VW DSG Transmission Imagine two manual gearboxes side-by-side in the same casing with a pair of independent clutch packs sliding back and forth between speeds, guided by hydraulic pressure and electronic components. In a nutshell, that’s what a VW DSG transmission is. One pack drives the odd-numbered gears and the other powers the even-numbered ones. The packs are each made up of four small plates that work in unison. The packs are “wet,” meaning that they’re immersed in the gearbox oil, which fights friction and cools the massive amounts of heat the system creates. The driver controls the action with a floor-mounted lever (or paddle shifters) that has the following settings: PARK – All gears and clutch packs are disengaged. NEUTRAL – Same settings as PARK, except that the parking lock is no longer engaged. DRIVE – Gears and packs engage as the driver accelerates. SPORT – Vehicle functions as in DRIVE, except that up- and down-shifts occur at higher engine speeds. REVERSE – Vehicle goes into the single backwards setting. DSG Transmission Manual Mode This is where it gets fun. The driver can work her way from 1 to 6, just like with a stick shift, but with no floor pedal to worry about. This mode offers additional control in bad weather along with the chance of enhanced fuel economy. Plus, as we’ve already discussed, it’s just plain fun.


The 8HP is an eight-speed automatic transmission built by the ZF Friedrichshafen Company. The 8HP comes in a number of varieties, including the 8HP30, the 8HP45, the 8HP55, the 8HP70 and the 8HP90. The weakest of the varieties, the 8HP30, can handle up to 300 N-m of torque. The strongest–the 8HP90– can handle an unbelievable 900 N-m of torque.  The 8HP was designed to replace the 6HP transmission–a six-speed automatic– mainly to obtain better gas mileage in the vehicles it was used in. This transmission first went into production in 2008 and remains in production today.  The 8HP has a very steep 4.69:1 ratio first gear (excellent for quick take-offs), and a very generous overdrive ratio of 0.66:1 (great for maximizing gas mileage). A different version of the 8HP can be found in a wide variety of vehicles, including the Audi A4, the Bentley Mulsanne, the BMW 3 series, the Chrysler 300, the Dodge Durango, the Jaguar XF, the Lancia Thema, and the stellar Audi A5.


The 8HP is a very modern 8 speed transmission automatic transmission built and designed by ZF Friedrichshafen AG. It has a very steep first gear ratio of 4.696:1 and a very generous overdrive gear of 0.667:1. This help immensely with off the line performance and gas mileage. This transmission can handle very high horsepower motors with a torque capacity of 516 lb.ft. It weights a mere 200 lbs, which is fairly light in weight for a transmission of this strength. The transmission is unique because it is not designed by a single automotive brand. Instead, it is designed by an aftermarket company and used in many different makes and models. It can be found in the Audi A6 and the Q5, the Bentley Continental Flying Spur, the BMW 7 series and the X5, The Dodge Challenger, The Jaguar XF, the Jeep Grand Cherokee, the Maserati Ghibli, The Ram 1500, the Rolls Royse Wraith and the Volkswagen Amarok. It was also found in the Ranger Roger Sport.

ZF6HP26 Transmission Maintenance



The 6HP26 is a six speed automatic transmission made for BMW by the ZF Friedrichshafen AG Company. It uses a special planetary gear set that can provide more gear ratios while making the transmission lighter than its predecessor — a five-speed transmission. This transmission is used mainly in high-end luxury vehicles, but it has recently found its way into some not so high-end luxury vehicles such as the Hyundai Genesis. Rated for use in motors that put out as much as 440 Ft Lbs of torque, it is a fairly heavy duty transmission. The 6HP26 comes with a very steep first gear ratio of 4.17:1, which is great for quick jack rabbit starts. It also comes with a 0.69:1 ratio overdrive gear, which helps the car it’s used in get better gas mileage as well.  First put into production in 2001, this transmission is still being produced today.  The 6HP26 can be found in a wide variety of vehicles, including the Jaguar XKR, the Jaguar XJ, the Ranger Rover, the Rolls Royce Phantom, the BMW 5 series, the BMW 3 series, the Maserati Quattroporte, the Kia

Mohave, and finally, the BMW X5.

BMW X5 (Wiki)

The BMW X5 comes with a 6HP26 automatic transmission.

The BMW X5 is a mid-sized, luxury SUV. Some even refer to it as a crossover vehicle, due to the number of car based components used in its construction. This SUV features four doors, a rear hatch gate and seating for up to five adults. It’s available with both gas and diesel straight six engines, along with a more powerful V8 option. Being that this is a luxury vehicle, it comes standard with a high-grade leather interior and all the latest technology based bells and whistles.

The X5 is by no means an inexpensive vehicle. Vehicles this expensive need special care, especially when it comes to its very sophisticated automatic transmission. If your goal is to maximize the usefully lifespan of your BMW X5, then you should take note of this important advice. Here is how to keep the 6HP26 transmission running strong in your X5.

Change the transmission fluid often.

While the factory may tell you it’s OK to go longer in between transmission oil changes, I highly recommend that you have the transmission fluid replaced every 30, 000 miles. If you drive your X5 hard, reduce that to every 25,000 miles. Another good recommendation is to replace the organic oil based fluid with a good quality synthetic fluid. Synthetic fluids do a much better job at protecting your transmission from everyday wear, and are much more resilient to the negative effects of excessive heat.

Change the transmission filter.

Every time you change the transmission fluid, you should change the transmission filter. Many times the old filter won’t look dirty to the naked eye, but trust me it’s probably full of fine, transmission damaging debris.  It’s best to use an OEM quality filter when replacing the old filter. Cheaper filters are known to not meet the ridged factory requirements for filtration.

Sooner or later, due to high mileage or abuse, you will be faced with the decision to replace the 6HP26 transmission in your BMW X5.


Trans Specialties Remanufactured Transmissions

Remanufactured transmissions are reconditioned using parts that are still within specification and replacing only worn or defective components. Trans Specialties uses state of the art manufacturing processes and testing to ensure that each transmission is built to the highest level of quality. The parts for each transmission are thoroughly inspected and the completed units are tested for complete operation with its torque converter to ensure that it is ready for installation

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