First I wanted to thank everyone for all the great comments /
suggestions.
After applying some foil around the sensor wires, I have eliminated the
tach problem in neutral, but it still shows up when I run the vehicle.
I am in the process of replacing all the tach and sensor wiring with
shielded cable.
Hopefully that will do the trick to eliminate the noise from my Raptor
1200 controller.
If not, I may be contacting Ron from Black Sheep Technology about a
different sensor.
The information on the types of gears used in first and reverse probably
explains the noise.
I had my adaptor built from Electro Automotive.
If this was the problem, I would assume I would be hearing some noise in
all the gears, not just 1st and reverse.
Any suggestions on a different type of transmission lube?
I am currently using standard NAPA 75/90. I was afraid to use a
synthetic on a transmission this old.
Working out some bugs, but in general the truck runs great.
I really haven't pushed it yet, but it seems to have a lot of power at
my disposal.
Thanks Again;
Dennis
Elsberry, MO
http://www.evalbum.com/1366
-----Original Message-----
From: Jeff Shanab [mailto:
[hidden email]]
Sent: Thursday, July 02, 2009 8:25 AM
To:
[hidden email]
Subject: [EVDL] Tachometer and Transmission Issues
>
> I have 2 issues with my 65 Datsun Pickup that I hope someone can help
> with.
> First is with my tachometer.
> Purchased the 3" electric tach, sensor, and magnetic collar from
> EVparts.
> When I step on the accelerator, it immediately buries the tach at the
> maximum 7000 rpm.
> As I continue to accelerate, it stays at 7000 rpm.
> If I let off the accelerator, it drops back to what seems to be a more
> correct reading; 2000 - 2500 rpm.
> Press on the accelerator again, and it buries at 7000 rpm.
> I adjusted the sensor spacing out and in from the magnetic collar, and
> it seemed to make no difference.
>
> Second is with my transmission, or adaptor, or ?
> First and reverse gears are very noisy when accelerating. Kind of a
> grating, rubbing sound.
> 2nd, 3rd, 4th are very smooth and quiet.
> Could this be normal for these gears, or some other problem.
> Also seem to get a grating sound when slowing down to a stop in any
> gear.
> Don't know if this is the same issue, or if it could be the brakes, or
?
>
>
> Can any of the old Datsun people shed any light on this.
> Any suggestions would be greatly appreciated.
>
> Dennis
> Elsberry, MO
>
http://www.evalbum.com/1366>
My guess on the tack is it counts pulses and noise during acceleration
is being interpreted as more pulses and pegging the tach Perhaps a pi
filter?
May be difficult because of the wide range the tach operates in.
Get an AM radio and tune it between stations and take a test drive.
Use shielded cable grounded at only one end.
BTW, What controller do you have?
The transmission noise, well first and reverse are often the first to
wear out, reverse becasue it is a narrow gear for it's light use and
first because it has the highest torque multiplication. Perhaps if you
were running it as an ICE before, you just couldn't hear it?
How is the alignment?
How is it connected, some transmission had some float on the input
shaft that your adapter may not be handleing properly.
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