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Old 02-14-2019, 10:06 PM
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Probesport Probesport is offline
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Speedo bouncing

Greetings all. I have an issue that I've not come across in a car before. My Waggy speedometer 'bounces' above 80mph but returns to accurate below. Is this a gauge, speedo drive, or cable issue?

The cluster, cable, transmission are all stock.

TIA

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Old 02-14-2019, 10:13 PM
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Cecil14 Cecil14 is offline
 
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I've seen bouncing needles from loose and worn cables. Easiest thing to check is make sure the cable is tight on both ends. If that doesn't help, you might pull it off the speedo and see if you can get some cable lube down into it. You could also pull it off both ends and make sure it spins freely in the housing, if it's binding up, that could cause bounce.


aa
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Old 02-15-2019, 05:30 AM
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Probesport Probesport is offline
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Thanks for the reply. I have verified that it's tight on each end, and was able to get a few drops of speedo cable lube down in there but no change.

I've been leaning gauge but it doesn't make sense (to me) that it's fine until 80.
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Jeep toy: 1988 Jeep Grand Wagoneer
Megasquirt EFI
: Heated Seats : Blower fix : Driving light brackets : Shorty headers : Coil Packs : Electric Fans
Prior Jeeps: 1997 Jeep Wrangler TJ, 1994 Jeep Grand Cherokee Limited
Other toys: 1930 Model A (Hotrod), 1997 Ford Probe Turbo, 2000 Jaguar XJ8, 2005 VW Touareg
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Old 02-15-2019, 07:23 PM
61Hawk 61Hawk is offline
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I'd be more worried about driving over 80 mph than the bouncing speedometer needle. 80 mph, what is that about 4000 rpm?
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Old 02-15-2019, 08:07 PM
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Crankyolman Crankyolman is offline
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Mine does that at 40MPH for around 2 or 3 weeks in November then doesn't do it any more until the next November. I have no idea why. I'd like to know a solution if you find one.
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  #6  
Old 02-15-2019, 09:45 PM
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ZackN920 ZackN920 is offline
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I've seen that in speedo's at lower speeds. I think my old truck sometimes does it a little bit to an extant. I have read about it being an issue with weights, gears and springs set up inside the speedometer itself.

My stepdad had a ranger from the early 90's that did this terribly at low speed. Once at highway speed it smoothed out.

This reminds me. Gotta do something about my cable in the GW. It has gotten Noisy! First real cold day of the winter and the thing got loud. It sounds like bits of gravel are inside of the cable...
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Old 02-18-2019, 10:44 AM
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Probesport Probesport is offline
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Thanks for the responses, yes 80 is up there in RPM's with the 727 but I do plan on some more gears in the future.

I ordered another speedo off of eBay, i'll see if its just the gauge in a few days I guess.
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Jeep toy: 1988 Jeep Grand Wagoneer
Megasquirt EFI
: Heated Seats : Blower fix : Driving light brackets : Shorty headers : Coil Packs : Electric Fans
Prior Jeeps: 1997 Jeep Wrangler TJ, 1994 Jeep Grand Cherokee Limited
Other toys: 1930 Model A (Hotrod), 1997 Ford Probe Turbo, 2000 Jaguar XJ8, 2005 VW Touareg
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Old 02-18-2019, 11:14 AM
joe joe is offline
 
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Step one: quit pouring oil into the cable housing! You're just gumming things up more and risk trashing the speedo with the oil getting flung off the cable and into the speedo. More than likely after 30 years it just needs to be removed, cleaned and lubed.
The cable is essentially a very tightly wound spring. The bouncing happens when there is rust, old lube etc binding the coil segments, not the cable rubbing on the housing.
Pull the cable and soak it in gasoline, solvent, whatever ya got. Work the cable to loosen any rust, crud. Flush and hang to dry thoroughly. Some folks lube with powdered graphite cable lube which works till the next guy pours oil into the cable housing. I prefer using a light machine oil like 3-in-1, sewing machine oil. What ever you use massage/work it into the coil segments, don't just coat the outside of the cable.
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Old 02-18-2019, 12:00 PM
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Probesport Probesport is offline
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Yes, you are correct and some good points but I wouldn't use 3-in-one oil. I have pulled the center out and only use speedo lubricant - I guess i should have clarified more i know most people aren't following my builds. I added a few drops more after I rebuilt my speedo cable.

I wouldn't recommend using anything other than a speedo cable lube, AGS makes one that I've used in cars going back to the 30s without any issue. Also, the center wound cable should be cleaned in an ultrasonic or replaced - its the only way to really get everything out of the windings.

The cable housing itself should be totally cleaned and allowed to dry. Using a cable oil wipe the coil, let sit and then wipe off excess.

My cable is like new, and the ends were cleaned using an electrolytic rust removal and each end then polished. I am really left at just the speedo itself or the speed sensor.
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Jeep toy: 1988 Jeep Grand Wagoneer
Megasquirt EFI
: Heated Seats : Blower fix : Driving light brackets : Shorty headers : Coil Packs : Electric Fans
Prior Jeeps: 1997 Jeep Wrangler TJ, 1994 Jeep Grand Cherokee Limited
Other toys: 1930 Model A (Hotrod), 1997 Ford Probe Turbo, 2000 Jaguar XJ8, 2005 VW Touareg
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Old 02-24-2019, 12:40 PM
tbwingyJ10 tbwingyJ10 is offline
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Clear plastic over the gauges

Hello, not wanting to hijack your thread, but can't find anything on this topic. I removed my cluster partly because the round, plastic, clear windows had all become disconnected. Any tips on a good glue/binder to hold them back in to place? Thank you
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  #11  
Old 02-24-2019, 06:53 PM
joe joe is offline
 
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Quote:
Originally Posted by tbwingyJ10
Hello, not wanting to hijack your thread, but can't find anything on this topic. I removed my cluster partly because the round, plastic, clear windows had all become disconnected. Any tips on a good glue/binder to hold them back in to place? Thank you
I didn't remove the cluster. Just used a kids suction cup dart rom a play gun. Stuck it on the clean lens, pulled it in place and used one drop of regular plastic model building glue at 12, 3, 6 and 9 o'clock.
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Old 02-25-2019, 10:04 AM
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rang-a-stang rang-a-stang is offline
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Quote:
Originally Posted by tbwingyJ10
Hello, not wanting to hijack your thread, but can't find anything on this topic. I removed my cluster partly because the round, plastic, clear windows had all become disconnected. Any tips on a good glue/binder to hold them back in to place? Thank you
I used this stuff and it seems to hold pretty well.
http://www.loctiteproducts.com/p/sg_...ing-System.htm
take your time because if you put too much it will cloud the lens. Also, make sure you are bonding plastic to plastic. The previous owner of mine had tried glueing it one time before and I had to send the old adhesive off so I could get plastic to plastic contact.
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  #13  
Old 02-25-2019, 01:47 PM
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Probesport Probesport is offline
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Update: It was the gauge. I swapped in an eBay cluster and no more bounce at any speed.



For lens attachment, E6000, silicone glue, or even hot glue will do. Stay away from anything that can melt plastic or contains cyanoacrylate or acetone (or smells similar) as that will permanently cloud anything it touches.
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Ken S.
Jeep toy: 1988 Jeep Grand Wagoneer
Megasquirt EFI
: Heated Seats : Blower fix : Driving light brackets : Shorty headers : Coil Packs : Electric Fans
Prior Jeeps: 1997 Jeep Wrangler TJ, 1994 Jeep Grand Cherokee Limited
Other toys: 1930 Model A (Hotrod), 1997 Ford Probe Turbo, 2000 Jaguar XJ8, 2005 VW Touareg
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  #14  
Old 02-27-2019, 01:35 AM
axton36 axton36 is offline
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Glad that you figured it out. Had the same problem and it was a cable issue.
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