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DRIVE TRAIN TRANSFER CASE

 
STAK TRANSFER CASE 2 AND 3 SPEED

What do you get with the Monster Box?  Your choice of Gear ratio, Your choice of a left or right hand drop output that is clock able from stock position to virtually flat.  Also included is an universal shifters, heavy duty  32 spline front and rear outputs, Timken Bearings and  32 spline 1310 CV style Spicer yokes. 

 

                  This is the 3 speed NEW MONSTER MINI 10% smaller than the "B"* BOX

 

 

 

This is the front of the 3 speed monster B BOX (empty case) bolted to a ZF 5 speed.

This is the rear or 3 speed monster B BOX (empty case)

 

MINI Monster Box 3 Speed Transfer Case

$2399.00

What’s included in our price:

 Options:

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Part Number                    PART            

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22-30110 STAK MINI MONSTER BOX 2 SPEED TRANSFER CASE

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22-30210 STAK MONSTER BOX A OR B-BOX 2 SPEED TRANSFER CASE

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22-30120 STAK MINI MONSTER BOX 3 SPEED TRANSFER CASE

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22-30220 STAK MONSTER BOX A OR B-BOX  3 SPEED TRANSFER CASE    

 

 
STAK SPECIFICATIONS
 

How the “Monster Box” is built

 

Housing

 The Monster Box Transfer Case housing is manufactured from cast 356 alloy aluminum and hardened to a T6 condition.  We fully CNC machine the entire profile and bearing locations ensuring all tight tolerances are maintained.  Our Housing utilizes an extremely thick wall to guarantee that case deflection under heavy acceleration is not an issue.

   

                                         

 

 

Gears

 The gears of the Monster Box are manufactured from ASTM Alloy 8620 and heat treated to Rockwell “C” 58-60.   Our gears are helical cut and very robust in comparison to other factory and aftermarket transfer cases.  We DO NOT utilize Synchronizers in our transfer case. 

 

Gear Selection

We offer multiple gear ratios for the Monster Box Transfer Case.  The 3-speed transfer case gear options are as follows:

  • 5.22:1, 2.97:1, and 1:1
  • 4.29:1, 2.44:1, and 1:1
  • 3.78:1, 2.15:1, and 1:1

 

Shafts

 

Like our gears, the shafts of the Monster Box are manufactured from ASTM Alloy 8620 and heat treated to Rockwell “C” 58-60.   We produce our output shafts in the Heavy Duty 32 spline configuration.  This allows you a wide range of yoke options to fit your individual needs.

 

Yokes and Flanges

 Because we use 32 splines on our output shafts, a large number of yoke and flange options are available to the consumer.  We offer the following:

  • 1310 Non-CV
  • 1310 CV
  • 1350 Non-CV
  • 1410 Non CV
  • 1350 CV Flange

Our shafts will also accommodate most 32 spline yokes and flanges from the aftermarket 4x4 industry.

 

Bearings

We use only the highest quality bearings available.  Our transfer case employs tapered roller bearings on ALL of the shafts, as well as caged needle bearings on all internal gear to shaft transitions.  We also use radial thrust bearings between all of the gears and shafts as well.

Fasteners

We use in excess of 30 3/8-16 Stainless Steel Socket Head Cap Screws in our assembly to guarantee a long and durable life.

Clocking

Our Transfer Case is clockable in 4 degree increments up to 360 degrees.  This allows the consumer to “fine tune” the installation for their particular needs.

               

Speedometer Plug Information

Front B Box Dimensions

Top B Box Dimensions

 


 

GEARING COMPARISON FOR DIFFERENT TRANSFER CASES
                   
Model Trans First Gear Low Gear 1 Low Gear 2 Low Gear 3 Axles Final 1 Final 2 Final 3
STaK 4X4 3 Speed NV3550 4.00 5.44 3.05 NA 4.56 99.22 55.63 NA
Atlas 4 Speed NV3550 4.00 2.72 3.80 10.33 4.56 69.31 49.25 188.42
Atlas II 6.0 NV3550 4.00 6.00 NA NA 4.56 109.44 NA NA
Atlas II  5.08 NV3550 4.00 5.08 NA NA 4.56 92.71 NA NA
Atlas II  4.3 NV3550 4.00 4.30 NA NA 4.56 78.43 NA NA
Atlas II  3.0 NV3550 4.00 3.00 NA NA 4.56 54.72 NA NA
Dana 300 NV3550 4.00 2.63 NA NA 4.56 47.97 NA NA
Jeep Dana 20 NV3550 4.00 2.00 NA NA 4.56 36.48 NA NA
Bronco Dana 20 NV3550 4.00 2.46 NA NA 4.56 44.87 NA NA
Jeep NP231 NV3550 4.00 2.72 NA NA 4.56 49.61 NA NA

 

LENGTH COMPARISON FOR 
DIFFERENT TRANSFER CASES
     
Model Length Weight
STaK 4X4 3 Speed 13.0" 153
Atlas II 5.08 13.8" 110
NP 203 21.5" 165
NP 205 13.0" 138
Dana 300 11.5" 86
Jeep Dana 20 10.5" 80
NP231 20+" 67

 

 

 

 
OPTIONS FOR STAK TRANSFER CASE

 

Shifters

We offer two different shifter configurations.  The first is our “Universal Shifter”. It consists of either two or three levers, horizontal to the front of the transfer case.  The consumer may pivot, shorten, and modify as necessary to fit their individual application.  The second option is our “TJ” Style shifter.  This shifter is designed to fit through the factory hole in a Jeep TJ.  Because of the innumerable variables in vehicles such as transmissions, long arm suspension systems, flat skid plates, Etc., slight modification to your floor or console may be necessary.

Parking Brake

A rear output parking brake is available as an option on all of our transfer cases.   This kit includes the rotor, caliper, mounting brackets, rear mounting flange, and all necessary mounting hardware.  You will need to supply a handle and cable to complete the installation.  Some driveline modifications may be necessary.  This kit can be retrofitted after the time of purchase as well.

Vehicle Speed Sensor

 Our VSS is a factory Jeep Rubicon sending unit.  It is a direct plug in to 2003-2006 Jeep Wranglers and is easily adapted to the 1997-2002 Wranglers.  If your application utilizes a mechanical drive speedometer, then you will need to replace your factory speedometer with an aftermarket unit like the ones from Auto Meter or Dakota Digital Our VSS sends three pulses per revolution of the rear output shaft.  If you need a different signal or pulse count, there are several aftermarket “signal converters” available.

 

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Part Number                    PART            

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22-30310 PARKING BRAKE

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22-30320 TRANSFER CASE MOUNT

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22-30351 1310 CV YOKE 30*

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22-30361 1310 NON CV YOKE 30*

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22-30362 1350 NON CV YOKE 20*

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22-30363 1410 NON CV YOKE 37*

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22-30352 1350 CV FLANGE 32*

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22-30330 ALUMINUM SHIFT KNOBS

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22-30340 SHIFTER BOOT
 
STAK WARRANTY

 STaK 4X4, Inc. warranties all of its assemblies and materials for 12 months from the date of purchase.  All STaK 4X4, Inc. items purchased from StaK4X4, Inc. or any of its distributors and dealers will be covered.  If within the warranty period the product fails due to material or assembly malfunction, STaK 4X4, Inc. will either replace or repair the malfunctioned product.  Any misuse of a STaK 4X4, Inc. product will immediately void the warranty.  STaK 4X4, Inc. reserves the right to limit the warranty for any racing or competitive use.

Any material or assembly malfunction must be returned directly to point of purchase for review.  If found defective by the reseller, such reseller will forward the malfunctioning item(s) to STaK 4X4, Inc. for further review.  If STaK 4X4, Inc. determines that the item (s) has malfunctioned, it will provide STaK 4X4, Inc. internal labor and replacement parts at no cost to the customer.  If STaK 4X4, Inc. finds no malfunction with the item, STaK 4X4, Inc. will either repair, at owners cost, or return un-repaired item to owner at owners discretion.

STaK 4X4, Inc.’s obligation under this warranty is to repair or replace at STaK 4X4, Inc.’s option, of the defective product.  Any cost for removal, installation, re-installation, freight charges, towing, or consequential damages are expressly excluded from this warranty.

STaK 4X4, Inc. will not be held responsible for any product returned without written authorization. 

This warranty shall not apply to any product that has been subject to accident, negligence, alteration, misuse or abuse.  This warranty gives you specific legal right and you may have other rights, which may vary from state to state. 

 

STaK 4x4 Terms and Policies

FIT and TOLERANCES: All parts sold by STaK4x4 are the results of countless hours of research, testing, fitting and refining. Jeep® vehicles have a large tolerance from vehicle to vehicle. In addition to the factory tolerances, most people install other than factory equipment (aftermarket add-ons). STaK 4x4 has done the best job we can to insure that our parts fit with some of the possibilities. However, you may find it necessary to grind, elongate, bend, or force the parts you buy to fit on your rig. Be sure that you want to install them before you modify them. Please use common sense when installing these parts and let us know how we can improve them.

 

 
HEAVY DUTY DRIVE SHAFTS

These heavy duty drive shafts are custom built for B.C. Broncos to our specifications. With full length 7" splines, they are made to work with long travel suspensions without overextending or bottoming out. Assembled with high quality components including Spicer U-joints. All of our drive shafts are custom made per your length just give us a call and it us usually shipped to you within 2 days.

TEC TIP: The most common reason for u-joint failure is due to over tightening the u-bolts, use a short wrench to avoid over tighten the nuts. The transfer case side of the drive shaft torque is 20-25, The differential side of the drive shaft U BOLT torque is 8-15. ( Ford 1977 truck shop manual )

ALL OF OUR DRIVE SHAFTS NOW COME WITH A FREE U-JOINT SAVER

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Part Number                    PART            

Price 

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25-11200 DRIVE SHAFT FRONT $279

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25-11100 DRIVE SHAFT REAR $279
 

 

 
EXTREME DUTY DRIVE SHAFTS

These heavy duty drive shafts are custom built for YOU With full length 7" splines, they are made to work with EXTREME long travel suspensions without overextending or bottoming out. Assembled with high quality components including Spicer U-joints.

TEC TIP: The most common reason for u-joint failure is due to over tightening the u-bolts, use a short wrench to avoid over tighten the nuts. The transfer case side of the drive shaft torque is 20-25, The differential side of the drive shaft U BOLT torque is 8-15. ( Ford 1977 truck shop manual )

 

ALL OF OUR DRIVE SHAFTS NOW COME WITH A FREE U-JOINT SAVER

 

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Part Number                    PART            

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25-11120 EXTREME ANGLE DRIVE SHAFT
 
 
U-JOINT SAVER

The U-joint saver keeps the caps on your u-joint. It prevents you from loosing a u-joint cup when you go to install a drive shaft at home It comes in really handy on your spair drive shaft, it really sucks when you go and get your spare drive shaft and a u-joint cap is missing or it is laying there but missing some of the bearings. This is the best tool for the money, it will save you so much aggravation and TIME.                                                                                                

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Part Number                PART                  

Price 

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23-00030

U-JOINT SAVER (1310 STANDARD FOR BRONCOS)

$5.99

 

 

 

 

 

 

 
TRANSMISSION & TRANSFER CASE HARDWARE

When you put in a new drive shaft it is a good idea to use new hardware, The upper bolts we carry are 12 point witch has a smaller head allowing you to use a 5/16 gear wrinch. The lower u-bolt kit are the correct ones for the stock 1310 type u-joint.

 

 TEC TIP: The most common reason for u-joint failure is due to over tightening the u-bolts, use a short wrench to avoid over tighten the nuts. The transfer case side of the drive shaft torque is 20-25, The differential side of the drive shaft U BOLT torque is 8-15. ( Ford 1977 truck shop manual )

25-30000 SPICER DRIVE SHAFT U-BOLT KIT (2 U BOLTS 4 NUTS 4 LOCK WASHERS) $9.99

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Part Number                PART                  

Price 

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22-21000

DRIVE SHAFT BOLTS

$1.99 EA

 

 

 

 

 

 

 

 
 


BC Broncos -110 Business Drive / PO BOX 69 Ingram, TX 78025
Tech line: (830) 367-1300 Order line: (888) 304-2945 <Fax: (830) 367-1304


PLEASE READ THE FOLLOWING

Before ordering products from B.C. Broncos, please read the following information, including warranty information and statement of liability. By placing an order to purchase products from B.C. Broncos, you are confirming that you have read and agree to our warranty and statement of liability.

INTERNET PRODUCT & PRICING POLICY
Due to the constant market changes, prices listed online are subject to change without notice. Additionally, sometimes parts will very from the picture shown due to slight manufacturing changes and or different sources.

WARRANTY POLICY
Within 30 days of receiving a product, if you find the product defective or incorrect, return it to B.C. Broncos. We will repair or replace any product found to be defective, subject to our inspection. Warranty is limited to the cost of the replacement part. Some items purchased from B.C. Broncos and built by other manufacturers may or may not carry warranty's issued by the manufacturer. B.C. Broncos is not a party to such warranty's, and all claims on manufacturer warranty's should be made directly to the manufacturer. No further warranty's are expressed or implied.

RETURNED GOODS POLICY
All items returned to B.C. Broncos which were originally paid for by credit card are subject to a 10% restocking fee.

STATEMENT OF LIMITED LIABILITY
Because B.C. Broncos has no control over the installation and/or other uses of our products, B.C. Broncos will not be held liable for personal, property, legal, or financial damages or claims stemming from the use or misuse of any product we manufacture or sell. The purchaser assumes all responsibility for the safety, proper installation, performance, and applicability of these products. If you have any doubts or concerns about the installation, function, performance or proper use of any of our products, please call our toll free number before proceeding with the installation or use of the product

SHIPPING POLICY
Please note: B.C. Broncos will not pay premium shipping for any reason. We will ship next day, same day, 3 day or any other premium shipping method that you like but you will have to pay the cost and take the risk that it will get to you when you want it and that it is what you wanted. We will do our best to get what you want to you when you want it. But premium shipping is extra work for us that we are doing for you as a favor and we make no money on any shipping and will not  refund shipping if things do not turn out the way you expected.

We hope you find some valuable information on these pages. If you need more information, give us a call or check back later. We will be updating often. Input for improvement on this page or our products is always welcome.