Larry,
I'm one of those who have changed their TD's differential from the stock
5.125:1 gearing to 4.3:1 gears from an MGA. Obviously, this raises havoc with
the
speedometer/odometer. Last fall I had my speedometer refurbished by Margaret
Lucas (really) from MoMa of Albuquerque [ (505) 766-6661]. She obtained, and
installed, the proper gearing inside of my speedometer to compensate for the
difference. I highly recommend MoMa's service. Her email is Momanm@aol.com.
Bud Krueger
52TD
Larry Colen wrote:
> Overall I'm very happy with the five speed conversion utilizing the
> Ford Sierra transmission. The shift linkage has an annoying tendancy
> to resonate and buzz. It would be nice if the shift lever had a
> nylon bushing in it which doesn't have much slop, but still doesn't
> buzz.
>
> The kit was fairly straightforward and easy to install. All the pieces
> seem well made and the instructions were easy to follow.
>
> Speedo:
>
> The one thing not covered by the ford fivespeed conversion was
> recalibrating the speedometer. It seemed to read about 20% low. I've
> heard that it is possible to get different speedo drive gears for
> transmissions so that they work with different final drive ratios, and
> I wish that the kit had done this.
>
> While my car was on the dyno today, I took the opportunity to
> calibrate the speedometer. I did so by running it up to a particular
> speed by the speedometer then reading the digital guage on the chasis
> dyno.
>
> In fourth gear: fifth gear:
>
> indic. actual RPM
> 10 12.4
> 20 24.2
> 30 37.5 1950
> 40 48.6
> 50 60.2 3550 60.3 2930
>
> A week or so ago, I talked to Palo Alto Speedometer about replacing
> the right angle gear that screws onto the back of my speedometer with
> one that gears up properly. Unfortunately they say that they don't
> have one, they'd have to cut the cable in the middle and install a
> converter mid line.
>
> I'm going to investigate just buying a new speedometer that is geared
> properly for the transmission and which I'll be able to easily get
> speedometer cables for.
>
> If anybody else has solved these issues and has suggestions and parts
> numbers, it would be great if you could share them with me, and/or
> distributors and manufacturers of the kits.
>
> Larry
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