1966 K10 Suburban - Rancho RS5000X shock review - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Southcity · 01-17-2023, 03:26 PM

Vehicle - 1966 Chevy K10 Suburban w/292
Wheel/Tire = 16x6 steelies, BF Goodrich KM5 255/85R16
Type of roads driven = Gravel/dirt roads and driveways. Two-lane mountain roads with rough/uneven surfaces. Some highway driving.

I recently replaced the Rancho shocks that came on the truck when purchased. Without spending crazy money on new shocks or modifying the shock mount locations to support more shock options (i.e. remote reservoir shocks, adjustable shocks etc). Providing this info for the 64-66 K10 owners out there, hope it's helpful.

Previous shock setup:
Front - Rancho 5119
Rear - Rancho 5143
These were quite new but incredibly bouncy, horrible at absorbing just the slightest of rough or uneven roads. Cornering control on pavement was very poor.

I ended with the below, cost effective, zero modifications required.
Rancho RS5000X:
Front - Rancho RS55119
Rear - Rancho RS55143

Noticeable difference/improvement in ride comfort on or off road. Very good at absorbing uneven or rough road. They also improved cornering control and reduced roll to a degree. This also resulted in a much quieter interior since the harshness of the previous shocks was greatly reduced.

best view · 01-17-2023, 03:35 PM

What a beauty

**tim71** · 01-17-2023, 07:51 PM

Love that color and white top.

Duke Baldwin · 01-20-2023, 11:26 AM

Thank you. Great info!
I have a 66 K10 panel and always seek any good info.
Great looking K10 BTW!
Duke

57taskforce · 01-21-2023, 12:07 AM

Awesome review!

1976gmc20 · 01-21-2023, 01:41 PM

I love those old 292 sixes!

I assume you have the SM420 four speed?

Southcity · 01-23-2023, 01:10 PM

Quote:

Originally Posted by 1976gmc20

I love those old 292 sixes!

I assume you have the SM420 four speed?

Correct, SM420. Was surprised that the truck does quite well cruising at 60-65 mph on the HWY with this tranny/wheel/tire setup. But still contemplating a
Gear Vendors under/overdrive. That's a ways away though.

Southcity · 01-23-2023, 04:36 PM

Quote:

Originally Posted by Duke Baldwin

Thank you. Great info!
I have a 66 K10 panel and always seek any good info.
Great looking K10 BTW!
Duke

I've seen pics of your 66 panel, it's really nice. White and came out of Denver if I recall correctly?

Duke Baldwin · 02-03-2023, 07:57 PM

You are correct! I love it!

**Backpayne** · 02-05-2023, 09:45 PM

Thanks for the info! I'll be looking at shocks when I get everything back on the frame. I swapped a k10 suspension onto my '66 frame so I'll have to do some measuring once thw weight is on the suspension.

Slowclimb · 11-04-2023, 12:13 AM

Thanks for the info just ordered them for my K10. It was hard to find the rear with the 3/4 that worked.

01-17-2023, 03:26 PM	#1
Southcity Registered User Join Date: Aug 2007 Location: Redwood City, CA Posts: 1,177	1966 K10 Suburban - Rancho RS5000X shock review Vehicle - 1966 Chevy K10 Suburban w/292 Wheel/Tire = 16x6 steelies, BF Goodrich KM5 255/85R16 Type of roads driven = Gravel/dirt roads and driveways. Two-lane mountain roads with rough/uneven surfaces. Some highway driving. I recently replaced the Rancho shocks that came on the truck when purchased. Without spending crazy money on new shocks or modifying the shock mount locations to support more shock options (i.e. remote reservoir shocks, adjustable shocks etc). Providing this info for the 64-66 K10 owners out there, hope it's helpful. Previous shock setup: Front - Rancho 5119 Rear - Rancho 5143 These were quite new but incredibly bouncy, horrible at absorbing just the slightest of rough or uneven roads. Cornering control on pavement was very poor. I ended with the below, cost effective, zero modifications required. Rancho RS5000X: Front - Rancho RS55119 Rear - Rancho RS55143 Noticeable difference/improvement in ride comfort on or off road. Very good at absorbing uneven or rough road. They also improved cornering control and reduced roll to a degree. This also resulted in a much quieter interior since the harshness of the previous shocks was greatly reduced. Attached Images __________________ 66 GMC Suburban Custom 66 Chevy K10 Suburban

01-17-2023, 03:35 PM	#2
best view Registered User Join Date: Apr 2009 Location: newbury new hampsire Posts: 2,150	Re: 1966 K10 Suburban - Rancho RS5000X shock review What a beauty

01-17-2023, 07:51 PM	#3
tim71 Senior Member Join Date: Oct 2015 Location: Brownsburg, IN Posts: 1,103	Re: 1966 K10 Suburban - Rancho RS5000X shock review Love that color and white top. __________________ 1972 Blazer Highlander 1971 GMC K1500 SWB (sold) 2004 Corvette Z06 CE

01-20-2023, 11:26 AM	#4
Duke Baldwin Registered User Join Date: Feb 2022 Location: Elkton, Oregon Posts: 6	Re: 1966 K10 Suburban - Rancho RS5000X shock review Thank you. Great info! I have a 66 K10 panel and always seek any good info. Great looking K10 BTW! Duke

01-21-2023, 12:07 AM	#5
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,485	Re: 1966 K10 Suburban - Rancho RS5000X shock review Awesome review! __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

01-21-2023, 01:41 PM	#6
1976gmc20 Registered User Join Date: May 2015 Location: Montana Posts: 3,696	Re: 1966 K10 Suburban - Rancho RS5000X shock review I love those old 292 sixes! I assume you have the SM420 four speed? __________________ Current/past Chevy/GMC trucks: 1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner

02-03-2023, 07:57 PM	#9
Duke Baldwin Registered User Join Date: Feb 2022 Location: Elkton, Oregon Posts: 6	Re: 1966 K10 Suburban - Rancho RS5000X shock review You are correct! I love it!

02-05-2023, 09:45 PM	#10
Backpayne Senior Member Join Date: Nov 2015 Location: Seligman, MO Posts: 642	Re: 1966 K10 Suburban - Rancho RS5000X shock review Thanks for the info! I'll be looking at shocks when I get everything back on the frame. I swapped a k10 suspension onto my '66 frame so I'll have to do some measuring once thw weight is on the suspension.

11-04-2023, 12:13 AM	#11
Slowclimb Registered User Join Date: Jan 2016 Location: Campbell River B.C. Canada Posts: 53	Re: 1966 K10 Suburban - Rancho RS5000X shock review Thanks for the info just ordered them for my K10. It was hard to find the rear with the 3/4 that worked.



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