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#1 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Rough ride
New at this so hang in
1969 c10 long bed heavy duty coil rear only on spid other than that its a stripper with a 307 3 speed on the tree a true boner truck bought it in arizona last week drove ir home to maine after a 2'' coil drop in thr front with new kyb shockes in front this truck pounds hard over the smallest of bumps harder then may 70 k10 or my 63 c10 and my 72 suburban just to name a few of them any help with this ? Monroe shocks maybe??? I put new michlelins all the way around!! Still hard hitting over small bumps |
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#2 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Rough ride
These are great riding trucks and their reputation speaks for that. You lightened up the front spring capacity while retaining the stiffer than standard rears. The added angle lightens up the rear to amplify the situation. Did you want to lower the rear? Thise spring will help x2. These trucks already have about a 2" rake and yours must have 4" or maybe more with the HD springs. Get 2" drop rear coils and you'll still have a rake, but everything down 2". The other thing that plays in are the shocks can be making it ride too tight.Might be stiffer than you'd want, especially with softer springs. Did you put shorter shocks on the front?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#3 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
Yes the kit came with lower shocks
i was going to to put the 4'' drop coils in the rear but opted to go with 2'' blocks whitch im doing today |
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#4 |
Scrapper 1
Join Date: Jan 2007
Location: Riverside Calif
Posts: 1,649
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Re: Rough ride
I like to mention something that has nothing to do with your handling of your truck.If your planing on taking out that 307 and putting in a 350.I think i have a way to save you some money and get a screamer of a engine plus you can keep your truck factory.
In 1966-67 there was a care that had a very Rare motor installed in it.It is the one body that GM did not change over from 1966 to go to the new 1967 body change.It was the Nova. In 1966 Nova had a very Special motor installed into there car's it was the Large Jernoal 327. Funny thing is the 307 is a Large jernoal black.Taking a reguler 350 crank and dropping it into a 307 block turns it into a Large jernoal 327 give you wicket RPM'S and horse power |
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#5 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
I have thought of that …
but for now i will keep it 307.. The truck only has 70,000 on it.. And it is vary clean when the motor needs work? Im sure thats what will happen thanks for your input |
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#6 | |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: Rough ride
68 and 69 327 were large journal 4” bore motors. They were base motors in Camaro and Nova through late 69 when the 307 supplanted tgec327. At least in Camaro. The 307 and 327 were both 3.25”stroke. The 307 is a small bore motor like a 305. Putting a 350 crank in makes for a 330 something cube striker 307 NOT a 327. Put 307 crank in 350 block is what you are thinking. But 350 makes more sense all the way around from $ and power standpoint. I have a 4 bolt main .030 327 in my Jimmy using a large journal 327 crank and ‘72 4 bolt 350 block. But is build a383 if doing it all again.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#7 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Rough ride
Chevelle body stayed the same 66/67. You said GM, so same thing for all A-bodies.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#8 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Rough ride
I'd try it without the shocks for a real quick drive to make sure it's the springs that are giving you the shock. Sounds like you need a much lighter spring out back!
In the old days they used charts like this and you would then pick from a supply of 50 different springs: http://1969pontiac.com/1969%20RPO%20...20Weights.html ...but now we get 2 springs, big block and small block! Which means the people that needed any of the 48 other springs wind up running something "wrong" for their truck.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#9 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Rough ride
Make sure you don't have 50 PSI in your tires.
Make sure the top shock mount is tight and not just snug and isnt jarring when you hit bumps.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#10 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
All great info.. Thanks
tires are aired to 45psi michelins ltx 5psi under.. Rear springs are factory but are hd.. Have not tried the shock disconnect yet... In the middle of an ice storm in maine right now.. As soon as it clears ill try that.. I think ill try all new radiator / cab mount / and hood bushings and rubbers thanks andrew |
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#11 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,641
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Re: Rough ride
Quote:
I agree with above posts regarding springs & shocks though..... that probably affects the ride more than tires that may be 10psi or so too high.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#12 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
What about spring pocket rubbers ?
For the front … ill order springs for the rear the front seams to do the pounding next week when the ice leaves ill install the parts thanks again |
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#13 | |
Registered User
Join Date: Sep 2017
Location: Ravenswood, West Virginia
Posts: 239
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Re: Rough ride
Quote:
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68 C10 long-fleet, Long and low is the way to go. factory: 307 sbc, SM465 4-speed, 12 bolt 4.11 rear end. 75,000 original miles. Build:Ole Blue Millennial and can drive stick. ![]() "Too many people have opinions on things they know nothing about. And the more ignorant they are, the more opinions they have." -Thomas Hildern |
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#14 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
This is whats up front
stock upper and lower a arms stock spindles with drum brakes 2'' drop coils from a outstanding company kyb excel-g drop shocks michelins 235 75 15 at 40 psi now 2.25" of clearance to the bump stops |
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#15 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Rough ride
Yes and if they are KYB gas a just shocks, they are a rough ride.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#16 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
Yes they are kyb shocks
any idea on a better shock?? |
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#17 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: Rough ride
Which KYB? I have the GR2 I think on my truck? They ride great. At some point I probably do Bilsteins, but that’s way down the list. The Gas-A-Just are known for a little rougher ride, but hard to believe it’s as you describe.
Are you riding on the bumpstops in the front? Or at least contacting them too soon in the travel? I run my rear tires at 28 psi (275 55 17) and the fronts at 35 (235 55 17) on my truck which is 4 1/2” front 7” rear drop ona DJM flip.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#18 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Rough ride
Great thing to check.
There has to be something lose or maybe even bound up. We don't know condition of ball joints, cross shafts, tie rod ends, sway bar bushings or any of the other factors that could be at play. I see they are 'lowered" shocks, are the shocks bottoming out? I'd still pull them and drive it as was mentioned early in this thread.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#19 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
All the cross shafts and ball joints seamed fine when i put the springs in…
drove it back from arizona to maine last week … the smallest of road imperfections!! You can feel alot .. Ive owned at least 30 c10s over the years big and small/ short and tall.. My k10 rides better for some reson .. |
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#20 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Rough ride
Of all things and without seeing a thing (got pictures), I feel your truck is sporting a decent rake. This puts more weight onto the already much heavier front. Combine that with softer than stock front springs with less travel to the heavier than stock rear springs and this plays about a triple whammy on your ride no doubt, no matter what other issue may need corrected. And if you have heavier that stock duty shocks on the rear you have a quadruple whammy. Actually, all thing combined multiply off each other, so could be more like a sixteenuple whammadoodle
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#21 |
67-72 parts collector,…
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Location: Mid-MO
Posts: 22,698
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Re: Rough ride
How about posting some pics of your front suspension?
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#22 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: Rough ride
I have stock length front shocks on my truck so as others have pointed out, the lowered shocks may be too short.
I actually have stock length front shocks on the back of my truck, too. They were perfect for a leaf-flipped drop and I relocated them a little more vertically by drilling the second hole in the stock upper shock plate.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#23 |
Registered User
Join Date: Jan 2017
Location: CORNISH MAINE
Posts: 26
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Re: Rough ride
I put 86 c10 rubbers under the coil springs in front ..
All new mounts under the cab and radiator support … all new hood rubbers /fender to hood .. And installed monroe stock size shocks .. Knocked the tires down to 40psi .. Much nicer ride now.. Im leaning to the coil rubbers that seamed to take out the most of the hammering on light pot holes … sway bar install next .. |
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