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04-19-2016, 12:31 PM
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#1 |
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Registered User
Join Date: May 2014
Location: Mission BC
Posts: 452
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Got a vibration...at 55MPH
LS swapped 62, 4L60E one piece driveshaft, 2-1/2 drop spindles with 1 coil cut, 4 or 5" drop springs in the rear can't remember...I get a vibration at 55mph that goes away at 60mph...Truck is smooth (for a 54 year old truck) other than at this speed. All u-joints are new. Tranny shifts good. Could it be my driveshaft? Why would it not vibrate at other speeds? Thanks
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1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped |
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04-19-2016, 03:54 PM
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#2 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Got a vibration...at 55MPH
Pinion angles are the first thing I generally look at with vibrations. 5mph is a pretty narrow window, so its completely fine at 1-54 and then like 60-80?
If its the driveshaft, you can find an empty space of road and get up to 55, pop the truck in neutral and see if the vibration goes away. If its a wheel/tire/brake issue, it will persist. Might be a bit tricky if you only have a 5mph window, so just use caution.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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05-19-2016, 05:24 PM
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#3 |
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Registered User
Join Date: May 2014
Location: Mission BC
Posts: 452
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Re: Got a vibration...at 55MPH
Ok been busy these last few weeks:
Tried to pop it in neutral at 55 and shake is still there... Found a kinked brake line for passenger side disc that was not allowing passenger side calliper to open.-changed it. New front shocks as old ones were toast New rear shocks Front end seems to jump around right around 50-60 now. Smooths out a bit but not completely... Alignment? Truck has a 78 disc front end...
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1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped |
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05-19-2016, 10:49 PM
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#4 |
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*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: Got a vibration...at 55MPH
Front end jumps around? Sounds like tire balance to me. If they are the same size, swap them with the rears and see if front end gets better.
If you suspect alignment, that wouldn't hurt either, get it done. I'd also look for play in steering system, ball joints, etc. There could still be a driveshaft issue lurking here too. Been there, done that many times.
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Tom  Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
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05-20-2016, 11:04 AM
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#5 |
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Registered User
Join Date: May 2014
Location: Mission BC
Posts: 452
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Re: Got a vibration...at 55MPH
Dropped off the front tires at the tire shop today to see if that's the issue.
__________________
1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped |
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05-28-2016, 11:32 AM
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#6 |
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Registered User
Join Date: May 2014
Location: Mission BC
Posts: 452
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Re: Got a vibration...at 55MPH
Rally wheels are balanced but bent...apparently this is the cause of the vibration...they came with the truck so I don't know origin.
__________________
1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped |
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