autometer speedo problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ackattack · 10-28-2003, 11:20 AM

I recently put an autometer speedo in my truck and it seems off.

When I'm rolling along 5 - 10 mph the needle is still sittitng on the 0 mark. And then driving at around it seems 5 mph slow (so I'm going 5 mph too fast) Anyone else with this problem? Should I call Autometer?

My factory speedo was about 3% fast before I switched to this one (due to smaller tires).

Dean23 · 10-28-2003, 12:34 PM

is it a cable driven speedo or a electric one. maybe u could change the gear in the trans and it will correct it for u

Ackattack · 10-29-2003, 12:32 AM

It is a cable drive, and it's not a gear thing. It's just off set 5 mph at all points.

boozel67 · 10-29-2003, 07:32 AM

the auto-meter phantom i have was calibrated at 2000rpm's it reads 60mph. that is 2000 rotations of the speedo cable itself.
i just took the truck to a garage and they put new speedo gears in the tranny. to many numbers to take into consideration for me like final tranny ratio, rear end ratio, tire size...

Dean23 · 10-29-2003, 11:08 AM

if it is out by 5 mph throughout the whole range it sounds like the driven gear is wrong to me....

Ackattack · 10-29-2003, 11:42 AM

it worked fine with the factory speedo. I think I'll give autometer a call

10-28-2003, 11:20 AM	#1
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	autometer speedo problem I recently put an autometer speedo in my truck and it seems off. When I'm rolling along 5 - 10 mph the needle is still sittitng on the 0 mark. And then driving at around it seems 5 mph slow (so I'm going 5 mph too fast) Anyone else with this problem? Should I call Autometer? My factory speedo was about 3% fast before I switched to this one (due to smaller tires). __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

10-28-2003, 12:34 PM	#2
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	is it a cable driven speedo or a electric one. maybe u could change the gear in the trans and it will correct it for u __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

10-29-2003, 12:32 AM	#3
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	It is a cable drive, and it's not a gear thing. It's just off set 5 mph at all points. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

10-29-2003, 07:32 AM	#4
boozel67 FORSALE Join Date: Apr 2003 Location: central pa Posts: 95	the auto-meter phantom i have was calibrated at 2000rpm's it reads 60mph. that is 2000 rotations of the speedo cable itself. i just took the truck to a garage and they put new speedo gears in the tranny. to many numbers to take into consideration for me like final tranny ratio, rear end ratio, tire size... __________________ 1967 chevy 1/2 ton short step

10-29-2003, 11:08 AM	#5
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	if it is out by 5 mph throughout the whole range it sounds like the driven gear is wrong to me.... __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

10-29-2003, 11:42 AM	#6
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	it worked fine with the factory speedo. I think I'll give autometer a call __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index



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