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  1. 9

    C68 HVAC Controller and Programmer Repaired -- batee.com

    Many of us have cursed the C4's C68 climate control system's functionality. For anyone at their wits end and considering having the controller and programmer rebuilt, I whole heartedly recommend batee.com/Bryan Thompson. After many years of declining functionality, he rebuilt both units at a...
  2. 9

    Question: 1990 ZF 6-speed intermittent balk upshifting to third gear

    Problem solved. Draining the previously recommended Castrol 10-60 and refilling the transmission with Amsoil Synthetic Manual Synchromesh Transmission Fluid immediately and totally cured the problem. I have since tried to induce the previous fault while shifting and been unable to do so. I have...
  3. 9

    Question: 1990 Windshield washer hose retainers/sleeves for wiper arm -- souce?

    Would anyone know a source for the approximately 7" long plastic retainers (or sleeves) that hold the windshield washer hose to the wiper arm? Mine are dried out and split, and I have been unable to find a replacement source. Thank you very much.
  4. 9

    Help! Wanted: C4 Wiper arm washer hose retainers

    Hello, I've been unable to locate any of the black plastic approximately seven inch-long retainers/sleeves that clip over the windshield wiper arm and hold the windshield washer hose in place. My car is a '90 convertible and the original retainers are splitting; one has fallen off and the other...
  5. 9

    Question: 1990 ZF 6-speed intermittent balk upshifting to third gear

    Thank you for your sharing your insights! Following up on my car's skip shift feature, the Computer Aided Gear Selection bung (electronically-activated skip shift mechanical component within the transmission) was removed, disabling the skip shift feature. An aftermarket electronic disabling part...
  6. 9

    Question: 1990 ZF 6-speed intermittent balk upshifting to third gear

    I appreciate your reply; thank you! The clutch and related hydraulics have been reconfirmed as functioning as designed/within spec. By "balking," what I mean is that in performing the 2-3 upshift, during the movement from the neutral detent toward third gear, the shifter feels as though it runs...
  7. 9

    Question: 1990 ZF 6-speed intermittent balk upshifting to third gear

    My '90 6-speed balks (no grinding) occasionally when upshifting from second gear to third gear. It works best if just relying on the spring loaded shifter mechanism, and pushing straight forward out of second gear (slowly enough to avoid going into first gear). Downshifting from fourth gear into...
  8. 9

    '90 Climate control & horn intermittent -- Please help.

    Thank you for replying. Regretfully, I have virtually no Corvette product knowledge and do not have a factory service manual, nor am I familiar with either DTC H History codes or the paperclip trick for codes. The dealer said there were no codes and I pretty much have to go with that, though I...
  9. 9

    '90 Climate control & horn intermittent -- Please help.

    1990 Convert w/ Factory Hard Top, Built 6/1/1990 (Day 152), C68 A/C, 18,614 Original Miles Intermittent climate control and horn. No codes or warning lights. About 75% of the time when starting the car, the climate control screen goes blank, the blower runs at a high speed blowing ambient air...
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