• Classic Mustang
  Five Speed Transmission Swaps

  Swapping a five speed transmission into an early Mustang, Falcon, Cougar, or almost any early Ford could not be any easier these days.  Many of the five speed transmissions found in late model Mustangs can be installed with little modification. .
  

• 1965 - 66 Mustang
  
  For a 1965 - 1966 Mustang we recommend a T-5 transmission for engines making under 450hp. The T-5 fits much better than a larger TREMEC 3550 or TKO due to clearance issues with the transmission tunnel.  TREMEC transmissions can be installed but it requires modifying the transmission tunnel.  A T5 swap in these cars is straight forward whether swapping an automatic or a Toploader.  Even the inline-6 transmissions can be swapped with a T5.  The only modification needed to install a T-5 is to clearance the right side of the shifter opening by 3/8".  
  
  Making over 450hp?  There are now aftermarket T-5 gear sets that can handle up to 600hp!  A T5 Swap is now possible with these high horse power early cars.  Give us a call for more details.
  
• 1967 - 73 Mustangs

  1967 - 1973 Mustangs have all the same options as the 1965-66 Mustangs.  There are, however, additional five-speed transmissions available from TREMEC.  The 3550, and TKO models (only used available) and the new TKO 500 and TKO 600. 
  
  These transmissions are larger and heavier than a T-5 or four speed and require more transmission tunnel room found in these larger cars. The TREMEC 3550 and TKO500 have the same bolt pattern as 3 or 4 speeds but have the same longer 10 spline input shaft as the T-5. The reason the input shaft is longer is to provide additional clearance needed for the cable operated bellhousings used in today's model Mustangs.  Knowing this, we offer shorten input shaft TREMEC's that will bolt up to a stock 3 or 4 speed bellhousing without the use of an adapter plate.  This is the easiest approach when replacing a dated 3 or 4 speed.  Not using an adapter plate also means there is no increase in the overall length of the transmission so the drive shaft length remains unchanged. 
  
  Shifter location on a TREMEC lines up with the opening in the floor with a conventional long input shaft.  With the shortened input shaft the shifter is slightly forward requireing a little more clearancing of the tunnel.  It is not recommended to use the shortened input shaft with cars with consoles as the shifter is move too far forward relative to the console.  Some of the additional parts needed to swap a 3550/TKO into a 67-70, or 71-73 Mustang/Cougar is a TREMEC cross member, as the mounting position is further back, a shorter speedo cable, speedo gear and shifter lever and ball. 
  
  For Mustangs making more than 450hp, the TREMEC TKO and TKO600 is the next step up with a 26 spline input shaft and a 31 spline output shaft.  The overall layout is the same and again with a shortened input shaft, the TKO can be bolted to any small or big block early bellhousing.

 

 

 

World Class T-5

 

 

 

84-93 T-5 V8 Bell Housing

 

 

 

65-66 Mustang Cable Kit

Mustang T5 Cross members