Author Topic: Getrag speedo drive  (Read 497 times)

cfm65@me.com

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Getrag speedo drive
« on: December 09, 2020, 06:04:04 »
Hi Guys,
It seems from what I have found in the archives,  a 19% reduction gearbox is the ball park reduction required between the Getrag 265/6 and the Pagoda speedo. Also reverse the anti clock wise output to clock wise input to the speedo.
I have a 3.92 rear end and 185/80/14 tyres.
Much appreciated.
Chris
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top

PeterPortugal

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Re: Getrag speedo drive
« Reply #1 on: December 09, 2020, 07:57:04 »
Hi Chris,

I have  Getrag 265 box but I still have not fitted it.

I found a company called speedy cable in Wales who offer a custom cable for this application.

Maybe they can help you to confirm?

Regards

Peter
1963 220se Cabrio
1968 280se Coupe

cfm65@me.com

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Re: Getrag speedo drive
« Reply #2 on: December 09, 2020, 08:20:00 »
TKS Peter,
I%u2019ll check with them.
I modified the Pagoda cable in less than a minute.
However, the big problem seems to be the Getrag output drive is anti clock wise and the MB speedo requires a clock wise input.
I am very surprised not to have picked it up during my research.
Regards
Chris
Cape Town

APOLOGIES MY MISTAKE
« Last Edit: December 12, 2020, 02:52:14 by cfm65@me.com »
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top

stickandrudderman

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Re: Getrag speedo drive
« Reply #3 on: December 09, 2020, 15:14:05 »
I don't believe that's true. I've fitted Getrag boxes with mechanical speedo drives before and the Speedy Cables cable and speedo calibration was all that was needed.

PeterPortugal

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Re: Getrag speedo drive
« Reply #4 on: December 09, 2020, 15:53:50 »
Chris - the chap at W113.EU who also sells Getrag conversion kits never mentions anything about the speedo drive direction.

I would check your source for this.
1963 220se Cabrio
1968 280se Coupe

cfm65@me.com

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Re: Getrag speedo drive
« Reply #5 on: December 09, 2020, 18:54:40 »
Thanks Stick and Peter,
I%u2019ll have another look in the morning and report back.
Stick, is the speedo calibration achieved by a small gearbox or an adjustment on/in the instrument.
Much appreciated.
Chris

APOLOGIES, MY MISTAKE. ROTATION IS THE SAME
« Last Edit: December 12, 2020, 02:56:56 by cfm65@me.com »
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top

Shvegel

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Re: Getrag speedo drive
« Reply #6 on: May 04, 2021, 12:34:05 »
if you do it at the speedometer you will still have the error in the odometer.  The odometer is simply a gear drive off the speedometer cable where the speedometer is a magnetic drive so they are independent of one another.  you can adjust how the needle of the speedometer reacts to the spinning magnet but you can't adjust how the gears of the odometer react.

cfm65@me.com

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Re: Getrag speedo drive
« Reply #7 on: May 04, 2021, 15:21:30 »
Tks Shvegel,
Yes, correct. However I found the speedo not far out. If I remember correctly it was under reading 6 to 8 kph and I am happy to live with it as is.
Regards
Chris
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top