wheel hop in reverse - The 1947 - Present Chevrolet & GMC Truck Message Board Network

suede71 · 07-19-2003, 10:21 AM

Hi.
I am getting excessive wheel hop while backing up in reverse. Could this be a pinion angle problem? I have the two piece drive shaft and my truck is lowered 7 in rear and only 4 in front. If front is slightly higher than rear could this cause pinion probs. The rear is lowered by 5 inch coils and 2 inch blocks. Shocks are at correct angle.

Any ideas???

Thanks,

Tristen

*Shane* · 07-19-2003, 10:54 AM

Its because when you are going in reverse, the motion of the rear wheels try to "unwind" the springs. Tthe springs are wound so that their force is being used when going forward (the motion of the truck moving forward compresses the springs) and when you go in reverse, the motion of the truck tries to "unwind" the springs. Once the weight of the truck is lightened or taken off the springs, they tend to bounce.

sgtjed · 07-19-2003, 12:31 PM

um why in reverse?

phantom dually · 07-19-2003, 10:44 PM

My exact question!! WHY REVERSE

krue · 07-19-2003, 11:19 PM

My understanding is that when you are going forward the torque on the trailing arms (which are connected roughly in the middle of the truck) pull the weight of the truck onto the tires giving you traction, but in reverse it will push the weight of the truck up, therefore wheel hop.

I could be wrong tho!

houston6 · 07-20-2003, 03:37 AM

I had the same problem once.i went with a one peice driveshaft and it solved my problem.

*Shane* · 07-20-2003, 12:01 PM

weight transfer ... thats why it does it in reverse and not forward. When moving forward, the weight attempts to transfer to the rear of the truck ... thus pushing down on the rear and compressing the springs. When going in reverse, the weight tries to transfer to the front of the vehicle which "uncompresses" the springs ...

07-19-2003, 10:21 AM	#1
suede71 Registered User Join Date: Jun 2003 Location: Boxford, MA Posts: 50	wheel hop in reverse Hi. I am getting excessive wheel hop while backing up in reverse. Could this be a pinion angle problem? I have the two piece drive shaft and my truck is lowered 7 in rear and only 4 in front. If front is slightly higher than rear could this cause pinion probs. The rear is lowered by 5 inch coils and 2 inch blocks. Shocks are at correct angle. Any ideas??? Thanks, Tristen

07-19-2003, 12:31 PM	#3
sgtjed What if? Join Date: Oct 2002 Location: Choctaw,Oklahoma Posts: 649	um why in reverse? __________________ 2002 red extended cab Silverado 2002 Wheatland yellow Suburban

07-19-2003, 10:44 PM	#4
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	My exact question!! WHY REVERSE __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

07-19-2003, 11:19 PM	#5
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	My understanding is that when you are going forward the torque on the trailing arms (which are connected roughly in the middle of the truck) pull the weight of the truck onto the tires giving you traction, but in reverse it will push the weight of the truck up, therefore wheel hop. I could be wrong tho! __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-20-2003, 03:37 AM	#6
houston6 Registered User Join Date: May 2003 Location: north wilkesboro nc Posts: 221	I had the same problem once.i went with a one peice driveshaft and it solved my problem. __________________ Scott

07-19-2003, 10:54 AM	#2
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Its because when you are going in reverse, the motion of the rear wheels try to "unwind" the springs. Tthe springs are wound so that their force is being used when going forward (the motion of the truck moving forward compresses the springs) and when you go in reverse, the motion of the truck tries to "unwind" the springs. Once the weight of the truck is lightened or taken off the springs, they tend to bounce.

07-20-2003, 12:01 PM	#7
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	weight transfer ... thats why it does it in reverse and not forward. When moving forward, the weight attempts to transfer to the rear of the truck ... thus pushing down on the rear and compressing the springs. When going in reverse, the weight tries to transfer to the front of the vehicle which "uncompresses" the springs ...



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