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RE: O.D Speedo Drive Gear

To: "john ruse" <>
Subject: RE: O.D Speedo Drive Gear
From: (Bert Palte)
Date: Sat, 21 Dec 96 19:49:50 +0100
John R. wrote:

>You guys are forgetting THE gearbox parts source!!
>How many pinions do you need?!!


For my 1970 B, the correct type indication would be:

Pinion - Speedo - 21 teeth (white), # 37 H 3463 
Gear - Speedo Drive - 8 teeth (blue), # 37 H 3464, NLA 

(NLA = No Longer Available, an alas, all too common abbreviation)

My non-OD current gearbox has a quite different gear set, but I checked from
parts lists, that the ratio is (26:10) teeth, as opposed to (21:8) teeth,
only a 1% difference, so that's to all intents and purposes the same.

BTW my speedo reads "800" but that is rev/km, that should be 1288 (1280, my
parts list says)
rev/mile.That's for a chrome bumper car. 
A rubber bumper car should have a 1000 rev/mile speedo and, of course, a
1000 rev/mile speedo drive. 

The gears that are in my (from a1975 B) O/D now (or, rather, should be, as 
the pinion was actually missing)   have 20 teeth (red) (# 37 H 8845) and 
6 teeth (red) (# 37 H 8844).  
These  latter gears are the parts that Christopher needs.

BTW the pinion is steel, "red" and "white" refer only to paint marks to keep
them apart.
The ring gear is nylon, moulded around a steel ring. The colour of the nylon
is either red or blue.

I forgot to mention that I do not dare to put my 'new' gearbox "as is" under
the car, I'd
rather change the seals, bearings, gaskets etc. first.

I started a thread on this subject  about a year ago an found the 
combined experience on this list and the comments that I received VERY helpful!


"Never try to invert the wheel for the second time.
Always see if someone else  has been there before".

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