speedo is off when speed is over 50 mph or higher
#1
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Location: Leicester NC
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Car: 89 Iroc,
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 327
speedo is off when speed is over 50 mph or higher
1989 Iroc .Speedo is accurate up to 50 mph.After that it really speeds up.Like at 70mph gauge shows 90 mph.Any Ideas?
#2
Senior Member
Re: speedo is off when speed is over 50 mph or higher
Your cable is slipping, needs lube or better yet...don't drive it in the winter.
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Car: 89 Iroc,
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 327
Re: speedo is off when speed is over 50 mph or higher
It has been an issue since i got the car.I got the trans gears dialed in hoping that was the problem,but no.It is dead on until 50 ish.My gut tells me there is a problem with the speedo head.I will pull the cable,clean and lube it next.
#5
Senior Member
Re: speedo is off when speed is over 50 mph or higher
No, his cable is slipping and getting caught up (1 after the other...). I went threw this myself WAY back in the day. Guy needs to get a econobox daily driver. His pinch welds and front left corner floor metal aren't going to last long...
#6
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Car: 89 Iroc,
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 327
Re: speedo is off when speed is over 50 mph or higher
I have had a drill turning the cable .Seems fine.I will pull the cable out of the housing and check and lube it. Its not a daily driver,I drive my old TPI 67 gmc pickup everyday.Iroc is for nice and dry days.
#7
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: speedo is off when speed is over 50 mph or higher
Do you have headers? I have read that with headers, the cable gets melted where it comes really close to the pipes. Check for that and you might need to add some heat shielding.
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#8
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Join Date: Dec 2014
Location: Leicester NC
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Car: 89 Iroc,
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 327
Re: speedo is off when speed is over 50 mph or higher
Do you have headers? I have read that with headers, the cable gets melted where it comes really close to the pipes. Check for that and you might need to add some heat shielding.
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