Proper installation of the throttle
valve cable on after-market carburetors or fuel injections. This
information applies to all 700R4, 4L60 and 200-4R transmissions.
Throttle valve cable adjustment instructions, numbers 4, 5 and
is a guide ONLY Hartrods is not held responsible for any miss or
un proper adjustments
#1. The button that the
cable hooks to at the carburetor or throttle body must have a 1
and 3/32-inch radius from the center of the throttle shaft to
the center of the button the cable hooks to.
#2. Looking at the throttle shaft lever from the left side at
idle position, 33% of the throttle lever total travel must be to
the rear of the throttle shaft centerline. And at wide-open
throttle, 67% to the front of the throttle shaft centerline.
This will be about ½-inch to the rear and 1 inch to the front of
the throttle shaft centerline.
#3. The throttle valve cable must be hooked up in this manner so
the pressure will rise faster off idle and slow down at heavy
throttle. If the pressure cable is pulled in a more even manner
the pressure will be too low at light throttle. Failure to
hook-up the throttle cable in this way will burn the three-four
clutch pack up fast.
#4. The throttle valve cable controls transmission pressure.
Adjusting this cable is the most important step when installing
a 700R4, 4L60 or 200-4R transmission.
#5. The final step is to adjust the throttle valve cable. The
cable must be adjusted so it is pulled fully out at wide-open
throttle. To make sure disconnect the cable, hold the throttle
wide open with your left hand, pull the cable fully out with
your right hand and see if the cable end lines up with the
button on the throttle lever.
#6. Do not attempt to adjust the shift timing with the
throttle valve cable. The shift timing is controlled by the
governor springs. For higher shift points at wide-open throttle,
install lighter springs. For lower shift points at wide-open
throttle, install stronger springs.
#7. You can get a cable button off of a junk GM vehicle and weld
it to your throttle valve lever. We sell a cable correction kit
for Holly and Edelbrock carburetors.
#8. Sometimes on a newly rebuilt 700R4 or 200-4R transmission,
it may not make the 3-4 shift when first installed. A stuck
valve, trash in the fluid or an air pocket, usually causes this.
Raise the rear wheels off the ground, place the transmission in
overdrive position. Run the speedometer as high as 100 miles per
hour, pop the throttle on and off and see if you can force a 3-4
shift. Once it makes the first 3-4 shift, work the shift lever
back and forth between drive and overdrive until the 3-4 shift
#9. If you have a Holley or Edelbrock
carburetor, you must install an adapter on the carburetor
linkage for the transmission to work correctly. #29 at