Products: Driveline

Clutch

High Performance Clutches

In addition to stock type clutch kits and parts, we offer high performance clutches designed to handling the more rigorous requirements of  modified engines and uses that range from street performance to all out racing.

Testing has shown that the stock Volvo clutches cannot cope with power levels approaching or exceeding 200 HP, especially with drivers who like to show off their power with rapid starts and wheel spin. To solve this problem we are now stocking a line of upgraded clutch products including several different types of performance clutch discs and upgraded pressure plates.

The application of these parts is not limited to those cars equipped with turbos or superchargers. Within a range of products there are clutch discs and covers that are perfect for normally aspirated as well as turbo cars, including 240s and 740s. Disc choices include carbon fiber, kevlar, solid hub and button type discs. Clutch covers include those with ranging from stock  to 100% additional holding power. Package deals are available with our aluminum flywheels for a true performance clutch and flywheel setup.

Applicable to Volvo M40/41, M45/46, and T5 and T9 transmissions, 8.5 " diameter unless otherwise stated, others by custom order

• Stock Sachs Volvo 8.5 inch clutch kit  - pressure plate, disc and release bearing -  $197.50

• Light weight OEM type pressure plate $100 - This is a Sachs 240 style. 8.5 inch pressure plate. Recommended as an upgrade for use on earlier cars as it is lighter and stronger than the earlier style clutches used on the 544/122/1800/140.

• Our most popular clutch package - the above pressure plate with our severe duty organic disc - $240

• Dual spring pressure plate - $275  -  This is our older style PP made for us by Clutchnet. Good holding power but not recommended for cable clutch cars.

• 2 New and improved designs for 2007 include the following two clutch pressure plates. 

• Modified pressure plate and heavy duty clutch disc. Designed for street applications in the 200 - 250 HP range where a stock feel clutch is desired. This is a new product designed and tested in 2006 and is superior to those available previously -  $400 with heavy duty organic disc.  $455 with kevlar disc recommended where semi race use is expected.

• Dual disc street, street/race, or pure race clutch designed for higher HP ( 250 + ) applications. Available with several different disc types depending on use.  Adding a second 8.5" disc is the solution to having sufficient disc area and still fit in the stock bellhousing. Uses the stock 8.5 inch pressure plate bolt pattern. This clutch can do it all - handle high torque loads ( 350 ft.lbs + ) and abuse, but with a street clutch feel & normal clutch pedal pressure.  The weight of 13 lbs with discs is less than a stock single disc clutch with disc. Price depends on the disc type and input shaft splines  - $925  - $975 including discs.

• Street performance clutch discs - several types available from $140 - $195

• Severe duty organic discs- $140

• High performance kevlar discs - $195  availalbe with solid or sprung hubs

• Race type performance clutch discs - email for details

• Tilton race clutches - email for details

 

Dual disc clutches - Tilton 7.25" race - top, Our VPD 8.5" street or race  - bottom

 

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Aluminum Flywheels

Lightening the rotating mass is critical for high performance. The most significant weight reduction available is in the flywheel. This is a performance improvement that will help everytime the engine accelerates. Our aluminum flywheels are normally for RWD Volvos, but others can be provided on request.  Street AL flywheels are usually less than half of the stock weight. Race AL flywheels less than 1/3 stock weight.

• Street Flywheels  - 8.5 inches - 9 lbs. ( stock flywheels are 22 lbs. or more!) Can be used on all rear drive Volvos - Specify 6 bolt ( ‘ 73 and earlier ) or 8 bolt ( ‘ 74 and later ) crank - $450  Can also be used as a race flywheel with our single and dual disc 8.5 inch clutches. For severe race applications contact us regarding upgrades or order the race version below. 

• Race Flywheel for 7.25" Tilton clutch - 6 lbs. $560 ---  Versions for 5" and 8.5 " also available. Made from a different alloy than our street flywheels in order to handle the increased stress of race use. 

For precision balancing add $60. The flywheel should be balanced with the clutch pressure plate to be used. Aluminum flywheels often require a longer release bearing and/or clutch fork pivot modification. Email for details.

Six and eight bolt street aluminum flywheels for 8.5" clutch - 9 lbs.

 

Race flywheels for 7.25" and 5" clutches.

 

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Rear End Gear Sets

Increase your rearend ratio for race or rally. Decrease the ratio for highway cruising. 3.73, 3.90, 4.1, 4.56, & 4.88 ratios available for the Dana 30 - $220

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Limited Slip Differentials

For Dana 30 rear ends - 27 spline - all disc brake 1800s, 140s, 240s, etc. we recommend the Truetrac® Limited Slip. The Truetrac® is Tractech’s limited slip differential . This is an all gear driven differential that automatically provides smooth torque transfer for traction on demand. The Truetrac® provides durable and dependable performance with no loss in power and no clutch plates to wear out. We use and recommend for both our street and racecars - $540.  There is also an installation kit with includes shims, etc. - $50 . 

The original equipment disc type Dana “Powr-Lok” is not currently available.

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Rearend Conversions

The most common conversions address the safety problems associated with the rear drum brake cars. Unfortunately, breaking of the rear axles on drum brake cars has been a continuous problem in Volvo performance applications since the '50s. As the power and handling of these cars have improved, the stresses on this comparatively weak component has increased the rate of breakage. In vintage racing, most cars raced for more than a season with the original axles have suffered breakage and serious consequences. Options involve either the replacement of the rear end with a Volvo disc brake housing, or modifying the original housing to use Ford axles and drum brakes as was done on my race car almost 20 years ago. ( It still out-brakes the disc brake rear cars.) As most vintage race clubs now allow the conversion to rear disc brakes as a safety upgrade, we no longer offer the Ford drum conversion kit. For 67 - 69 1800s and 122s the disc brake rearends from 70 - 73 1800s will bolt right in, though some extra work is needed to hook up the brakes and convert to the same bolt pattern as in the front. If you need help with this, sourcing a rearend, or converting the bolt pattern, let us know..

 

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