Speedo Problems - Its not moving
 

Hi all, I just purchased my first Supra MKIII 1986.5, With a JDM engine in it. The previous owner said that he took it to 130mph and then the speedometer just cut off and went back to zero, and it hasnt moved since, so if someone has a idea on what I should replace or check that would be very helpfull. Thanks.

did you try tapping the speedo? Prob. a loose connection for the easiest thing to check. I forget if the speedo in the supra is cable driven?

It is cable driven. Check the speedo cable at the easiest point first. I believe it's on the passengers side and goes into the transmission.

http://memimage.cardomain.net/member...23_41_full.jpg

Hey thanks, I have to change the rear brakes today so I'll check the cable too. Thanks again.

It is the speedo cable pig tail they always break. I have replaced one on my 86.5 and my 87 when I got them they cost like 11 bucks from the dealer. If you want the part number I can get it for you . I guarentee when you pull it from the tranny it will be broke at the tranny end. It is such a tight bend and if they get a little moisture in them they break like nobodys business. just remember to lube the other end when you change it out.

Also check under the hood. The cable comes through the firewall, runs along a few hangers then drops down the passenger side to the trany. Two different mechanics worked on my '88 and did NOT re-hang the speedo cable properly so insulation melted while resting on the engine block...locking up the cable until it broke...

After the second time I no longer use mechanics. Fixed it myself. (pain in the ass too) Problem with our older car is not many "mechanics" know them well. They will say they do just to get your money but if you have never worked on your own Supra you are as qualified as most "mechanics". Start learning now and tomorrow you'll know more than the local shop (unless you are really lucky to have a Supra guy around)

I hope for your sake it's the lower 'pig-tail'. That's pretty easy. (2 piece cable)

Wow he was able to get the na up too 130mph? thats amazing mine must be really sick lol

They'll do it, if they're healthy.

Hey, I checked under the hood, the speedo cable seemed fine there, I didn't get a chance to look at where it connects to the tranny because of the humidity that I had in my area, so as soon as I finished my brakes I was wouped. Thanks for all the help I hope its simply the pig tail.

same thing happened to me and i took the whole cluster out and my cable had just fallen out of the back of my speedo... u might wanna check that.