What's the difference between the 5k and 8k OEM tachometers? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sgaylord · 05-27-2010, 09:40 AM

I have a NOS Tach dash I just installed in my 69 burb and it's acting weird. The indicator on the Tach gets stuck sometimes and is not that accurate above 1k. It wont even go past 2500RPM's. It's one of the 5k versions and I am wondering if it's an issue with the Tach or do I have one that was made for 6cyl engines? My burb has a 396.

Thanks,
Steve

**71blksuper4x4** · 05-27-2010, 09:45 AM

There aren't such things as 8K OEM tachs for our trucks. There are custom made camaro tach dashes, or Cheyenne SuperMan's 8k factory looking tach dashes. Trevor

Hammer500 · 05-27-2010, 09:48 AM

LMC is now offering and 8000 rpm tach dash for our trucks. Don't know who makes it though.

sgaylord · 05-27-2010, 09:49 AM

Hi Trevor,

Thanks for the quick reply. Not to be argumentative but I see that Southern Kentucky sells an 8k Tach. Not sure if that is just aftermarket though.

Steve

**71blksuper4x4** · 05-27-2010, 10:23 AM

No problem, I didn't know that others started selling them. Gary Terry (Cheyenne SuperMan) was the one who first started carrying them back in 2006 or 2007. Trevor

**71blksuper4x4** · 05-27-2010, 10:24 AM

They aren't stock though. Only 5K tachs were made 6 cyl and 8 cyl. They are different calibrated tachs, but they both redline at 5k. Trevor

sgaylord · 05-27-2010, 10:28 AM

Trevor,
Any way to tell what I have (6cyl or 8cyl)? All I know is that the dash was supposed to be NOS. The lack of grease and presence of patina lends me to believe this to be true. The person I got it from does not know if it's for a 6cyl or 8cyl. I guess either way I have to replace the Tach.

Thanks,
Steve

**71blksuper4x4** · 05-27-2010, 10:32 AM

Normally, the tach head has an ink print on the back side of it that states whether or not it is for a 6 cyl or 8 cyl. With being NOS, it may not state. Trevor

sgaylord · 05-27-2010, 10:35 AM

I did not see anything on the rear of the bezel stating it was. I only saw "Coil" and "12v". I have not pulled the gauge out of the cluster though.

**71blksuper4x4** · 05-27-2010, 10:42 AM

I don't think it will tell you anything after you pull it out, you might try and look for a part number or sticker on the back of the gauge face that might have a number on it. Different numbers between 6 and 8 cyl. Other than that, ther is not much you can do for knowing if it's for a 6 or 8 cyl. Trevor

sgaylord · 05-27-2010, 11:01 AM

Thanks Trevor for all your help.

Steve

05-27-2010, 09:40 AM	#1
sgaylord Project collector Join Date: Mar 2006 Location: Sanderson, Fl Posts: 700	What's the difference between the 5k and 8k OEM tachometers? I have a NOS Tach dash I just installed in my 69 burb and it's acting weird. The indicator on the Tach gets stuck sometimes and is not that accurate above 1k. It wont even go past 2500RPM's. It's one of the 5k versions and I am wondering if it's an issue with the Tach or do I have one that was made for 6cyl engines? My burb has a 396. Thanks, Steve __________________ 69 CST-10 SWB (disguised as a 67) 383/700r4 Jezebel Jezebel 3.0 NEW!!! 2020 GMC 3500 Denali Duramax 2016 Harley Street Glide CVO Roll Tide!

05-27-2010, 09:45 AM	#2
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: What's the difference between the 5k and 8k OEM tachometers? There aren't such things as 8K OEM tachs for our trucks. There are custom made camaro tach dashes, or Cheyenne SuperMan's 8k factory looking tach dashes. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-27-2010, 09:48 AM	#3
Hammer500 Registered User Join Date: May 2009 Location: Calgary, Alberta Posts: 115	Re: What's the difference between the 5k and 8k OEM tachometers? LMC is now offering and 8000 rpm tach dash for our trucks. Don't know who makes it though. __________________ 69 Chev C/10 350/200 4R LWB 69 Chev K/20 4x4 350/4sp LWB 69 GMC Sierra Grande 396/400 LWB

05-27-2010, 09:49 AM	#4
sgaylord Project collector Join Date: Mar 2006 Location: Sanderson, Fl Posts: 700	Re: What's the difference between the 5k and 8k OEM tachometers? Hi Trevor, Thanks for the quick reply. Not to be argumentative but I see that Southern Kentucky sells an 8k Tach. Not sure if that is just aftermarket though. Steve __________________ 69 CST-10 SWB (disguised as a 67) 383/700r4 Jezebel Jezebel 3.0 NEW!!! 2020 GMC 3500 Denali Duramax 2016 Harley Street Glide CVO Roll Tide!

05-27-2010, 10:23 AM	#5
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: What's the difference between the 5k and 8k OEM tachometers? No problem, I didn't know that others started selling them. Gary Terry (Cheyenne SuperMan) was the one who first started carrying them back in 2006 or 2007. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-27-2010, 10:24 AM	#6
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: What's the difference between the 5k and 8k OEM tachometers? They aren't stock though. Only 5K tachs were made 6 cyl and 8 cyl. They are different calibrated tachs, but they both redline at 5k. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-27-2010, 10:28 AM	#7
sgaylord Project collector Join Date: Mar 2006 Location: Sanderson, Fl Posts: 700	Re: What's the difference between the 5k and 8k OEM tachometers? Trevor, Any way to tell what I have (6cyl or 8cyl)? All I know is that the dash was supposed to be NOS. The lack of grease and presence of patina lends me to believe this to be true. The person I got it from does not know if it's for a 6cyl or 8cyl. I guess either way I have to replace the Tach. Thanks, Steve __________________ 69 CST-10 SWB (disguised as a 67) 383/700r4 Jezebel Jezebel 3.0 NEW!!! 2020 GMC 3500 Denali Duramax 2016 Harley Street Glide CVO Roll Tide!

05-27-2010, 10:32 AM	#8
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: What's the difference between the 5k and 8k OEM tachometers? Normally, the tach head has an ink print on the back side of it that states whether or not it is for a 6 cyl or 8 cyl. With being NOS, it may not state. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-27-2010, 10:35 AM	#9
sgaylord Project collector Join Date: Mar 2006 Location: Sanderson, Fl Posts: 700	Re: What's the difference between the 5k and 8k OEM tachometers? I did not see anything on the rear of the bezel stating it was. I only saw "Coil" and "12v". I have not pulled the gauge out of the cluster though. __________________ 69 CST-10 SWB (disguised as a 67) 383/700r4 Jezebel Jezebel 3.0 NEW!!! 2020 GMC 3500 Denali Duramax 2016 Harley Street Glide CVO Roll Tide!

05-27-2010, 10:42 AM	#10
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: What's the difference between the 5k and 8k OEM tachometers? I don't think it will tell you anything after you pull it out, you might try and look for a part number or sticker on the back of the gauge face that might have a number on it. Different numbers between 6 and 8 cyl. Other than that, ther is not much you can do for knowing if it's for a 6 or 8 cyl. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

05-27-2010, 11:01 AM	#11
sgaylord Project collector Join Date: Mar 2006 Location: Sanderson, Fl Posts: 700	Re: What's the difference between the 5k and 8k OEM tachometers? Thanks Trevor for all your help. Steve __________________ 69 CST-10 SWB (disguised as a 67) 383/700r4 Jezebel Jezebel 3.0 NEW!!! 2020 GMC 3500 Denali Duramax 2016 Harley Street Glide CVO Roll Tide!

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