Reset the trip mileage minder on my 1993 240 the other day and now it no longer works, which in turn prevents the odometer from working.

Is there a fix for this?
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1993 240, 1992 240GL, 1985 240DL Wagon, 1983 240DL

I've fixed 2 different 240's w non functioning odometers. In both cases it was the smaller gear. Easy to repalce the gear, I bought both off ebay for cheaper than IPD or FCP. Dave Barton website has a great picture and written tutorial for gear swap. Good luck!
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1990 240DL red, 2004 V70 2.5t

My experience agrees with yours. I've never seen any reason to replace the larger gear, and I've done this job a few times.

Now that I've had a few years and several replacements worth of experience with them, I can say the machined Delrin gear you can find on ebay works as well as the molded ones. Save your IPD money for sway bars.

Be sure to find ALL of the broken teeth, and be gentle with the motor, touching up the motor's 3 solder pads before reassembling.

After replacement I can guarantee you will be able to use your trip reset freely again without fear.







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Art Benstein near Baltimore

They say you can do anything in international waters.
That's why I filled my hot tub with international water.

Thanks Art! Your third pic of all the broken gears is priceless! Volvo never did figure out how to use metal gears for the odo.


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My back feels better when I sit in a Volvo seat

Thank you, Klaus. I figure people are getting tired of me posting this stuff all the time and am truly surprised when these old issues get new threads. Guess the search function is only as good as the labels we include, spelling, and terminology. I'm as guilty as anyone.

As for Volvo, I bet there's someone at VDO who can explain (or remember someone explaining) what turned those particular gears to jelly, when there are a number of plastic gears in use elsewhere that are still as good as the day they were assembled into this gauge. Shame on VDO for not making free replacements and forcing entrepreneurs to copy and supply them. I guess a manufacturer needs a lawsuit to move them to do right.
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Art Benstein near Baltimore

I have several of each awaiting time and inclination, as the Tower of Pisa said to Big Ben, "If you've got the time, I've got the inclination." - GD III

thanks for those pix

my 87 OD stopped a few hundred miles ago... have a folder filled with How To Do it from BrkBrd links.

Don't stop posting leads

tx for the memory reboot

Yes, good to have an odometer. We took an 1800 mile trip in our 79 last month. No problem there, but when we returned we found our 89 wagon's fuel gauge sitting on the empty peg, after a week left outside in the driveway. But when we took it for a fillup (the trip odometer only had a 70 miles on it) it only took $10 worth.

I put off looking at it because I figured I'd be messing in the tank once I proved the gauge worked (by grounding the gray wire). So last Saturday -- a gorgeous non-rainy day -- the car's cargo was unloaded and the plywood pulled up so I could see what died in the ~7-year-old aftermarket sender. Half expected the float ball to be full of gas like I found with another. But...

Something chewed cleanly through the sender cable two inches from the top of the sender. First thought was a mouse, but I'm wondering if a groundhog could get up there on top of the tank.

A guy sorta local to us makes gears from Delrin. He pops them into an envelope with some clever packaging, and saves you on shipping. I'm impressed, although I can't say anything against the molded gears.

www.ebay.com/itm/261492976705

I have some old notes online about replacing them here -> references Need to update the notes with later experiences and bring the presentation style into the 21st century.
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Art Benstein near Baltimore

A truly happy person is one who can enjoy the scenery on a detour.

hi sages- always enjoy reading repeated entries here on the bb about speedometer anomalies since i usually learn something new. have concluded due to the frequency of failure that the older cable and gear speedometers are better/more durable and long lasting contrasted to these electronic speedos. older american cars, typically had that type. after about 10 years you would get an increasingly loud whirring noise and the needle would jump all over the place from hoboken nj to stinking creek md. used to think it was a worn or busted cable inside the sheath. never was. always squirted light white lithium grease from one of those aerosal cans into the cable which you would unclip from he speed back. easy and it worked for another 10 years. after i bought my 92 245 early in 2011, noticed the odometer didnt work. i always preferred to check my mpg regularly , being a frugal person, but also because uncle moe told me to do it back in 64 b/c it is a good tipoff on when you need to do an engine or systems check. anyway inquired about it on the bb when i found out it was not a cable type which led me to take apart the cluster where i found busted teeth on the gears. replaced the two with ones from odometergears.com in va. found out it was very important to shake out and airblow out the assembly to avoid teeth fragments from rejamming the new gears. havent seen any reports of electronic sender crapouts on the diff unit which signals speed to the cluster. is that a hellacious hassle to replace? thanks tons oldduke

Up here in stinking creek at flood stage it would be the special flexible silicone-insulated cable leading from the differential's magnetic pickup to the car body to be suspect, and not the sender itself, as replacement of anything you have not replaced before is most likely a hellacious task and best left to shysters who learned the trade in the free love era.

So, things haven't changed much. Though the 90-day shot of lube won't apply, it is still the cable's fault:




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Art Benstein near Baltimore

The roundest knight at King Arthur's round table was Sir Cumference.

hi art ben- wow didnt know stinking creek ever reached flood stage. are you kidding. thats a true and very good rule on hellaciousness. so arty youre telling me replacing, snaking and attaching this specialized cable is a tough job or just time consuming. bet you have to solder the wire at the speedo or is it a plug in. now i lived through that era you refer to . in fact i was wounded in action. learned a lot of my knowledge on cars then, but most of it is obsolete now. heres something that only you and i have done from the board. my a108 maytag was thumping and shaking like a v8 on 5 cylinders. feared well this is it the transmission is bad. took the front panel off and then tipped it over to look at the sliding motor. noticed a 1 inch chunk was missing from the inside of the drive belt. slipped a new one on- end of problem . guess what a shyster would have charged me for that job. be careful you might get sticker shock. highest regards oldduke

Is there only 1 gear that fits my 1993 240? Or do I need to take everything apart and check before ordering. Dave Barton mentions on his site that most 1993 are 25 tooth, although a few are 26 tooth

Thanks to all who responded to my thread.
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1993 240, 1992 240GL, 1985 240DL Wagon, 1983 240DL

Read about it in the archives; then pull it apart and inspect.
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240 drivers / parts cars - JH, Ohio

IPD sells a great kit that has a replacement cog and a DVD on doing the replacement. Pretty simple it seems (I cant get mine to stay fixed for longer than a mile however).

One, of course, is a broken tooth on one of the gears. You can get a set of both gears (the little one and the big one) from IPD -- had that on my wife's speedometer head.

The other issue is a failed solder joint on the motor, creating on my own car's speedometer head a frustrating intermittent failure until I realized the nature of the problem (but no reason why it couldn't be a continuing failure in your case). A simple fix with a soldering iron and little more solder, to reflow the joint.

I think Art Bernstein has posted photos of the repair to both -- contact him.

Did you get the broken teeth out of the bigger gear that broke of the smaller gear?

It might be the small 25 tooth gear on the odometer motor attached to the side of the speedometer.

The old gears eventually fail.
Dan