Rear Differential Rebuild Service for your BRZ / FRS / GT86

This service inclues:
4.44 Final Drive Ring / Pinion Gear Set
Pinion Bearings
Input Seal
Axle Output Seals
Cleaning / Inspecting / Assembly Labor

Want to see how the 4.44 ratio compares to the stock 4.100 or the 4.67? See the chart below:

 

Gear Ratios    Stock 4.100:1   4.44:1    4.67:1  
1st Gear   3.626   3.626   3.626  
2nd Gear   2.188   2.188   2.188  
3rd Gear   1.541   1.541   1.541  
4th Gear   1.213   1.213   1.213  
5th Gear   1.000   1.000   1.000  
6th Gear   0.767   0.767   0.767  
               
The following speeds are based on an OEM tire diameter of 24.62"
               
    3000 RPM   3000 RPM   3000 RPM  
1st   15mph   14mph   13mph  
2nd   25mph   23mph   22mph  
3rd   35mph   32mph   31mph  
4th   44mph   41mph   39mph  
5th   54mph   50mph   47mph  
6th   70mph   65mph   61mph  
               
    5000 RPM   5000 RPM   5000 RPM  
1st   25mph   23mph   22mph  
2nd   41mph   38mph   36mph  
3rd   58mph   54mph   51mph  
4th   74mph   68mph   65mph  
5th   89mph   83mph   78mph  
6th   117mph   108mph   102mph  
               
    6000 RPM   6000 RPM   6000 RPM  
1st   30mph   27mph   26mph  
2nd   49mph   45mph   43mph  
3rd   70mph   64mph   61mph  
4th   88mph   82mph   78mph  
5th   107mph   99mph   94mph  
6th   140mph   129mph   123mph  
               
    7000 RPM   7000 RPM   7000 RPM  
1st   35mph   32mph   30mph  
2nd   57mph   53mph   50mph  
3rd   81mph   75mph   71mph  
4th   103mph   95mph   91mph  
5th   125mph   116mph   110mph  
6th   163mph   151mph   143mph  
               
    7500 RPM   7500 RPM   7500 RPM  
1st   37mph   34mph   32mph  
2nd   61mph   57mph   54mph  
3rd   87mph   80mph   76mph  
4th   111mph   102mph   97mph  
5th   134mph   124mph   118mph  
6th   175mph   161mph   153mph  
               
    8000 RPM   8000 RPM   8000 RPM  
1st   39mph   36mph   35mph  
2nd   65mph   60mph   57mph  
3rd   93mph   86mph   81mph  
4th   118mph   109mph   130mph  
5th   143mph   132mph   126mph  
6th   186mph   172mph   164mph  
               
    8500 RPM   8500 RPM   8500 RPM  
1st   42mph   39mph   37mph  
2nd   69mph   64mph   61mph  
3rd   99mph   91mph   87mph  
4th   125mph   116mph   110mph  
5th   152mph   140mph   133mph  
6th   198mph   183mph   174mph  

 

 

Specs
Heavily Worn or Damaged <h4>HEAVILY WORN OR DAMAGED UNITS</h4> <p>Any additional parts needed which are not listed or not part of this build will cost extra to replace. We will email pictures and detailed information if this is the case. We know you do not like surprises, so we try to make this process as painless as possible. If this turns out to be the case, though, please keep in mind that we just want you to have a high quality built assembly. Having your vehicle down is bad enough, so why cut corners and risk it again? Quality is the key here and sometimes it costs more to do this on a specialty or aging platform. Simply put, it is not worth the risk of using a sub-par component if an inspection reveals it is a weak link. </p> <h4>ATTENTION TO DETAIL</H4> <p>All machine work and cleaning is performed in-house. We also spend a lot of time on synchro timing, alignment and operation to give you the best shift possible. Click -> <a href="news/technical-articles/795-synchro-blueprinting">Synchro Blueprinting</a></p> <h4>SHIPPING</h4> <p>Shipping your Transmission (or complete car) to us is simple! Most assemblies are shipped in a double walled custom made box. Your assembly will be sitting snugly, and safely, in preformed foam pads to assure safe delivery. </p> <p style="text-align: left;"><img alt="" src="images/Product_Desc/DSC05481_medium.jpg" /> </p> <p> In certain situations, though, we may need ship via a freight pallet. Please <a href="mailto:%20sales@jackstransmissions.com">email</a> or call us if you have shipping questions or for a quote. </p>
Cleaning Disclaimer <p>Jacks Transmissions has grown into a company which now services exotic and terribly complex DCT (dual clutch transmissions) used in the GTR, SST, Porsche, Audi, VW, and many more high end vehicles. Due to this exciting change, we have spent a lot of money for the state-of-the-art equipment needed to service these high dollar and expensive units. We have also designed and built many of our own parts for these vehicles.</p> <p>All machine work, cleaning, and detail work is performed in-house by very talented technicians and engineers. The quality you get from Jacks Transmissions is an unbelievable bargain. We do not know of anyone else who cleans the transmission via a 110gal Ultrasonic and Pulse-Jet unit, or who employs such talented people. </p> <p>Exceptionally clean units are one of the many reasons why our Transmissions and Transfer Case assemblies are of the highest quality in the business! We have <a href="news/technical-articles/687-cleaning-equipment">state-of-the-art cleaning equipment</a> which other transmission builders and service shops could only dream of. </p> <p>With the best cleaning equipment, we also have a very clean facility. All units are built in a spotless environment using tools, and benches, which are clean and only used for assembly purposes. In other words, the same tools used to pull your dirty old transmission out of your car are NOT the same tools used to rebuild your pristine unit afterward. Take a look at the typical shop and check their tools. It is shocking how dirty things are in most shops and that dirt will end up in your unit. That does not happen here.</p> <p>The quality and experience you get from Jacks Transmissions shows with the overwhelming number of high-end vehicles we service in our shop. Be a part of the rare opportunity to have one of the cleanest and most experienced specialty shops in the World service your transmission! </p> <p>Our pricing structure was created to assure only the highest quality materials and workmanship. Anyone which beats our price is taking short-cuts which you will pay for in the end. Look into the details of our build services and you will see the additional attention we provide which is unique and cannot be duplicated.</p>
Core Exchange <h4>CORE EXCHANGE SERVICE</h4> <p>Please <a href="mailto:%20sales@jackstransmissions.com">EMAIL</a> us for price and availability. Many of the build services we offer can be performed on an 'exchange' basis. Core charges and core convenience fees are separate from the costs of the build service. In many cases, core fees can be refunded pending the condition of what we receive in exchange. Note: We will retain a 10% convenience for this service.</p>
Optional Upgrades <h4>WPC GEAR TREATMENT</h4> <p>WPC is a permanent surface treatment that reduces friction while strengthening the part. Its unique micro-dimple formation pattern greatly reduces friction and is unmatched by conventional methods of surface treatment. It is a proven process that has been utilized for many years in the racing and automotive industry and is complimented by utilizing our Micropolish treatment. WPC can strengthen parts in two ways. First it adds an extremely high level of compressive stress at, and near, the surface. The second, is that the WPC treatment creates a Nano - Crystalline structure at the surface of the metal. Both of these mean that metal fatigue and crack initiation are both noticeably reduced; thus strengthening the gears and shafts inside of the transmission.</p> <h4>MICROPOLISH</h4> <p>Micropolishing is a gentle polish on the gears that will smooth and remove some stress concentrations uniformly. It also polishes the gears in the area they make contact with other parts, so you have less friction loss which means less heat, better fuel economy, and longer life. </p>

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Rear Diff Build Service 4.44 Final Drive - BRZ / FRS / 86

  • $1,525.00


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Tags: rear diff, brz, frs, gt86

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3920 North Weber Street Colorado Springs, CO, 80907

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