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Modern Driveline is a TREMEC Elite Distributor
Full Service authorized TREMEC Elite Dealer including repair center and Warranty repair.  

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General FAQ Index

Questions about TREMEC transmissions in general and the conversions they go into.



General Questions Page 1 / Page 2




  • Is it true that your transmissions will bolt up directly to my GM 'Muncie' or Ford 'Toploader' bellhousing?

    Yes. In the case of GM applications, any TREMEC Transmission labeled simply as "GM" or "GM Aftermarket", is intended to bolt directly to a GM/Muncie-style bellhousing. The same is also true of "Ford" or "Ford Aftermarket" models and Toploader bellhousings. However, this does not always take into account other variables such as pilot depth, the length and spline count of the input shaft, etc. For information regarding a specific application it is usually best to give us a call.

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  • I'm not too worried about fuel economy, so why should I care about overdrive?

    The overdrive feature of a TREMEC Transmission provides many benefits beyond exceptional fuel savings. First, the significant drop in RPM during highway use will greatly extend engine and accessory life. Second, cruising will be more pleasurable as cabin noise will be substantially reduced. Lastly, you'll never have to watch the competition blow past you on the highway because you're out of RPM ever again!

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  • Is it true that modern automatic transmissions are just as efficient as manuals?

    No. Although OEM's routinely try to make the case that because of modern computer controls, automatics are just as efficient as manuals, the truth is that no fluid-driven conventional automatic can achieve the same level of efficiency as one of our manual transmissions. Computer controls act merely to help keep an inefficient system at the peak of its efficiency. Automatics must 'launch' with an open or unlocked torque converter. Meaning that at every start, automatics are at their most inefficient state. At constant speeds one can more accurately compare the two, but when the same ratios are considered, manuals are always more efficient.

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  • Which of your transmissions can handle the most "power"?

    Our T-56 Magnum 6-speed is rated to accept as much as 700-lb. ft. of sustained torque in a vehicle weighing as much as 4,500 lbs. However, in a case where warranty considerations are not as great of a concern, it is important to note that TREMEC Transmissions can often handle substantially more power if the user practices common sense and understands the failure conditions of a given driveline part. For example: A four-thousand-pound-plus car launching at high rpm on drag slicks is more likely to cause a failure than a lighter weight, smaller displacement, street car on aggressive street radials.

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  • Is there a clutch lever boot available for scattershields?

    No, most manufactures do not offer them as these items are considered off road parts.

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  • How much checkout do you do on a transmission after rebuild?

    We make sure it shifts good, there is no movement in the shafts, and there is no noises. All parts are inspected before going into the tranny.

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  • If I'm converting from a C-4, what else would I need besides one of your packages?

    A clutch pedal (an option in the package) and drive shaft. We now stock new pedals for vintage Mustangs with a unique two piece design to simplify installation. We stock new drive shafts or you can shorten and re-balance the one you have.

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  • I have a 289 in a '67 Mustang. It may get stronger but never go over 300hp but might get to 300lbs/ft. What is the best package?

    For a little extra money the 325HP package contains a 10.5" King Cobra style clutch, but a 300HP package would also work just fine (10" stock organic clutch).

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  • My transmission is hard shifting into gear?

    In most cases the problem is the syncro's will not slow the gear down to allow the shift to occur. If this is allowed to continue the slide ring and gear will also need to be replaced.

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  • My transmission makes a lot of gear noise in all gears but fourth, what could be the problem?

    Most likely the input shaft and lower cluster have badly worn gears and should be replaced. The reason it does not make lots of noise in fourth, is the input and output shafts are locked together with no power applied to the gears.

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General Questions Page 1 / Page 2