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Re: 78 Chevy 4x4 still bucking at 33-35 mph, help?
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CarGuru > 4 x 4 > Re: 78 Chevy 4x4 still bucking at 33-35 mph, help? 18 April 2005 22:37:22

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Re: 78 Chevy 4x4 still bucking at 33-35 mph, help?

Trailblazer 4 April 2005 02:13:14
 suspension's factory rear leafs with 2 in. blocks, and replacement front
springs for 2 inches of lift all around. It has the dual shocks on the
front end, i replaced 2 of them a year or so ago, the other fronts seemed
ok, and i replaced the rear shocks about 2 months ago. All the bushings are
polyurethane and we greased them well before putting the lift on, which has
been on there about 2 1/2 years.

Thanks
TB

"Mud" <void@linux.site> wrote in message
news:p­an.2005.03.31­.05.06.02.87375@linu­x.site...> On Mon, 28 Mar 2005 13:23:00 -0600, Trailblazer wrote:>
I was able to try it in neutral today, it did the exact same thing. An
note, it gets worse the warmer the truck is. I live in northeast AL and> > today it's about 55 degrees and it didn't start until about 5-10 min of> > driving it. yesterday, it was about 65-70 degrees and it was worse the> > first time i drove it. I tried it in 4wd and 2wd back when i took out
rear driveshaft and drove it, it did the same thing, same vibration at
same speed. Gear wise, it's an automatic, and if you accelerate hard> > through that speed, it's not as noticeable,but it's still there.>
Well that pretty much eliminates the drive train. How about suspension?>
coldfire>


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peter benjamin via CarKB.com 5 April 2005 05:15:17 permanent link ]
 you might want to try looking at a misfire in the engine.I would start at
the egr valve-these usually give problems in high gear under light load-try
disconnecting vacuum line.


good luck

--
Message posted via http://www.carkb.co­m
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Lew Pratt 18 April 2005 22:37:22 permanent link ]
 My 84 K5 Blazer did the same thing as yours. I though it was the calipers
and asked a friend, he said it may be but might also be the brake lines. I
replaced my front calipers and then the lines. The bucking went away with
the replacement. My bucking would have shaken your teeth out of your head
dentures or not.


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CarGuru > 4 x 4 > Re: 78 Chevy 4x4 still bucking at 33-35 mph, help? 18 April 2005 22:37:22

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