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Wheel Hop #2838956
10/29/20 06:27 PM
10/29/20 06:27 PM
Joined: Jun 2004
Posts: 875
Elizabethtown, KY
6T9Hemi Offline OP
super stock
6T9Hemi  Offline OP
super stock

Joined: Jun 2004
Posts: 875
Elizabethtown, KY
What is the best way to cure wheel hop on a 69 340 swinger. There is a stock pinion snubber on the differential (sure-grip)


1969 Hemi Road Runner Torqueflite 4:10 Dana60

Re: Wheel Hop [Re: 6T9Hemi] #2838970
10/29/20 07:12 PM
10/29/20 07:12 PM
Joined: Jan 2003
Posts: 9,956
Omaha Ne
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TJP Offline
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Omaha Ne
A copy of the old direct connection rear suspension manual will do the job. I'm sure others will chime in with their recommendations, but the beauty of the mod's in the manual were pretty much unnoticeable which = $$ while street racing back in the day. Worked well at the strip as well, especially with slicks wink

Re: Wheel Hop [Re: 6T9Hemi] #2838987
10/29/20 07:44 PM
10/29/20 07:44 PM
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Posts: 6,076
Benton, IL.
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DaveRS23 Offline
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The best way to stop wheel hop on a Mopar is to find the problem. Your car was not prone to wheel hop when new and everything in good shape. In fact, Mopar went to some lengths to prevent wheel hop by the very design of the leaf spring location unlike any of their competitors. You can start adding aftermarket parts or you can get to the root of the real problem. But that probably cannot be done on the computer. You will likely need someone who knows a bit about Mopar rear suspension to diagnose your problem.


KOS
Re: Wheel Hop [Re: 6T9Hemi] #2838988
10/29/20 07:44 PM
10/29/20 07:44 PM
Joined: Aug 2003
Posts: 35,936
Bend,OR USA
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Cab_Burge Offline
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Better set of new Hi Po rear leaf springs up scope
Sounds like you have the original 5 leaf 318 or smaller motor springs on the car, yes?
Even if they are the original 6 and 7 leaf factory H.D. springs they are how old? work grin
Buy new good ones up wrench twocents


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Wheel Hop [Re: Cab_Burge] #2838999
10/29/20 07:59 PM
10/29/20 07:59 PM
Joined: Jan 2003
Posts: 15,745
So Near, Yet So Far
topside Online content
I Live Here
topside  Online Content
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So Near, Yet So Far
As already stated, wheel hop wasn't much of a problem on Mopars, especially the HP models.
That said, springs, bushings & shocks do wear out; the only good 50-year-old springs I've had were the B-body XHD "Hemi" springs.
The rest all settled quite flat, even my early B cars.
Under what conditions, what power level, etc are you experiencing this ?
I'm not sure how cheaply you want to address it, but you could start by clamping the forward leaves.

Re: Wheel Hop [Re: topside] #2839222
10/30/20 10:20 AM
10/30/20 10:20 AM
Joined: Jun 2004
Posts: 875
Elizabethtown, KY
6T9Hemi Offline OP
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Elizabethtown, KY
Originally Posted by topside
As already stated, wheel hop wasn't much of a problem on Mopars, especially the HP models.
That said, springs, bushings & shocks do wear out; the only good 50-year-old springs I've had were the B-body XHD "Hemi" springs.
The rest all settled quite flat, even my early B cars.
Under what conditions, what power level, etc are you experiencing this ?
I'm not sure how cheaply you want to address it, but you could start by clamping the forward leaves.
The car does have the original 6 leaf springs on it and they look pretty flat. What would be the best replacement springs to get closest the the originals.


1969 Hemi Road Runner Torqueflite 4:10 Dana60

Re: Wheel Hop [Re: 6T9Hemi] #2839262
10/30/20 11:39 AM
10/30/20 11:39 AM
Joined: Jan 2003
Posts: 15,745
So Near, Yet So Far
topside Online content
I Live Here
topside  Online Content
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So Near, Yet So Far
Springs &Things, aka ESPO, is one source if you don't have a local good spring shop.
I've been happy with them on a couple cars, got + 1".
They can make them stock, + 1", + 2" if desired.
On another car, I cannibalized a pair of SS springs I had laying around, and mixed together they worked fine.

Re: Wheel Hop [Re: 6T9Hemi] #2839264
10/30/20 11:46 AM
10/30/20 11:46 AM
Joined: Sep 2003
Posts: 13,523
north of coder
moparx Offline
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north of coder
"most" springs were designed to be almost "flat" at ride height.
there are a bunch of ways to fix your problem, depending on how much money you are willing, or wanting, to spend.
over the 50 years i have been working on these things, the first item i check are the spring and shock bushings.
after that, i have found if you have a spare set of springs laying around or can find a set someone has replaced cheap, chop the eyes off of the main leaf, and install that leaf under your original main leaf.
then clamp the forward leaves together. use bought or home made clamps as you see fit.
the ride is not adversely affected, and wheel hop disappears.
just one way i have done it on the cheap, but keep in mind, i NEVER throw anything away, plus i have tons of shop tools here at my disposal.
your mileage will vary, depending on your stash of "stuff" and your tool kit.
beer

Re: Wheel Hop [Re: 6T9Hemi] #2839353
10/30/20 03:03 PM
10/30/20 03:03 PM
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Posts: 35,936
Bend,OR USA
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Cab_Burge Offline
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Try calling Greg at Tri City Competition in SO CA for a good set of H.D. leaf springs up scope
His shop is near Carlsbad, CA, not in Carlsbad. Sorry for not having a phone number for his shop blush
His Son has his old shop in Michigan, it is on the internet under Tri City Competition, maybe he can help you also scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Wheel Hop [Re: Cab_Burge] #2839388
10/30/20 04:32 PM
10/30/20 04:32 PM
Joined: Mar 2006
Posts: 8,225
MI, usa
dvw Offline
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MI, usa
My Ebody has the factory 340 suspension with front and rear sway bars, decent gas shocks. It’s a 4 Speed. When you really get after it there was some hop. An extended pinion snubber cured it. Even dumping the clutch at 5000 with slicks. State of the art, nope. But it doesn’t hop anymore.
Doug

Re: Wheel Hop [Re: dvw] #2840146
11/01/20 12:17 PM
11/01/20 12:17 PM
Joined: Jan 2003
Posts: 9,956
Omaha Ne
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TJP Offline
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Omaha Ne
An adjustable snubber will definitely help and possibly even stop it all together. But there was a lot more involved in getting the car to "plant" the tires. That is where the rear suspension manual would come in. if you're just trying to eliminate the wheel hop, start with the adjustable snubber wink

Re: Wheel Hop [Re: TJP] #2840348
11/01/20 06:05 PM
11/01/20 06:05 PM
Joined: Jan 2003
Posts: 130
Winter Park, Florida
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classracer Offline
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Winter Park, Florida
[Greg Luniak in Calif. 760-630-9094


70 Challenger A/SA 2441
Re: Wheel Hop [Re: classracer] #2840361
11/01/20 06:51 PM
11/01/20 06:51 PM
Joined: Dec 2004
Posts: 9,923
Rittman Ohio
fourgearsavoy Offline
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Rittman Ohio
Now I would start with a shock update to a basic single adjustable like the Rancho RS9000 series. They have a pretty stiff rebound that will keep the tire planted twocents
Gus beer


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: Wheel Hop [Re: fourgearsavoy] #2840491
11/02/20 03:25 AM
11/02/20 03:25 AM
Joined: Mar 2011
Posts: 1,469
Cut and Shoot, TX
kentj340 Offline
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Cut and Shoot, TX
When my '69 Barracuda 340 was about 4 or 5 years old, wheel hop started on aggressive acceleration, so I took it to a spring shop, and they installed an additional leaf, 2nd layer, making 7 each side. Problem solved, and as a bonus it raised the rear an inch or two which I thought improved the stance and looks. The springs are still working as intended, no hop.

My recommendation is to add a 2-1/2" wide leaf to each side that is 54-1/2" long with center hole 19-1/2 from the front end and see if that fixes the wheel hop. This could be relatively fast, cheap, and easy. I believe my extra leaves probably came from a junk yard, because they were hand cut to length by torch. Photo shows the extra leaf in 2nd layer.

17 Rear Springs.R5.JPG

If you don't see two dolphins, you need a vacation.






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