Jetuplusllc Transmission Detent Kickdown Cable for 700R4/4L60/2004R (39.5" conduit, direct-fit)

Replacement transmission detent/kickdown cable engineered to restore throttle-to-transmission linkage on GM 700R4, 4L60 and 2004R manuals for the specified years.

This direct-fit kickdown cable from Jetuplusllc (part number K77978) is a new aftermarket replacement built to match the cable routing, length and adjustment range used on many late-1970s through early-1990s General Motors automatic transmissions. It’s made for mechanical (non-electronic) applications and includes the proper outer conduit and inner wire lengths so installers can return the throttle-to-transmission connection to factory-like operation without complex modification.

Which vehicles and transmissions is this cable compatible with?

This cable is intended for several GM transmissions across specific year ranges. It will not work where an electronic transmission control (4L60E) is present. Verify your transmission model before purchase.

• Fits 700R4 from 1982 through 1993
• Fits 4L60 from 1987 through 1993
• Fits 2004R (200R4) from 1981 through 1990
• Does NOT fit 4L60E electronic transmissions

What are the cable dimensions and adjustment limits?

The Jetuplusllc cable is specified to give installers the physical reach and fine-tuning needed for correct kickdown/holding settings. Exact measurements help confirm fitment before installation.

• Outer conduit length: 39.5 inches
• Inner wire length: 45 inches
• Additional adjustable travel: 1.5 inches for final tuning
• Designed to match original routing and attachment points for straightforward replacement

How does installation and interchangeability look for this part?

This product is supplied as a direct replacement and cross-references common aftermarket and OEM numbers to simplify sourcing. It includes the same basic end fittings and travel range used by the original assemblies.

• Manufacturer part number: K77978
• Interchange numbers: T54450C, K77978, M-T54450C, GM999C
• Fitment type: direct replacement — designed for bolt-on installation where original cable was used
• New condition part meant to replace worn, stretched or damaged cables

What should I check before buying this cable?

Confirming a few items will prevent a mismatched purchase. Visual inspection of the existing cable and checking the transmission model are the quickest ways to be sure this is the correct replacement.

• Verify your transmission model is 700R4, 4L60 (non‑E) or 2004R within the listed years
• Confirm your existing cable routing and end fittings match the replacement
• Measure needed lengths if your original cable was modified or shortened
• Do not use on 4L60E-equipped vehicles (electronic control variation)

This Jetuplusllc K77978 kickdown cable is for mechanics, restoration specialists and DIY enthusiasts working on classic GM automatic transmissions who need a reliable mechanical linkage replacement. It’s suitable for vehicle restorations, transmission rebuilds, or replacing failed throttle-to-transmission cables in period-correct GM models. If you run a 700R4, 4L60 (non-electronic) or 2004R transmission within the covered years and require a direct replacement with clear specifications, this cable provides the measured lengths and adjustment range to reinstall a functional detent/kickdown connection.