Age of speedometer ??.

[Courthouse/Tom]

Hi,i've just obtained a Smiths speedometer,part number SN4477/30 1376.is it possible to tell from this part number what model year (years) this was used on ??.
Thanks, Tom.

[taupe]

My 63 travellers both have this speedo ... with a gold face and 90mph

Ive seen this listed in the Minor service parts list as suitable for 4.875 diff but this dosent make sense on my travellers which both have 4.22 diffs

I havent got to the bottom of the tpm being different from the 1098 saloons. The gearboxes are the ribbed type 10 MA and standard 4.22 diffs are fitted so I assume that the speedo gears in the gearbox are somehow different???

Perhaps early 10MA gearboxes had the 9 MA speedo gears or something like that.

Taupe

[mike.perry]

1376 TPM is probably a Mini speedo but would be suitable for a 3.9 possibly or 3.7 diff.

[taupe]

Hi

I just found this earlier post.

YES, the SN 4477/30 is for a 1098cc Minor between 1962 to 1964.If you give me your chassis number I should be able to give you the correct number but for your year it would probably be SN4466/00 or SN4477/00.

So it would appear that 1376 is the originally fitted TPM for 62-64 1098s?

I would think it unlikely that both of my travellers have had replacement speedos.

Taupe

[mike.perry]

A 1098 speedo between 1962-4 would have a gold face and 90mph dial.
SERIAL No.TPM MODEL RATIO MAX COLOUR FROM CHASSIS TO CHASSIS REMARKS
NUMBER NUMBER
X69982 1600 Series MO 80 mph White Trip Meter
X69982/5 1600 Series MO 80 mph White Trip Meter
X70620/2 1600 Series MM 4.55 80 mph White All Series MMs
X70620/3 1000 Series 2 5.375 130 kph White Early Series IIs
X70620/7 1000 Series 2 5.375 80 mph White Early Series IIs
511440109 1000 Series 2 5.375 80 mph Bronze Late Series IIs
SN4401/9 Series 3 80 mph Bronze 444801 579227 Saloon, Convertible
572906 Traveller
SN4401/15 1500 Series 3 4.55 80 mph Bronze 444801 579227 Saloon, Convertible
SN4406/00 1525 Series 3 4.55 80 mph Bronze
SN4406/08 Series 3 5.375 80 mph Bronze 579228 990289 Saloon, Convertible
SN4407/00 1504 Series 3 4.55 80 mph Bronze 572907 953663 Traveller
SN4410/00 1408 Series 5 4.22 90 mph Silver
SN4418/04 1376 Series 5 4.22 90 mph Black
SN4419/04 1376 Series 5 4.22 90 mph Black 1203563
SN4419/05 Series 5 4.22 kph Black 1082280 1206703 2 Door
1082284 4 Door
1082717 Convertible
1082537 Traveller
SN4421/00SA 1248 3.73 90 mph Black Mini
SN4421/12 1408 Series 5 4.22 90 mph Black
SN4423/00 1504 Series 5 4.55 90 mph Black LCV
SN4423/04 1408 Series 5 4.22 90 mph Black Traveller
SN4423/06 Series 5 4.22 90 mph Black 1206703 End Saloon, Conv. Trav
SN4423/07 Series 5 4.22 kph Black 1206703 End Saloon, Conv, Trav
SN4423/12 Series 5 4.22 90 mph Black Cars fitted with 145-14 tyres Saloon, Conv, Trav
SN4451/15 Series 3 4.55 80 mph Bronze 444801 572907 Traveller
SN4466/00 Series 3 4.55 80 mph Bronze 579228 953663 Saloon, Convertible
SN4467/00 1504 Series 3 4.55 80 mph Bronze
SN4470/30 1376 90 mph Bronze
SN4477/00 1504 Series 3 4.55 80 mph Bronze 953664 990289 Saloon, Convertible
957001 Onwards Disabled
SN4477/10 Series 3 5.375 80 mph Bronze 579228 990289 Saloon, Convertible
SN4477/31 Series 5 4.22 kph Bronze 990290 1082279 2 Door
1082283 4 Door
1082716 Convertible
1082536 Traveller
SN4477/80 Series 5 4.22 90 mph Bronze 990290 1082279 2 Door
1082283 4 Door
1082716 Convertible
1082536 Traveller
SN6401/56 1248 90 mph Black
SN8605/14 80 mph Bronze

Note This chart is unfinished Additional information is welcome
It should be born in mind when choosing a speedo to suit the differential that they nearly always over read

[taupe]

Thanks for that Mike

Ok

If Im reading that correctly then a series 5 with 4.22 diff should have a 1408 or a 1376 tpm

Theres only 2.5% difference between those so depends how worn your tyres are

So it looks likely that mine are correct although not on your list - perhaps the 4477/80 is a typo.

Funny I seem to remember recent posts saying that 1504 TPM was correct for later cars? It seems thats the case if fitted with a 4.55 diff.

So Tom... looks like your speedo will suit a 62-64 car and could be used on any standard series 5 with 4.22 diff.

Taupe

[Courthouse/Tom]

Thanks,guys,for an extremely thorough answer !!!!!!!!!!!

[dave1949]

Interesting thread with a surprising amount of variations on the speedo.

After reading I took a pic of a couple i have(the one on the left has Kilometers on it SN 4423/04 1408 with a round chrome edge the other SN 4419/04A 1376 with a pointed chrome edge and white circular lines in the centre)
Warning lights all look the same.

So why was there a difference in the shape of the chrome surround and finally how do you determine if a speedo is from a Mini.

[mike.perry]

The information was plagiarized from various publications, rally sites, autojumbles etc so I would appeciate more information and any corrections.
If the speedo was in a Mini when I took the serial number then I would say that it belongs to a Mini