carmanfast68
New Member
when i drive the speedo jumps around i think it a 727 trains built by tci it has a 29 tooth gear in it that looks good how do i test the cable to see if it's good any help would be great.
jumping speedo
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buckshotbishop
Old Soul
does this only happen while you are doing burn outs? (lol)
a better description of jumping around would help and prevent you from getting stupid answers like ^
a better description of jumping around would help and prevent you from getting stupid answers like ^
Last time it was my speedo cable. Finally it broke, you might only have a few good wires left in the cable and its twisting or like the other guy said lube the cable because it's binding in its sleeve.
pishta
I know I'm right....
When it jumps, the cable is winding up and releasing in the sheath. There is no mechanical relationship between the cable and the needle itself. You can pull out and lube the cable, or just get a new universal one, tape, cut and stake properly and itll be good as new.
threewood
Well-Known Member
I have had mine bounce around when the cable was not securely attached to the speedo. Lube the cable and reinstall making sure it is threaded on tight.
Corrupt_Reverend
Well-Known Member
Back when I had my 300zx, this was a common problem that was caused by transmission fluid getting past the seal and into the cable. Not sure that can be the cause with TFs though.
thesiren74
Well-Known Member
Mine was a busted speedo gear in the trans.
Graphite.
ir3333
Well-Known Member
anybody try spraying silicone in the cable from the top?
Best solution, plus I used WD40 to help it travel down the sheath. Same graphite as is used in door locks. Hardest part is getting the instrument panel out far enough to pull the cable. Rest is easy. That's what I did with my old 71 Swinger. Speedo bounced and made a low noise. Did that and no more problems.
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