bad wheel hopping - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gmc67swb · 10-10-2007, 05:33 PM

ok boys need a little help on this one....truck is a swb 67 gmc with leaf springs....7 leafs to each side so its stiff...The problem is it wheel hops,was wondering if i removed a couple of the leafs and softened it up if it would help.Have around 450hp and about 450 torque...rearend is a dana 44 with a posi.and traction bars...tremec tranny 5 speed...I know that a coil over is much better for this but was trying to get around doing the swap...any input would be great....thanks

71tahoe · 10-10-2007, 06:43 PM

I'm no expert but I don't think taking leaves out will help. You only have one leaf that connects to the shackle and a maybe a couple more banded to it. Axle wrap is probably the culprit. Traction bars may be the only option depending on your ground clearance.

http://www.suspensionconnection.com/...raction%20Bars

Longhorn Man · 10-10-2007, 09:29 PM

coil overs wouldn't do jack... unless you ment a coil spring rear suspention?
Traction bars, slapper bars, lift bars, ladder bars...
how much money you have to spend? How bad to you need to stop the wheel hop?

a1953mdl · 10-10-2007, 10:00 PM

You have traction bars, are they adjusted properly? Iirc you only want about 1/2" between the snubber and the leaf. Are the bars long enough to reach to the main leaf?
Alternative to changing to the coils, move the axle forward (redrill the spring perch) about a inch. That makes the front side shorter and stiffer and allow the back part of the spring to work (like old super stock springs). IMHO don't remove any leaves to reduce wheel hop.
Does it have the problem on both asphalt and concrete?
Might check to make sure every thing is tight on you rear end mounting points.
Just rattling on.... hope something helps.
Lee

wibilly · 10-10-2007, 10:53 PM

my shortened k 20 hops real bad too. i guess i should be fixen it instead of sitten here

Bob 68327 · 10-10-2007, 10:58 PM

On my old drag car I removed the spring retainer clip on the side behind the wheel and added them to the front side it helped the chassis load by letting the rear of the springs spread open . I have a leaf spring rear in mine but suffer no wheel hop!! Hope this helps. By the way do you know what spline the axels are in the 44 my rear is a 44 also. I need a posi. but don't know what spline the axels are !! Any help would be appreciated!!!

**Boog** · 10-10-2007, 11:02 PM

You may very well need to put some stiff shocks on it to help control the hop.

gmc67swb · 10-11-2007, 06:42 AM

Quote:

Originally Posted by Bob 68327

On my old drag car I removed the spring retainer clip on the side behind the wheel and added them to the front side it helped the chassis load by letting the rear of the springs spread open . I have a leaf spring rear in mine but suffer no wheel hop!! Hope this helps. By the way do you know what spline the axels are in the 44 my rear is a 44 also. I need a posi. but don't know what spline the axels are !! Any help would be appreciated!!!

There 28 spline...

gmc67swb · 10-11-2007, 06:51 AM

thanks for the input guys all is food for thought and longhorn thats what i meant change to a coil spring suspension...

gmc67swb · 10-11-2007, 06:58 AM

Quote:

Originally Posted by a1953mdl

You have traction bars, are they adjusted properly? Iirc you only want about 1/2" between the snubber and the leaf. Are the bars long enough to reach to the main leaf?
Alternative to changing to the coils, move the axle forward (redrill the spring perch) about a inch. That makes the front side shorter and stiffer and allow the back part of the spring to work (like old super stock springs). IMHO don't remove any leaves to reduce wheel hop.
Does it have the problem on both asphalt and concrete?
Might check to make sure every thing is tight on you rear end mounting points.
Just rattling on.... hope something helps.
Lee

sorry about that should have made it clearer....on street tires it will burn the tires off no wheel hop....(asphalt r concrete) its when i'm at the track with the M/T Sticky's on....

JAKES 68GMC · 10-11-2007, 05:16 PM

I've got bad wheelhop problems, too. Thats probably a good thing though.

gmc67swb · 10-12-2007, 07:40 PM

http://www.4x4wire.com/jeep/tech/susp/axlewrap/

<-------your son

s1lv3r · 10-12-2007, 07:50 PM

Quote:

Originally Posted by 71tahoe

I'm no expert but I don't think taking leaves out will help. You only have one leaf that connects to the shackle and a maybe a couple more banded to it. Axle wrap is probably the culprit. Traction bars may be the only option depending on your ground clearance.

http://www.suspensionconnection.com/...raction%20Bars

I see that they only list back to '73. Do they have any that'll fit the '67 gmc?

scatesracing · 10-13-2007, 03:51 PM

I helped a freind a while back... we took out the over load spring (the 3/4 in thick short spring on the bottom) and let the tires down.... get it to grab and stay hooked... the back lowered about an inch when we took out the spring....and road better to... it helped a ton... then he put an oooold set of slapper bars on it and then it was great just my $.02

Scott68-93-97 · 10-15-2007, 11:07 AM

something else you can do is extend your perches to contact more spring this will help a bit we do it on off road stuff a lot, or cut down an extra overload sping thats about 3 inches longer than the perch on each side and put that inbetween your perch and springs we did this on my yota and it almost completely stopped the wrap and hop even with 5.29 gears and dual tranfer cases

10-10-2007, 05:33 PM	#1
gmc67swb Registered User Join Date: Feb 2003 Location: Mesquite, Tx Posts: 396	bad wheel hopping ok boys need a little help on this one....truck is a swb 67 gmc with leaf springs....7 leafs to each side so its stiff...The problem is it wheel hops,was wondering if i removed a couple of the leafs and softened it up if it would help.Have around 450hp and about 450 torque...rearend is a dana 44 with a posi.and traction bars...tremec tranny 5 speed...I know that a coil over is much better for this but was trying to get around doing the swap...any input would be great....thanks __________________ GM 330HP/350, Magnuson 122HH, Tremec TKO 5spd

10-10-2007, 06:43 PM	#2
71tahoe Registered User Join Date: May 2006 Location: Jonesboro, AR Posts: 916	Re: bad wheel hopping I'm no expert but I don't think taking leaves out will help. You only have one leaf that connects to the shackle and a maybe a couple more banded to it. Axle wrap is probably the culprit. Traction bars may be the only option depending on your ground clearance. http://www.suspensionconnection.com/...raction%20Bars Last edited by 71tahoe; 10-10-2007 at 06:45 PM.

10-10-2007, 09:29 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: bad wheel hopping coil overs wouldn't do jack... unless you ment a coil spring rear suspention? Traction bars, slapper bars, lift bars, ladder bars... how much money you have to spend? How bad to you need to stop the wheel hop?

10-10-2007, 10:00 PM	#4
a1953mdl Rusty but Trusty Join Date: Jan 2007 Location: Texas Posts: 228	Re: bad wheel hopping You have traction bars, are they adjusted properly? Iirc you only want about 1/2" between the snubber and the leaf. Are the bars long enough to reach to the main leaf? Alternative to changing to the coils, move the axle forward (redrill the spring perch) about a inch. That makes the front side shorter and stiffer and allow the back part of the spring to work (like old super stock springs). IMHO don't remove any leaves to reduce wheel hop. Does it have the problem on both asphalt and concrete? Might check to make sure every thing is tight on you rear end mounting points. Just rattling on.... hope something helps. Lee __________________ 72 SWB, 454 / th400... hoping the kids don't get all the parts before it gets built

10-10-2007, 10:53 PM	#5
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: bad wheel hopping my shortened k 20 hops real bad too. i guess i should be fixen it instead of sitten here __________________ common sense isn't so common anymore

10-10-2007, 10:58 PM	#6
Bob 68327 72 Chevelle Club Join Date: Jun 2007 Location: Newton , Iowa Posts: 2,052	Re: bad wheel hopping On my old drag car I removed the spring retainer clip on the side behind the wheel and added them to the front side it helped the chassis load by letting the rear of the springs spread open . I have a leaf spring rear in mine but suffer no wheel hop!! Hope this helps. By the way do you know what spline the axels are in the 44 my rear is a 44 also. I need a posi. but don't know what spline the axels are !! Any help would be appreciated!!! __________________ I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker Last edited by Bob 68327; 10-10-2007 at 11:00 PM.

10-10-2007, 11:02 PM	#7
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,535	Re: bad wheel hopping You may very well need to put some stiff shocks on it to help control the hop. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

10-11-2007, 06:51 AM	#9
gmc67swb Registered User Join Date: Feb 2003 Location: Mesquite, Tx Posts: 396	Re: bad wheel hopping thanks for the input guys all is food for thought and longhorn thats what i meant change to a coil spring suspension... __________________ GM 330HP/350, Magnuson 122HH, Tremec TKO 5spd

10-11-2007, 05:16 PM	#11
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,211	Re: bad wheel hopping I've got bad wheelhop problems, too. Thats probably a good thing though.

10-12-2007, 07:40 PM	#12
gmc67swb Registered User Join Date: Feb 2003 Location: Mesquite, Tx Posts: 396	Re: bad wheel hopping http://www.4x4wire.com/jeep/tech/susp/axlewrap/ <-------your son __________________ GM 330HP/350, Magnuson 122HH, Tremec TKO 5spd Last edited by gmc67swb; 10-12-2007 at 07:43 PM.

10-13-2007, 03:51 PM	#14
scatesracing Machinist Join Date: Sep 2007 Location: Derby Kansas Posts: 296	Re: bad wheel hopping I helped a freind a while back... we took out the over load spring (the 3/4 in thick short spring on the bottom) and let the tires down.... get it to grab and stay hooked... the back lowered about an inch when we took out the spring....and road better to... it helped a ton... then he put an oooold set of slapper bars on it and then it was great just my $.02

10-15-2007, 11:07 AM	#15
Scott68-93-97 Registered User Join Date: Jul 2006 Location: Fair Oaks, CA Posts: 475	Re: bad wheel hopping something else you can do is extend your perches to contact more spring this will help a bit we do it on off road stuff a lot, or cut down an extra overload sping thats about 3 inches longer than the perch on each side and put that inbetween your perch and springs we did this on my yota and it almost completely stopped the wrap and hop even with 5.29 gears and dual tranfer cases __________________ 1968 Short Fleet 350/700r4 http://67-72chevytrucks.com/vboard/s...d.php?t=249435 1997 Bagged XtdCab Vortec350/4L60e http://67-72chevytrucks.com/vboard/s...44#post2286144 1993 XtdCab Longbed 4x4 6.5Turbo/NV4500 "Daily Driver" 1985 Toyota XtdCab 4x4 22re/W-56/Dual T-cases, Doug Thorley Header, Homebrew front and rear spring packs, Tons of Mods to suspension and drivetrain, 35" boggers, coming soon ARB's and 5.29's, Possible 4.3/700r4 swap Last edited by Scott68-93-97; 10-15-2007 at 11:09 AM.



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