Put overdrive in your Classic vehicle. Conversions of automatic or manual transmissions.  We specialize in TREMEC T5's, TKO and T56 Magnums.


"Five/Six Speed Conversion Specialists"


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Modern Driveline is a TREMEC Elite Distributor

 Modern Driveline is a proud member of SEMA

For help and guidance check out Tech Alley.
When you are ready to order review our ordering options in Customer Service then check out the Product Catalog. 

Have Questions? Send us an email with your details.

Note: If you already have a transmission, check out our transmission specs page to be sure the type you have will meet the torque your engine is providing.  


Tech Alley                              "Classic with modern convenience"

  • The many ways to a 5 speed conversion

    Installing a five speed transmission into an early Mustang, Falcon, Cougar, 2x4 truck, hotrod, Cobra or almost anything, could not be any easier these days. Many of the five speed transmissions found in late models can be used in a swap with little modification. There are several good five speed transmissions to choose from. The Borg Warner/TREMEC T5, TREMEC 3550, and TKO, and the new TKO 500, 600. T-45 transmissions found in 1996-99 4.6L Mustangs are limited to just that 4.6L as the bolt pattern is completely different than that of Windsor blocks.  4.6L motors are not limited to the T-45 as there is a bell to install a TREMEC behind a 4.6L mod motor.  More on that later.  All of the transmissions offer a 5th gear over-drive to reduce engine rpm and for improved mileage while weighting less than their automatic or four speed counterparts.

    There are three ways to approach a five speed swap: 

    • Use an early 3 or 4 speed bell housing with an adapter plate allows an easy T5 swap, 

    • Use a late T5 or TREMEC TKO bell housing, which allows each transmission to be bolted directly to the bellhousing without the use of adapters or spacers, 

    • Use an after market scatter shield, which adds additional safety and sometimes the only bellhousing  available for an application.

    Which conversion choice you choose depends on what parts you are starting with and how you set up the clutch linkage.


  • Swap from automatic to T5 with a small block

  • Conversion of manual transmission equipped cars

  • Swap from automatic to TREMEC TKO with small block

  • Conversion from automatic to TREMEC TKO with big block

  • Classic Mustang Transmission T5 Swap

World Class T-5.  The basis for a T5 swap.
84-93 T5 V8 Bell Housing

early mustang cable kit

65-66 Mustang Cable Kit.  Cable kits make a T5 swap a breeze. 


threecrossmember65-70.jpg (51467 bytes)

Mustang T5 Cross members.  A T5 swap can't be done without one.

 Last edited: 2013-02-22 16:04