Author Topic: Speedometer doing weird things  (Read 1035 times)

0 Members and 1 Guest are viewing this topic.

Offline Crisis

  • Jr. Member
  • *
  • Posts: 45
  • Referrals: 0
Speedometer doing weird things
« on: November 15, 2018, 03:06:53 PM »
Hello,

I've a '79 TA with a 403ci. I've replaced my old speedometer by a new one which do strange things.
When i drive Under 45mph, the speedo is under the real speed. Beyond 45mph, the speedo is upper the real speed. The more I accelerate, the upper he becomes. When I drive at 70mph, it shows 80mph. the needle don't bounce but looks free, moving to right and to left when i Accelerate and decelerate fast and quickly.
And the miles counter is very fast. When I drive on 5 miles, the counter adds 30 miles...

Wires good and speedogear is the good one (regarding my wheels, the speedgear into my transmission and the ratio of rear axle).
Is my speedometer is dead ?

Is anybody has an idea about this ?

Thank you all

Chris

(sorry for my english)

Offline Nexus

  • Adv. Member
  • ****
  • Posts: 2953
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #1 on: January 06, 2019, 09:47:52 AM »
There is a small gear on the transmission...you'll have to replace this gear with the next size down or the next size up to calibrate it properly. There generally several suppliers around that can help with this...that is if you are completely sure it isn't the speedo cable being broken!!
Charlie
1979 Transpit...(T/A Clone) (19 years and counting)

Offline Aus78Formula

  • Adv. Member
  • ****
  • Posts: 2179
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #2 on: January 06, 2019, 05:30:01 PM »
This was on another forum, I think he got it sorted. The miles added was incorrect, which threw most off.

Offline Nexus

  • Adv. Member
  • ****
  • Posts: 2953
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #3 on: January 07, 2019, 07:45:09 PM »
Ahh...ok...perfect...glad it's been solved
Charlie
1979 Transpit...(T/A Clone) (19 years and counting)

Offline Crisis

  • Jr. Member
  • *
  • Posts: 45
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #4 on: January 23, 2019, 02:02:49 PM »
Hello !

Sadly, it has not been resolved and it's not a gear size problem.
My brand new speedo has never worked as it should. =(
The needle is floating and shows wrong speed because of a too much relaxed spring.

Offline Nexus

  • Adv. Member
  • ****
  • Posts: 2953
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #5 on: January 25, 2019, 05:32:24 AM »
Ahh...so the next question comes up...How do you fix that?

Need to send it to someone or can you try and resolve it on your own?
Charlie
1979 Transpit...(T/A Clone) (19 years and counting)

Offline Crisis

  • Jr. Member
  • *
  • Posts: 45
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #6 on: February 09, 2019, 07:35:04 AM »
Hello,

Classic Industries seems to be OK to send me a tested brand new one...
Wait  & see. =p

Regards

Offline Crisis

  • Jr. Member
  • *
  • Posts: 45
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #7 on: February 12, 2019, 05:06:11 PM »
Hello again,

I juste want to write that I'm impressed by the kindness of Classic's team which is testing a new speedo before sending it to me.  :o

Chris

Offline Nexus

  • Adv. Member
  • ****
  • Posts: 2953
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #8 on: February 16, 2019, 09:20:26 PM »
That's great indeed. I haven't heard of too many negative things. Actually, I can't remember anything

glad to her that
Charlie
1979 Transpit...(T/A Clone) (19 years and counting)

Offline Aus78Formula

  • Adv. Member
  • ****
  • Posts: 2179
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #9 on: February 17, 2019, 07:00:45 AM »
Used speedos are everywhere if needed to test the setup cheaply to prove it works normally prior to new unit. Maybe you did that with older speedo.

Offline Crisis

  • Jr. Member
  • *
  • Posts: 45
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #10 on: April 26, 2019, 02:42:30 PM »
Hello,

Finaly, ClassicIndustries has tested all his OER firebird 70-81 speedos that he has and they are all wrong.
So, Classic has done a refund and returned a check to me. Very kind, two years after bought this product !
I've ordered an used speedo on ebay and switched the face plate of the used by the one of the wrong new.

All good now. =D

Offline Nexus

  • Adv. Member
  • ****
  • Posts: 2953
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #11 on: May 23, 2019, 10:08:05 PM »
AHH...right on...glad you found a solution
Charlie
1979 Transpit...(T/A Clone) (19 years and counting)

Offline Aus78Formula

  • Adv. Member
  • ****
  • Posts: 2179
  • Referrals: 0
Re: Speedometer doing weird things
« Reply #12 on: May 23, 2019, 10:43:26 PM »
What in particular is wrong with the new units, as in what tests did he do to determine it's not just another customer complaining?!