|Over the years,
Bow Tie Overdrives has built thousands of 700R4 and 2004R automatic
overdrive transmissions. During the same period of time, we never
worked on or rebuilt any other model of automatic transmission (Not
even the Th-350's or Th-400's). Our business has, from day one, been
dedicated to only GM rear wheel drive overdrives, not just building
and selling them, but installing them. We have five installation bays
that are used almost exclusively for custom installations. Our custom
installation business has grown so much we cannot do stock rebuilds
any longer. Our company has installed, or been actively involved with
the installation of thousands of these transmissions into Pickups,
Hot Rods, Classics and Street Machines of all kinds. We now offer
very extensive installation kits for Corvettes, Chevy II's, Novas,
Camaros, Impalas, Chevelles and most 60's and 70's Pick Ups. If you
have an unusual application, we can probably help, since we've more
than likely been there and done that! We maintain a very large inventory
of all the accessories needed for most installations: dip sticks,
dust covers, TV cables, speedometer setups, crossmembers and shifters
to just name a few of these items. If you need it, we more than likely
have it in stock! We also stock most adapters for the popular four
wheel drive conversions like the 1968 through 1981 Pick Ups and Blazers.
ourselves to the custom installations of Th-700R4's, we quickly discovered
something, the biggest issue with custom installations was getting
these transmissions to respond in a predictable manner every time.
In the early years, every time we built a Th-700R4 and installed it
into a custom application it would respond differently than the last
one, never producing predictable, dependable shift timing and feel
results. This was a very frustrating time in our business because
we would build these transmissions the same each time. Same exact
parts, same machining and same assembly procedures, but the transmissions
produced different shift timing and feel results. We soon found the
internal hydraulic pump control system and the external TV (throttle
valve) system were the cause. We started machining our internal pumps
to very strict tolerance, this helped. We started blue printing the
control valve assembly in the valve body, and it got a little better.
Finally, we introduced our TV MADE EZ system after applying for a
U.S. patent, these transmissions suddenly became predictable! This
system corrects the geometry on after market Holley, Carter, Demon
and Edelbrock carburetors. Now our modifications and associated procedures
produce a standard predictable response from these transmissions,
time after time. Our TV MADE EZ system allows the customer to "dial
in" the shift timing and feel of his or her transmission once
|While doing these
custom installations; we, like anyone doing custom installs, had to
fabricate many custom parts and pieces to get these units installed
and working correctly. As we found good solutions to these installations
and set up problems, we became motivated to start manufacturing special
products to help others with their custom installations. Bow Tie Overdrives
now makes an extensive line of products:
* Our U.S. patented "TV MADE EZ" system.
* Our extensive line of direct, no drilling or welding custom tubular
crossmembers for most popular cars and pick ups.
* Our new simple to install, "LINES MADE EZ", stainless
steel cooling lines that are very simple to install.
* Throttle cable kits.
* Shifter kits for the stock Powerglide shifter 1958 to 1964 Corvettes
with built in park / neutral safety switch.
* Pressure gauges for testing and set up.
* Wiring harnesses and related items.
We have found suppliers that make certain items we feel solve difficult
issues and now stock their products as well. There are always unique situations during any one of our installations. If you have any questions our tech service is available to help you solve these individual challenges