Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
Re: SPEEDO CABLE QUESTIONS
Every speedo cable I've ever seen has been swaged square for the last inch or so on the transmission end, and the gear has a square hole in it. The speedo end usually has a square sleeve crimped on to drive the instrument.
They could well have come up with something different in later years before electronic speedos, but that's the way it's been since the crust cooled - at least from my '55 Chevy to my '78 CJ. Now that I think about it, my MGs might have had something different, like a flat tip instead of square, but the idea was the same.
Or are you talking about the drive gear on the transfer case output shaft? Usually that's a press fit, but sometimes the shaft is threaded and a nut secures the gear.
The plastic speedo gear is roughly mushroom-shaped, with the gear teeth on the cap of the mushroom, and the stem, with the square drive hole, fitting inside an adapter. The adapter holds the gear in position in the transfer case, and is threaded for the nut on the end of the cable sheath.