Phill S Posted December 4, 2022 Share Posted December 4, 2022 Changing the speedometer in my truck with a used unit and wondering if there's a way to change the odometer to match what's coming out? It's a stock 1997 unit Any help/ideas gratefully received! Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 5, 2022 Share Posted December 5, 2022 which is the highest value? Quote Link to comment Share on other sites More sharing options...
Phill S Posted December 5, 2022 Author Share Posted December 5, 2022 The one that's going in. Would need to knock a fair few miles off of it to match up.... Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 6, 2022 Share Posted December 6, 2022 You can spin it over by attaching a drill to the cable. It's not ideal and you need to be careful. I would (and have) just fit the replacement and log the change of miles in the vehicle hisotry file Quote Link to comment Share on other sites More sharing options...
teabag Posted December 7, 2022 Share Posted December 7, 2022 On 12/6/2022 at 8:10 AM, Nonimouse said: You can spin it over by attaching a drill to the cable. It's not ideal and you need to be careful. I would (and have) just fit the replacement and log the change of miles in the vehicle hisotry file So how is that going to work? A 1997 disco doesn’t have a cable. Quote Link to comment Share on other sites More sharing options...
teabag Posted December 7, 2022 Share Posted December 7, 2022 On 12/4/2022 at 11:13 AM, Phill S said: Changing the speedometer in my truck with a used unit and wondering if there's a way to change the odometer to match what's coming out? It's a stock 1997 unit Any help/ideas gratefully received! A specialist in speedo repair company may able, but its electronic and receives electronic pulses from a transducer screwed to the vehicles transfer box. Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 7, 2022 Share Posted December 7, 2022 2 hours ago, teabag said: So how is that going to work? A 1997 disco doesn’t have a cable. Those that have a transducer still have a drive to the transducer. No transducer, still have a cable gearbox. Duh! Quote Link to comment Share on other sites More sharing options...
teabag Posted December 7, 2022 Share Posted December 7, 2022 3 hours ago, Nonimouse said: Those that have a transducer still have a drive to the transducer. No transducer, still have a cable gearbox. Duh! That ended with the mid 1995 with the intro of new 300 series. The OP has a 1997 disco, I’ve owned mine for the last 25 years… so as already stated electrical pulses from the transducer. Quote Link to comment Share on other sites More sharing options...
Peaklander Posted December 8, 2022 Share Posted December 8, 2022 10 hours ago, teabag said: electrical pulses from the transducer. but 14 hours ago, Nonimouse said: Those that have a transducer still have a drive to the transducer output and input Maybe you can 'drill spin' the input with a suitable adapter Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted December 8, 2022 Share Posted December 8, 2022 There's a short cable from box to transducer. Quote Link to comment Share on other sites More sharing options...
Phill S Posted December 8, 2022 Author Share Posted December 8, 2022 Thanks guys. Don't think the drill approach is going to work. Simple sum, if I set it up on the bench at 100mph, it'll take 10 hours to increase by 1,000 miles, 100 hours to do 10,000 etc. I should come clean at this point and say that I'm looking at putting the Disco 1 instrument cluster into my 1987 110. Ex-army truck, only done 5,000 ish miles, the Disco speedo I have has done 61k ish miles. You see the magnitude of the task. I've rebuild the Disco transfer box and it certainly has the transducer drive to the speedo by electrical wiring. With the speedo out of the cluster you can see all the gears and sprags that operate the odometer and I'd been thinking there's maybe a simple way to flip the individual registers over. I'll put up some pics this evening... 1 Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 8, 2022 Share Posted December 8, 2022 9 hours ago, Bowie69 said: There's a short cable from box to transducer. Thank you. 1 1 Quote Link to comment Share on other sites More sharing options...
Phill S Posted December 9, 2022 Author Share Posted December 9, 2022 Just to try to shed a little more light on what I (think I) want to do. Still working out the practicalities, so every possibility it might fall in a heap and I revert to the original 110 config. Probably more detail follows than anybody wants, but stop reading if you get bored/have short attention span. The story starts with a pre-Putin war plan to replace my 1987 stinky 2.5 NA diesel engine with a 3.9 V8. So I bought an insurance write off 1997 Disco 1. As a part of my refit I want to replace the 24v wiring with 12v. So I carefully removed the Disco wiring loom along with a mass of other useful bits. Here's me offering up the wiring in the dash area: Yeah - that looks like it'll work. Still working out the cable runs, so plenty of opportunity for the plan to get scuppered. But I bet somebody's done it before... Now the original Disco instrument cluster will sit nicely in the centre section, pic just to confirm the unit I'm working with for anybody that knows about such things: And here's the guts of the speedo unit: It is possible to push the white wheel around (1/10th of a mile spool) and have the miles increase, although there's a rubbery feeling of resistance which would most likely result in wear of the mechanism if I pushed it around for any amount of time. Having got to that point I thought it worthwhile asking here if there's an easy way to push the higher register spools around, but I'm guessing it may be designed to be tamper-proof... 1 Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted December 9, 2022 Share Posted December 9, 2022 1 hour ago, Phill S said: Just to try to shed a little more light on what I (think I) want to do. Still working out the practicalities, so every possibility it might fall in a heap and I revert to the original 110 config. Probably more detail follows than anybody wants, but stop reading if you get bored/have short attention span. The story starts with a pre-Putin war plan to replace my 1987 stinky 2.5 NA diesel engine with a 3.9 V8. So I bought an insurance write off 1997 Disco 1. As a part of my refit I want to replace the 24v wiring with 12v. So I carefully removed the Disco wiring loom along with a mass of other useful bits. Here's me offering up the wiring in the dash area: Yeah - that looks like it'll work. Still working out the cable runs, so plenty of opportunity for the plan to get scuppered. But I bet somebody's done it before... Now the original Disco instrument cluster will sit nicely in the centre section, pic just to confirm the unit I'm working with for anybody that knows about such things: And here's the guts of the speedo unit: It is possible to push the white wheel around (1/10th of a mile spool) and have the miles increase, although there's a rubbery feeling of resistance which would most likely result in wear of the mechanism if I pushed it around for any amount of time. Having got to that point I thought it worthwhile asking here if there's an easy way to push the higher register spools around, but I'm guessing it may be designed to be tamper-proof... I have 2 of them one at 112000 and the other at 182000 if they are closer to mileage your wanting to show I could post the one you want to you regards Stephen 1 Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 9, 2022 Share Posted December 9, 2022 I fitted an RRC hard dash guage set to my first Hybrid, in exactly this place. It worked well. I think this will look really good - it's a nice set up Quote Link to comment Share on other sites More sharing options...
Phill S Posted December 9, 2022 Author Share Posted December 9, 2022 5 hours ago, Stellaghost said: I have 2 of them one at 112000 and the other at 182000 if they are closer to mileage your wanting to show I could post the one you want to you regards Stephen Sadly not - my 110 has only done 5k miles. Or was it Km? Not many anyway. But thanks for the offer. If I have to go with fitting the Disco one I have that reads 61k, that would probably be my best compromise 5 hours ago, Nonimouse said: I fitted an RRC hard dash guage set to my first Hybrid, in exactly this place. It worked well. I think this will look really good - it's a nice set up Interesting. A Hybrid is a 110/Defender or similar on a RRC chassis? Pardon my ignorance... Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted December 12, 2022 Share Posted December 12, 2022 Yes. A hybrid is a Series or Defender body on an RRC chassis Quote Link to comment Share on other sites More sharing options...
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