When changing from a 3.70 rear gear to the 3.89, can I use the gear from the
1600? What gears are available?
On my old Ford, increasing or decreasing a tooth on the speedo gear makes
about 3% difference at the speedometer.
Richard
----- Original Message -----
From: <DMPDJ@aol.com>
To: <datsun-roadsters@autox.team.net>
Sent: Wednesday, May 18, 2005 4:07 PM
Subject: RE: Speedo off by 15mph
> Glen:
>
> You didn't mention how fast you were going. If you're doing 150, then
that's
> only a 10% deviation, lol.
>
> Tire size impacts speedometer readings. Maybe your tires are tall, or
maybe
> your speedo needle was removed and replaced in the wrong position on the
> spindle. You may also want to check the condition of the speedo cable
gears,
> might be some slippage due to wear. Check connections at trans and
indicator
> gauge to make sure they are secure.
>
> Hope this helps
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