New Reproduction Transmission Throttle Valve Cable. Fits all 86-87 Turbo Regal and 89 Turbo Trans Am with the 200-4R transmission. This is an exact fit cable. Replaces GM part # 25532115. No more universal fit cables that do not fit or cheap after market units. Our Cable was tested by two well known transmission builders.
Everyone knows how important a properly working TV is to the performance and longevity of the 200-4R in a Turbo Buick. The factory has a hard plastic outer jacket that can become brittle and break. This has been upgraded. Our unit comes with a hard rubber jacket for flexability.This unit also comes with the rubber seal attached and ready to install. We will have a separate listing for TV cable Grommets shortly
The cable is larger than factory to prevent stretching. You can see from the pictures the OEM unit cable is .09 MM. Our new unit is 1.3 MM. it will not effect the Detent spring.
Lifetime Warranty!
If needed please check out our stainless steel detent and factory replacement mounting brackets and throttle body levers for these cars.
https://gbodyparts.com/product_info.php?products_id=3377
https://gbodyparts.com/advanced_search_result.php?keywords=stainless+detent
| Theory of Operation |
| The T.V. cable used on the 200-4R transmission controls line pressure, shift point, shift feel, part throttle downshifts and detent downshifts. The T.V. cable operates the throttle valve lever and bracket assembly inside the valve body.
The Throttle Valve Lever and Bracket Assembly serve two basic functions:
- To transfer the throttle lever movement to the T.V. plunger in the control valve assembly. This causes T.V. pressure and line pressure to increase according to engine throttle openings and controls part throttle and detent downshifts.
- To prevent the transmission from operating at low (idle) pressures, if the T.V. cable should break or become disconnected.
If the cable is not connected or broken, the T.V. lifter rod will not move from its normal position which holds the T.V. exhaust check ball off its seat. The T.V. lifter rod will drop down to allow the T.V. exhaust ball to seat only if the cable is broken, disconnected or out of adjustment. With the transmission pan removed, pull down on the T.V. exhaust valve lifter rod and the spring should return to rod to its normal up position. If the throttle valve lever and bracket assembly or lifter rod binds or sticks so that the T.V. lifter rod cannot lift the exhaust ball off its seat, high line pressures and delayed upshifts will result (Note that this is what we will try to accomplish, tighter shifts). The T.V. lifter rod must not be bent or it will not function correctly.
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| Adjustment Procedure |
| On the driver's side of the intake plenum is a bracket holding 2 or 3 cables:the Accelerator cable, T.V. cable, and if you have Cruise, the cruise controlcable. The T.V. cable has "ridges" on the cable housing and routes behind and down the engine to the passenger side of the transmission. Note the metal Brass colored, "D-shaped" tab in the center of the bracket, this is the readjustment tab. Take note of the T.V. cable position (number of exposed ridges).
With the engine off, depress and hold in the readjustment tab. Pull the cable housing towards the firewall 3 or 4 clicks and release the readjustment tab. While you watch the cable housing travel, have someone push the accelerator pedal to WOT. (Yes you can rotate the throttle lever by hand but by using someone's foot you are duplicating the actual throttle movement achieved while driving the car.) The cable housing will "ratchet" forward towards the radiator. This is the "GM recommended" setting. If your T.V. cable was out of adjustment, the number of exposed ridges will have changed.
As a benefit to those desiring firmer shifts, you can attain higher shift points by moving the T.V. cable back towards the firewall one more "click". Try this and see if the cable housing will not ratchet back out when you press the accelerator to WOT. A worn out cable housing or adjustment mechanism may only let you go to the "GM recommended" setting. You should also know that by delaying shifts on a transmission whose clutches are already "shot", this will accelerate the deterioration of the transmission.
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