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08-26-2014, 09:30 PM
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#1 |
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Registered User
Join Date: Aug 2012
Location: TRINITY NC
Posts: 51
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What happened??
OK,just completed,rear end swap and drop,1984 step,sb and long tail shaft 350, installed shackles and hangers,removed overload spring,dropped 4and1/2" and if it matters its a 2wd and i installed another 10and1/2 rear end .but it is a 6lug from the same year.installed new center bolts and new u-bolts.heres the problem my drive shaft is now too long.it is jambed into the trans.had to force it in rear yoke.its too long? the other thing is i replaced the rear shocks with new front shocks,read that would work,problem with shocks is they are too short,will not stretch to lower bracket?need some help,thanks in advance,you guys always come through
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08-26-2014, 09:39 PM
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#2 |
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Senior Member
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
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Re: What happened??
You dropped the truck, the rearend is now closer to the transmission. As you decrease the driveshaft angle you are also decreasing the distance from the rearend to the transmission. Most people probably don't see enough of a difference to worry about it but you probably had the perfect storm and have the right combo where you are seeing a problem.
__________________
Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. |
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08-26-2014, 09:39 PM
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#3 |
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Registered User
Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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Re: What happened??
well think man the rear end moves up and down and as it does the shaft gets longer or shorter and now you have shorten the over all leangh. also some rears has a longer poinon shaft then others and it sounds like yours is from a heavy half or something more heavy duty
__________________
1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car |
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08-26-2014, 09:54 PM
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#4 |
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Registered User
Join Date: Aug 2012
Location: TRINITY NC
Posts: 51
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Re: What happened??
so is a new drive shaft in order?
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08-26-2014, 09:55 PM
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#5 |
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Registered User
Join Date: Aug 2012
Location: TRINITY NC
Posts: 51
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Re: What happened??
and do i need to change angle? shims? thanks
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08-26-2014, 10:04 PM
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#6 |
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Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
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Re: What happened??
Are you trying to install the driveshaft with the weight off the wheels?
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08-26-2014, 10:31 PM
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#7 |
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Registered User
Join Date: Aug 2012
Location: TRINITY NC
Posts: 51
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Re: What happened??
no shes on the ground,but its just too short on ground or lifted,
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08-26-2014, 10:42 PM
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#8 |
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Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
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Re: What happened??
Sounds like driveshaft mod time.
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08-27-2014, 08:08 AM
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#9 | ||
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: What happened??
Quote:
Quote:
You are straightening the angles out, which is favorable in terms of vibration. You will just want them equal and in opposite directions when done. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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08-27-2014, 09:27 AM
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#10 |
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Registered User
Join Date: Aug 2012
Location: TRINITY NC
Posts: 51
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Re: What happened??
thanks guys,on the way to machine shop,drive shaft guy says may only need to shorten 7/8"? is that enough? also looks like I need shock extensions
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08-27-2014, 10:07 PM
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#11 |
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Senior Member
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
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Re: What happened??
I would do shock relocators before shock extensions. Have you corrected the shock angle yet?
__________________
Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. |
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