Author Topic: Bump steer? 86 K10 with a 4" lift  (Read 15148 times)

Offline 1967KaiserM715

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #15 on: September 10, 2015, 06:15:30 PM »
1. Fronts are shorter

2. I'll get some pics tomorrow if someone doesn't post. I think my fronts might have a shim, but the rears sit right on the springs

3. I'll measure tomorrow
Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline Bishop1989

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #16 on: September 10, 2015, 06:58:05 PM »
Thanks Kaiser. Do you know if the front has to have shims?
1986 K10 Silverado 5.0L

Offline enaberif

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #17 on: September 10, 2015, 06:59:53 PM »
NO shims on either front or rear and both sit right on the axles. You'll need shorter shocks if you take out the lift kit as well.

Offline Bishop1989

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #18 on: September 10, 2015, 07:55:54 PM »
Thanks!
1986 K10 Silverado 5.0L

Offline Irish_Alley

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #19 on: September 11, 2015, 09:09:26 AM »
all shocks are the same.
there might/should be a wedge at the bottom of the springs.
cant help with the u bolt size been too long since i messed with k10s
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Bishop1989

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #20 on: September 11, 2015, 09:22:29 AM »
Does it have to have the wedge when I go to stock suspension?
1986 K10 Silverado 5.0L

Offline Irish_Alley

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #21 on: September 11, 2015, 09:26:30 AM »
come to think of it, i dont think so. most my trucks if i touch the suspension its for a lift and they all have the wedge. i cant think of when stock had anything more than a helper spring
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Magic1

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #22 on: September 11, 2015, 11:46:59 AM »
There is a difference between the front and rear shocks. As far as a block goes I don't think Chevy used one in those trucks. The springs just sit on top of the spring perches on top of the axle. There should be a short knub that sticks down from the bottom of the springs that sit inside a hole on top of the spring perches to line the axles up on both sides. The ubolts should be available from a parts store for whatever model truck you have as well as a junk yard or as a last resort you could buy them from a suspension lift company and cut off the access once installed.

Offline Magic1

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #23 on: September 11, 2015, 11:49:20 AM »
Lol. Didn't realize there was two pages of this before I posted.

Offline Irish_Alley

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #24 on: September 11, 2015, 12:12:25 PM »
on lift kits the shocks are the same. i got to quit posting bad info lol
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Don5

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #25 on: September 11, 2015, 02:21:01 PM »
on lift kits the shocks are the same. i got to quit posting bad info lol
[/b]

Oops! I know the feeling too. It sucks to get old. :)
It's been a LONG time since I have been called a newbie. Just sayin....

1979 GMC K15 355, SM 465, 205, 3.73 Dana 44 with a Spartan Locker, 12 bolt Eaton limited slip and 6 inch lift with 36 x 12.50 Super Swamper TSL's.

Offline Bishop1989

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #26 on: September 11, 2015, 03:37:17 PM »
Thanks for the help guys. I ordered Monroe Shocks. Buy 4 for the price of 3 from O'Reillys. The U bolts on the back will work but I need measurements for the front axle. What is the best way to get the blocks out? Should I jack the truck up to get weight off the springs and then unbolt the springs/axles?
1986 K10 Silverado 5.0L

Offline 1967KaiserM715

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #27 on: September 11, 2015, 04:19:12 PM »
jack up on the frame to relieve tension of springs, tires barely resting on the ground, remove U-Bolts, jack up on frame a little more to pull the blocks, lower truck onto axles, tighten U-bolts. repeat for other axle.

Might be a good idea to remove pitman arm, or steering arm from box, so you don't risk binding it up on the way down and getting stuck

give me 10 minutes I'll go measure U-bolts on my K10, and try to get some pictures
Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline timthescarrd

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #28 on: September 11, 2015, 04:30:50 PM »
U bolt's should be 5/8"x3"x7 5/8" and one 5/8"x3 1/2"x9 5/8", Also because of how they are tightened, it's suggested to never reuse them.  Cheapest I found when I was looking are these

Front
http://www.summitracing.com/parts/tfy-17701

Rear
http://www.summitracing.com/parts/tfy-17751

Offline 1967KaiserM715

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Re: Bump steer? 86 K10 with a 4" lift
« Reply #29 on: September 11, 2015, 04:44:23 PM »
U bolt's should be 5/8"x3"x7 5/8" and one 5/8"x3 1/2"x9 5/8", Also because of how they are tightened, it's suggested to never reuse them.  Cheapest I found when I was looking are these

Front
http://www.summitracing.com/parts/tfy-17701

Rear
http://www.summitracing.com/parts/tfy-17751

for front yes, my rears(with 4/1 springs) are 8 1/4" tall

and no shims, what I saw was a rubber flap, no clue why it is there, maybe its like some of the teflon sheets some new springs come with






Here you can see that rubber flap between the spring and perch


(Angle is a little off, 7 5/8" is correct)
Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)