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Old 08-24-2017, 07:20 PM   #1
PDX245T
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Default 83 245 speedo cable replacement question

I replaced the cable, but I can't seem to connect at the transmission. When I turn the car over, the transmission connector does not spin. It has worked it's way out somehow and I can't figure out how to push it back in place to connect everything up.

Ideas or answers?
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Old 08-24-2017, 07:49 PM   #2
apachechef
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I don't think the speedometer cable moves when the car is starting
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Old 08-25-2017, 09:30 PM   #3
bobxyz
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Here's what the transmission side speedo pickup assembly looks like:


The cable screws onto the threaded part. There should be a clamp that holds this assy into the tranny. If you don't have a hold-down clamp, the assy may not be fully seated.

Assuming no clamp, or a really loose clamp, you want to first remove the assy. To do this, leave the cable attached, and pull/pry it out of the tranny carefully. You're fighting the rubber o-ring. Once the assy is removed, undo the cable and check the plastic gear for damage. Re-install the assy, without the cable, while spinning the gear shaft by hand. You want to make sure the gear engages cleanly versus mashing the plastic to bits. Make sure it's fully seated. At this point, you could just reinstall the cable&clamp and try it, or you could jack up a wheel and spin it by hand to see if the shaft spins.
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Old 06-13-2018, 02:46 PM   #4
PDX245T
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How much tranny fluid will I loose when pulling his gear out? Should I jack up the back to minimize lose? I started to pull it out and tranny fluid started to pour, so I pushed it back in.
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Old 06-13-2018, 02:51 PM   #5
hiperfauto
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Which transmission? Can you post a pic?
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Old 06-13-2018, 03:34 PM   #6
PDX245T
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M46
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Old 06-13-2018, 03:55 PM   #7
hiperfauto
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You'll lose about ½ quart when you pull the speedometer gear.

If the shaft of the speedometer gear isn't turning when the driveshaft is, the plastic gear is probably stripped. Either that or the output flange is loose.
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Old 06-14-2018, 04:12 AM   #8
John242Ti
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Quote:
Originally Posted by PDX245T View Post
I replaced the cable, but I can't seem to connect at the transmission. When I turn the car over, the transmission connector does not spin. It has worked it's way out somehow and I can't figure out how to push it back in place to connect everything up.

Ideas or answers?
Are you turning it over by spinning the driveshaft, or by using the starter with the car in neutral? If the latter, it shouldn't turn. If the former, then, yes, you should see the speedometer gear's shaft turn.

Get the car in the air, make sure that it's firmly in place, then put the tranny in neutral with the parking brake released. Crawl underneath. Spin the driveshaft while watching the gear's shaft. You should see it move. If it doesn't move, and the housing is seated against the overdrive unit's speedo drive port, then you need a new gear. Proper one for your car is red, if the car was originally a M46 car. If not, then it'll be a black gear, since that's what's used for the 3.91 rear axles (as well as the 3.31 rear axles, but with a different worm gear inside).
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