The following installation notes are a summary only.
For more detailed installation information,
call.
Installation Information:
- Tunnel fitment. The TKO will fit within the tunnel of a 1955-57 Chevy.
- Shifter location. There are several shifter positions that can work for '55-'57 Chevys. You can use either of the two rearward shifter location offered by the TKO (19.5” & 16.75” back from the front of the transmission). If you have bucket seats, the 19.5” position will work fine. Alternatively, if you have bench seats the 16.75" shifter location or the mid-shift location are the correct choices. Using an offset shifter is also a popular option.
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TKO shifter mounted in the 16.75" position. |
Shifter mounted in the 16.75" position
in a bench seat car. |
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Shifter installed in the 16.75" position.
The marked position shows where the
mid-shifter would be positioned. |
Optional offset shifter in the 16.75" position. |
- Crossmember & transmission mount. You will need a custom made crossmember designed specifically for the TKO conversion. A custom crossmember along with a polyurethane transmission mount are included with each TKO kit.
- Bellhousing & clutch linkage. Your stock clutch linkage and bellhousing will work with the TKO.
- Driveshaft. You will need a new, shorter driveshaft with a 26 spline slip yoke. A new driveshaft with slip yoke and ujoints is included with each TKO kit.
- Speedometer and reverse lights. You will need a custom speedometer cable that is compatible with the TKO as well as your stock speedometer gauge. The TKO also has a provision for an electric speedometer. An electric speedometer wiring harness or a custom speedometer cable with the correct speedometer gear for your rear tire size and rear gear ratio is included with each TKO kit.
- Clutch components. You will need a 26 spline clutch Disc. Replacing your pressure plate and clutch Disc at the same time is recommended.
Select Your Conversion Kit
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We are confident that installing a Tremec overdrive transmission will be one of the best improvements that you can make to your Classic Chevy and your driving experience will increase greatly because of it. With this in mind, it is also important to understand that anytime you install non-stock parts, of any type, in your car, it is possible that things will not go exactly as planned and that some minor modifications may be required to your car or to the kit parts in order to achieve proper fitment. Because of slight variations on the production line when your car was built, past modifications to your car by previous owners, past accidents that your car may have been involved in, and after 30+ years of time on the road, each car is slightly different or unique in its own way.
We have made every attempt to make our TKO kits in such a way that no, or minimal, modifications are required and for majority of installations this is the case. However, it is important that you proceed with your installation knowing that, while not likely, some modifications other than those that have already been clearly stated, may be required.
While we are confident that you will be extremely happy with your new TKO overdrive transmission, it is important that you understand the potential realities with this install before you make your purchase rather than have you find out after the fact. Please proceed with your TKO kit purchase with this in mind.
