As it says, the tgs one sticks at 40mph and wont go above it, you then have to give the dash pod a good hard tap for it to go back to zero even when stationary or pressing the reset on the trip meter does the same job!
Is it possible to lubricate it?, I have a bnib speedo I can fit but as its done intergalactic mileage I want to try and retain the original speedo for posterity, and see if I can get up to 250000 miles before I sell it on.
Sticking Speedo
You haven't got much to loose - although it would be possible to set the replacement speedo to the correct mileage (I think you have to push the digits backwards - when its a ratchet mechanism.
Access may well be by undoing the screws visible in the dial and pulling it out of its housing. The problem is that unless you have the right screwdriver you'll bruise the screws which will show. Its probably then a case of a clean and very gentle lubrication with single drops of machine oil - no sprays!
The thing works by magnetic attraction of the disc attached to the pointer - so the cable revolves a magnet - which attracts the weakly magnetic disc attached to the pointer. The disc may well be something not normally regarded as magnetic like aluminum (Its probably 35 years since I last looked at the theory of the things).
The significance is that there are 2 sets of bearings - the one at the end of the cable which is greased and will rumble if its dry - and a more delicate one supporting the pointer and the disc and spring attached to it. It's probably this bearing which is causing the problem - so lubricating the cable end one won't make any difference.
Access may well be by undoing the screws visible in the dial and pulling it out of its housing. The problem is that unless you have the right screwdriver you'll bruise the screws which will show. Its probably then a case of a clean and very gentle lubrication with single drops of machine oil - no sprays!
The thing works by magnetic attraction of the disc attached to the pointer - so the cable revolves a magnet - which attracts the weakly magnetic disc attached to the pointer. The disc may well be something not normally regarded as magnetic like aluminum (Its probably 35 years since I last looked at the theory of the things).
The significance is that there are 2 sets of bearings - the one at the end of the cable which is greased and will rumble if its dry - and a more delicate one supporting the pointer and the disc and spring attached to it. It's probably this bearing which is causing the problem - so lubricating the cable end one won't make any difference.
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tim leech
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tim leech
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tim leech
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MULLEY
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Ahem, triple echo this time 
Why dont u try what i did which worked perfectly. My speedo trip was bust, so got a 2nd hand unit & took the original drum off the bust one & swapped it over onto the speedo that worked.
Now before anyone says "oh i've tried that & i could get the mileage right as it rotated whilst i was pushing it back", just use some sellotape to allign the correct mileage up, then slot back in, pull sellotape off & voila, sorted.....
Why dont u try what i did which worked perfectly. My speedo trip was bust, so got a 2nd hand unit & took the original drum off the bust one & swapped it over onto the speedo that worked.
Now before anyone says "oh i've tried that & i could get the mileage right as it rotated whilst i was pushing it back", just use some sellotape to allign the correct mileage up, then slot back in, pull sellotape off & voila, sorted.....
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tim leech
I discovered that a longtime ago on how easy BX Haircuts are. Its one of the principle reasons I dont believe the BX I have is showing the true reading. That and the service sticker that said 180,000km on it when the car had 169,000 
Trouble is over in this country you do a MOT every six months with its past records it does not show anything as obvious. Yet another reason I believe for the speed error reading I have.
The other question is who has speedo needle twitch?
The 19TRS I have I think is the first BX I have had that has not had a slight twitch in fact its smooth as. The 16RS I have which has 280,000km on it has the phantom twitch. What causes that any ideas?
Trouble is over in this country you do a MOT every six months with its past records it does not show anything as obvious. Yet another reason I believe for the speed error reading I have. The other question is who has speedo needle twitch?
The 19TRS I have I think is the first BX I have had that has not had a slight twitch in fact its smooth as. The 16RS I have which has 280,000km on it has the phantom twitch. What causes that any ideas?
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tim leech
The speedo cable matey, as it was designed as left hand drive car and thats where the cable exits through the bulkhead its a much longer cable which is at a angle, putting a Kink in the cable after a while.
I changed mine tonight and the old one had 3 pronounced kinks in it, will see tomorrow when I put it back together if its works.
The mileage on the TGS of 246000 miles is correct as its backed up by every MOT and some history, plus you wouldnt clock a car with that miles on!
I changed mine tonight and the old one had 3 pronounced kinks in it, will see tomorrow when I put it back together if its works.
The mileage on the TGS of 246000 miles is correct as its backed up by every MOT and some history, plus you wouldnt clock a car with that miles on!
6am this morning went to get the TRS out of its Garage and what a bugger it was to start, time for a service me thinks.
Anyways 6am a day out from the shortest day down here in New Zealand means its Dark add to that its winter and last couple of days its been bloomin frosty in the morning as in -5c
So off we go down the road keeping a eye out for the little ice traps and slippery patches
Whats the speedo cable doing?
Making that familier clicking and a slight wobble perceptable, first time its ever done that but then the first time its been used in such prolonged cold conditions. Disapeared once things warmed up
Nearly got caught by one of those frosty patches
8mm of tyre tread on ice does not guarentee grip Ironically my pager for the Fire Service went off a few hours later. A van had managed to find that frost patch and ended up off the road, not surprising he had near bald front tyres 
No one hurt.
Yes Tim I forgot about the cable being threaded differantly. First BX I have encountered thats got a all in one cable the others I have had have been splits.
Anyways 6am a day out from the shortest day down here in New Zealand means its Dark add to that its winter and last couple of days its been bloomin frosty in the morning as in -5c
So off we go down the road keeping a eye out for the little ice traps and slippery patches
Whats the speedo cable doing?Making that familier clicking and a slight wobble perceptable, first time its ever done that but then the first time its been used in such prolonged cold conditions. Disapeared once things warmed up
Nearly got caught by one of those frosty patches
8mm of tyre tread on ice does not guarentee grip Ironically my pager for the Fire Service went off a few hours later. A van had managed to find that frost patch and ended up off the road, not surprising he had near bald front tyres No one hurt.Yes Tim I forgot about the cable being threaded differantly. First BX I have encountered thats got a all in one cable the others I have had have been splits.