint axle components replace the cross and cup universal joint in steering axle applications. The constant velocity design eliminates the shock loading that occurs with conventional u-joints when the tires are turned and power is applied in low-traction situations. These CV steering joints combined with our high-strength alloy inner shafts can be used in both the Tera60R and Tera50R.
 Heavy Duty Knuckles
Heavy Duty Knuckles - These inner knuckles will prevent you from having to canabilize an entire axle assembly just to use the knuckles. Other knuckle components will be available soon.
 TJ Rear Axle Bracket Kits
TJ Rear Axle Bracket Kits - This kit includes all the brackets needed to properly attach a new axle to a TJ Wrangler. These brackets are laser cut from 3/16-inch steel and precision formed to ensure proper axle positioning and suspension geometry. We currently offer a kit for the TJ rear. (Part #ABK-TR) A matching kit for the front will be available soon.
 Rear Housing Ends, Big Ford Style
Rear Housing Ends, Big Ford Style - This ‘big-Ford’ new-style housing end can be welded on to your axle tubes. This is the style of housing end used on all Tera axles unless otherwise specified. Other models will be available soon.
 Tera 60R Axle Shafts
Tera 60R Axle Shafts - These 35-spline axle shafts provide extreme strength for high-performance axles. Rolled splines ensure maximum strength. They provide options for both 5 on 5½ and 5 on 4½ bolt patterns. Lengths available for most popular Jeep applications. Sold in pairs.
 U-Bolt Conversion Kits for Dana 30, Dana 35, and Dana 44 axles
U-Bolt Conversion Kits for Dana 30, Dana 35, and Dana 44 axles - This simple kit replaces the yoke and changes the strap used to secure the U-joint with a stronger U-bolt style connector. The stronger U-bolt is also easier to replace after breakage when compared to the standard strap. Extra U-bolts can be stored for emergency use. This kit makes trail repair much quicker.