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**smokinn** · 02-22-2003, 12:33 AM

OK

My truck 82 short box 4x4 has a 4" lift with 33"s tires. When i drive it never shows the correct speed. The needle just jumps all over the place. Is there anyway to fix it? So it shows the correct speed. Besides disconnecting it compleatly.

Thanks
Jason

Tom · 02-22-2003, 01:39 AM

We discoused this a while ago. Either the cable isent connecting fully, or the drive/driven gears in the trans are bad.

Mine did the same thing, when it was steady it read 10mph faster then I was going. Now with the new tranny it dosent jump anymore, but still reads 10mph over

Prerunner1982 · 02-22-2003, 03:43 AM

do you happen to have cruise control on it? mine did this as well, ended up the cruise control box on driver side inner fender was bad. eliminated it and went with one piece speedo cable.

87gmc · 02-22-2003, 07:31 AM

Do you have a Stereo in there. Mine jumps all over the place also but only when my stereo is turned up loud. But my speedo is also off i think it may also have to do with the tires. I know you can get them calibrated but im not sure if that what it needs or not.

**smokinn** · 02-22-2003, 10:09 AM

Yes it has cruise. Might have to try that idea of getting rid of the cruise. It dosent work any way. As far as the stereo i cant see that as the problem but will try anyting.

Thanks
Jason

Prerunner1982 · 02-22-2003, 03:23 PM

my cruise didnt work either.. if you take it out, you are going to have to replace the speedo cable, so if the cable is damaged elsewhere you will fix it anyway.

c10scotty · 02-22-2003, 05:55 PM

it will be off because of your tires, even when you get the jump fixed...just so you know.

Ryan Flowers · 02-22-2003, 09:57 PM

Smokinn,

When I lifted my 85 Suburban it did the same thing. I yanked out the cruise control and everything was fine. But you might want to make sure the speedometer cable is tightened on the dash and on your transmission first that might fix it. (takes about 5 min.)Also like C-10Scotty said it will always be off because of the larger tires.

02-22-2003, 12:33 AM	#1
smokinn Senior Member Join Date: Aug 2002 Location: omaha,Ne Posts: 617	Mph? OK My truck 82 short box 4x4 has a 4" lift with 33"s tires. When i drive it never shows the correct speed. The needle just jumps all over the place. Is there anyway to fix it? So it shows the correct speed. Besides disconnecting it compleatly. Thanks Jason

02-22-2003, 01:39 AM	#2
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,750	We discoused this a while ago. Either the cable isent connecting fully, or the drive/driven gears in the trans are bad. Mine did the same thing, when it was steady it read 10mph faster then I was going. Now with the new tranny it dosent jump anymore, but still reads 10mph over __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

02-22-2003, 03:43 AM	#3
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	do you happen to have cruise control on it? mine did this as well, ended up the cruise control box on driver side inner fender was bad. eliminated it and went with one piece speedo cable. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-22-2003, 07:31 AM	#4
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 253	Do you have a Stereo in there. Mine jumps all over the place also but only when my stereo is turned up loud. But my speedo is also off i think it may also have to do with the tires. I know you can get them calibrated but im not sure if that what it needs or not. __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-22-2003, 03:23 PM	#6
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	my cruise didnt work either.. if you take it out, you are going to have to replace the speedo cable, so if the cable is damaged elsewhere you will fix it anyway. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-22-2003, 10:09 AM	#5
smokinn Senior Member Join Date: Aug 2002 Location: omaha,Ne Posts: 617	Yes it has cruise. Might have to try that idea of getting rid of the cruise. It dosent work any way. As far as the stereo i cant see that as the problem but will try anyting. Thanks Jason

02-22-2003, 05:55 PM	#7
c10scotty ~THE SILVER BULLET~ Join Date: Oct 2002 Location: WYOMING Posts: 285	it will be off because of your tires, even when you get the jump fixed...just so you know. __________________ ~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~

02-22-2003, 09:57 PM	#8
Ryan Flowers No Brakes Club Join Date: Jan 2003 Location: Carthage, N.C. Posts: 263	Smokinn, When I lifted my 85 Suburban it did the same thing. I yanked out the cruise control and everything was fine. But you might want to make sure the speedometer cable is tightened on the dash and on your transmission first that might fix it. (takes about 5 min.)Also like C-10Scotty said it will always be off because of the larger tires. __________________ Ryan Flowers 85 GMC Suburban 4x4 379 90 GMC Suburban 4x4 383 01 Chevy Suburban 2x4 350 Click here to email me Click here to visit my web site



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