Speedo gear number 55

[fy469rtse]

Trying to get my speedos to read somewhere near accurate ,
35 mph reads 20 , no shaking or anything ,
Read the threads on hear to select the right one , removed old one to use number as a bench mark, roughly 5 mph per tooth increase,
The one I just removed has no part number , only 55 on it , teeth count the same
What do I have ? , not even on the chart,
Street tyres 275x60x15 , 3.23 rear, according to the chart , I'm needing 32 to 33 gear, ?

[fy469rtse]

Oh when you reply John , odometer works ,
Don't know how accurate ,
I'm starting to think that speedo needs re calibrating , this high a tooth ? Should have had it spinning its head off ,
Or am I thinking the wrong way around

[John_Kunkel]

The one I just removed has no part number , only 55 on it , teeth count the same

You counted 55 teeth? No such thing, 45 is the largest ever made.

You need a 30-tooth pinion YELLOW 52068152.

As always, use the odometer to verify the correct pinion not the speedo.

[fy469rtse]

cheers , i just knew you would answer,
with the gears , you count the teeth right ? to verify size , recounted , mopar speedo gear yellow in colour , possibly aftermarket

[Kern Dog]

Why count the teeth? The number is molded into the pinion.

[fy469rtse]

did both ,
will take a photo to verify,
i thought like john , that theres no such thing
mate of mine reckons truck one

[John_Kunkel]

You actually counted 55 teeth? Can't wait to see that pic.

[fy469rtse]

yep sorry left it over at afriends house, about an hour away
will be there on the week end will post some shots then

[fy469rtse]

55 speedo gear

[fy469rtse]

another

[fy469rtse]

another

[John_Kunkel]

You say you "counted" 55 teeth? I see only 33 and it's correct for your installation. The odometer is a better way to check accuracy.

If the speedo is incorrect with the correct pinion the speedo head is defective.

[fy469rtse]

Yes counted twice , yes speedo head kerplunk,
Got a new reproduction one on the way,
? Anyone tried one , guess I will be the patsy, gear much larger, should have taken a shot with 31 I had , almost a third smaller ?
It has 55 on it