Speedo not working
Thread Starter
Junior Member
Joined: Jul 1999
Posts: 29
Likes: 0
From: Toronto, Ontario, Canada
Speedo not working
Ok, the T/A had a 350 w/carb swapped in, and the speedometer is not working. What could be causing the problem? I hope it is something as simple as a missing/loose connection. Where would be a good place to start looking?
------------------
1988 Pontiac Firebird
The 'F'
60° T-Stat w/Switch
1986 Pontiac Trans Am
350 5-Speed
Q-Jet
Edlebrock Performer
Accel Super Coil
Big*** ******* 275/50/15's on 346 Cragar Street Lites
------------------
1988 Pontiac Firebird
The 'F'
60° T-Stat w/Switch
1986 Pontiac Trans Am
350 5-Speed
Q-Jet
Edlebrock Performer
Accel Super Coil
Big*** ******* 275/50/15's on 346 Cragar Street Lites
Junior Member
Joined: Dec 1999
Posts: 81
Likes: 0
From: Plano, TX
If your talking about the 86, then you have a mechanical speedo.
Check the cable first.
It comes from the tranny and goes into the firewall and into the instrument cluster. Make sure the cable isnt fried or anything.
If the cable looks good i would look in the cluster next, and last the speedo gear in the tranny could be ****ed up.
Check the cable first.
It comes from the tranny and goes into the firewall and into the instrument cluster. Make sure the cable isnt fried or anything.
If the cable looks good i would look in the cluster next, and last the speedo gear in the tranny could be ****ed up.
Thread Starter
Junior Member
Joined: Jul 1999
Posts: 29
Likes: 0
From: Toronto, Ontario, Canada
I'll have a look at the cable then.....
Another quick question, if I get a 120MPH instrument cluster, I know it just pops in replacing my 85MPH, but will I have to calibrate the speedo for the new cluster, or will the electronics take care of that for me?
Another quick question, if I get a 120MPH instrument cluster, I know it just pops in replacing my 85MPH, but will I have to calibrate the speedo for the new cluster, or will the electronics take care of that for me?
Supreme Member
Joined: Jul 1999
Posts: 1,593
Likes: 3
From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
More help from Pete...your 86 probably has the electric speedo; check out the tech page in my sig for a link about installing one...
Pete
------------------
Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
Pete
------------------
Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
Supreme Member
Joined: Jul 1999
Posts: 1,593
Likes: 3
From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
Oh, yeah...you can just swap the speedo's and go....
Pete
------------------
Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
[This message has been edited by Petes 84Z28 (edited February 23, 2001).]
Pete
------------------
Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
[This message has been edited by Petes 84Z28 (edited February 23, 2001).]
Supreme Member
Joined: Dec 2000
Posts: 1,536
Likes: 0
From: Springfield, MO, USA
Car: 1986 Trans Am, 1991 Firebird
Engine: 355 TPI, 3.1L V6
Transmission: 700R4 in both
<font face="Verdana, Arial" size="2">Originally posted by Ratnose86SC:
If your talking about the 86, then you have a mechanical speedo.
</font>
If your talking about the 86, then you have a mechanical speedo.
</font>
Rob88F....even tho' the speedo is electric there is still a gear in there spinning that sends a signal through the wire to the speedo!! Sometimes that gear can break or slip off! Mine did!
------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.73's....oh joy) :P
Completely Stock
Soon to upgrade to a 350 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Headman Shorty Headers, Some sort of ported heads (undecided), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!
Thread
Thread Starter
Forum
Replies
Last Post
beachrodder
Transmissions and Drivetrain
3
Aug 7, 2015 04:27 PM
