69-70 COUGAR 5 & 6 Speed Conversions

Categories: , , SKU: 69-70 COUGAR 5 & 6 Speed Conversions

















Offers  five and six-speed conversions for
Small Block, Big Block or Mod Motor Swapped Galaxie

Our line of products offers simple ways to upgrade your 3 or 4-speed
to a Tremec five-speed or a complete automatic to five or six-speed overdrive.
We have you covered.


  • Increase in fuel economy with overdrive.
  • Lower RPM’s for more drive-ability and a much quieter in-car feeling. 
  • Reduce wear on your engine & drive-train
  • Reduce engine temperatures, promoting a longer-lasting engine.


Experience the MDL Difference,

  • We extend Tremec’s factory warranty by an extra year.
    And add a 1-year grace period.
  • We offer the best in the industry customer service.
  • When you purchase a complete MDL Conversion Package you get, lifetime technical support.

Inline Six-cylinder conversions

By 1967, Ford settled on the 3.03 three-speed with the wide pattern “Toploader” pattern.  The three-speed was budget-minded and were great in their day,  Fast forward today, these same transmissions are worn out are in the need of replacement.  The answer is a Tremec T5 five-speed with an overdrive.  This allows the Cougar to travel comfortably at highway speed at mid 2,000 rpm range.  Installing a T5 into a classic Cougar is easy.  Using most of the three-speed parts like the bellhousing, flywheel, and clutch linkage, all that is needed is a new conversion clutch, adapter plate, T-5, crossmember, and a few other supporting parts.
No tunnel modifications are needed and the shifter location is retained.

If there are 2 starter bolts this means the flywheel is a 136 tooth with a 9″.
MDL has the T-5 adapter plate that to make this conversion easy.

OK, your classic Cougar is equipped with an automatic.
MDL has
69-70 COUGAR 5 & 6 Speed Conversions to make this easy.
Our T-5 conversion kit includes hard-to-find items like:

  • a new inline six-cylinder flywheel
  • conversion clutch
  • reproduction easy to install clutch pedal
  • the correct slip yoke for ready to bolt in driveshaft
  • and everything in between.

V8 Conversions

Manual to Five Speed

Six bolt 289/302/5.0L equipped

Mid-year 1966 released the six-bolt blocks that carried through 302 and 5.0L HO of the ’90s.  With this change comes the wide pattern “Toploader” four-speed.
Modern Driveline’s adapter MD-401-2102 bolts to the bellhousing to allow the Fox-body T-5 bolt right up using all the stock clutch linkage.
Another option to installing a T-5 behind a six-bolt block is the fox body T-5 bellhousing.
With this bellhousing you don’t need an adapter plated and you can use a 157 tooth flywheel from the 3 or 4 speed.

With a T5 bellhousing you have three choices in the clutch linkage.  Stock mechanical linkage, cable, or hydraulic.

Mechanical linkage

T5 bellhousings are designed for cable release and are deeper.  To install a mechanical fork, a fulcrum kit is required to mount the fork.
The kit has a spacer to keep the fork in the same location.
MDL can predrill the mounting holes for you with our fixture to ensure the mounting hole location is correct.

Cable clutch release

Since T5 bellhousing is designed for a cable release, a matching fork is required. It is important to know the 3 or 4-speed mechanical release clutch can no longer be used as it will be too tall.
MDL offers cable release clutches for the 10″ long pattern and the 10.4″ Metric bolt patterns.  The pressure plate lever height is lower and the release is faster.
To use the stock clutch pedal, MDL engineered a cable kit that bolts to the 67-68 Cougar pedal and comes complete with a firewall plate, custom double adjustable cable.
The clutch cable is routed around the exhaust system and down along the oil pan to the clutch fork

69-70 Mustang/Cougar Clutch Cable Kit



Hydraulic release
MDL developed a complete line of hydraulic clutch release systems we call our LF (Light Foot) Series.
The master cylinder mounts on the firewall using the mechanical linkage that connects to the stock clutch pedal.  The linkage provides proper leverage and control while providing design flexibility.
Using the T5 and cable fork, our external slave cylinder mounts the back of the bellhousing pushing the fork forward.
Our hydraulic system provides the most exhaust clearance while providing the softest pedal effect.

Here’s How… To Get A light Clutch Pedal with MDL’s LF-Series Hydraulic clutch System

If you are undecided as to which clutch release system is right for you, we can help you through the process of what right for you.   208-453-9800


TKX Five Speed Single Overdrive Conversion up to 750hp



For higher torque applications or you’re a ‘spirited driver,’ the TKX series five-speed is the latest offering from Tremec
check out these stats.

Rated for 600lb/ft of torque, will support shifting up to 8000rpm thanks to triple cone hybrid sintered synchronizers that the Tremec T56 Magnums have to make your driving experience the best.

The new end loading design makes for a stronger case with a new sleeker profile, eliminating top covers, that would have restricted room in the tunnel.


From the still photos below, you can see the clearance you can expect with a stock cross-member & mount.



Click here to read more about the TKX


Above you can see the differences between the TKO & TKX cases

The TKX offers a little more adjustment approx. 5/8″ at the tail shaft vertically for the driveline angle.
Perfect for Pro-Streeters who love to tuck the rear suspension up into their ride.

A great addition to the install is the MDL Crossmember item# MD-6773M-LPTKO and a new mount, this will maintain the transmission angle as well as providing superior clearance for exhaust and a locating arm for your emergency brack cable.

TKX Five Speed Single Overdrive Conversion

The big brother Five speed.  Perfect for those of you running a high-powered small block or big block.  Tremec developed the TKX to be as much of a direct bolt replacement for the wide pattern Ford Toploader and input shaft features.
For 69-70 Cougars, it is best to keep the standard length TKX input shaft to keep the shifter back the shift hole.
We do this by using a 3 or 4-speed bellhousing to TKX spacer or switch to a TKX bellhousings.
MDL offers a wide range of bellhousing for SBF, FE, 429 series blocks.

TKXs are offered in two gear ratio gear sets.  The TKX comes with a 3.27:1 first gear with a .72:1 OD. And the TKX is considered the close-ratio with a 2.87:1 first gear with a .68:1 or .81:1 OD.
For small blocks, the TKX will fit in the transmission tunnels with the use of an MDL TKX crossmember and standard top covers.
Since big blocks fit differently, it best to use our low profile top covers and low profile cross member for additional clearance.

T-56 Magnum Six-Speed Double Overdrive Conversion

Magnum Six-speed is the top of the heap when it comes to manual overdrive transmission with it brute strength of 700ft/lbs and two overdrive ratios.  In order to fit a Magnum is a 69-70 Cougar the tunnel has to be enlarged, once the is accomplished, the sky is the limit.  The T-56 Magnum can be bolted behind just about any power plant you can dream up.  From a SBF to a Big block or Module Coyote, the Magnum Six-speed with handle high load down the strip or just pro-touring the open road.
Our conversion package is very complete with many choices to custom-tailored the six-speed to meet your needs.  With the Six-speed we highly recommend our LF series hydraulic clutch release for a light soft-pedal that provide lots of header clearance.

In just 15-20 Minutes we can build you a detailed custom quote for you to review.

FORD Tremec T56 Magnum 6-Speed Transmission TUET11010 2.66 FIRST .80/.63 OD

Automatic or full conversion packages

Modern Driveline has perfected the automatic to five-speed conversion.  When you contact us we will ask you a shortlist of questions to better understand your needs and wants. Using our complete line of products, we can offer you everything you need to remove an automatic or completely replace the stock 3 or 4-speed gearbox.  If your project demands everything from scratch, we’ve got you covered.

When removing an automatic, nothing remains.  Our automatic kit provides everything from the block to the second u-joint.  It is important to know which balance crank is installed in your motor.  289/302 up to 1980 from the factory were 28 oz imbalanced.  All 5.0L from 81-95 are 50 oz imbalanced unless the crank as been changed.  Today there are many are building zero balanced SBF like Ford Racing.  Let us know what you are planning to run.  We will suggest the right clutch to run based on your horsepower and driving style.  In most cases, we can have a detailed quote prepared for you in under 15-20 minutes.

Converting from Auto to 5-speed or If you just want more drive ability from your manual transmission mustang or want to make it more modern with a 5 or 6 speed we can help with that too.

69-70 COUGAR 5 & 6 Speed Conversions are TAILORED to your needs with many or all of the following:

TREMEC 5 or 6-Speed Transmission with Shifter

The MDL conversion packages are as complete as possible.
You get ALL the components you need where competitors packages provide only the basics.
When comparing costs be sure you are comparing apples to apples on the contents, quality & after the order service

Check out our HOW TO page, just click this link

We also Have OIL COOLERS   click this link to find out more



Components are IN STOCK