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Pinion snubber instead of HD leaf springs? #2459345
03/01/18 12:29 PM
03/01/18 12:29 PM
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74RALLYE Offline OP
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74RALLYE  Offline OP
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Before I buy my 3rd drive shaft, I want to address the real problem. My 74 B body 440/4sp seems to have a lot of axel wrap during launches and hard shifts. Would an adjustable pinion snubber be a good option instead of stiffer leaf springs? Otherwise the factory springs ride well.

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459351
03/01/18 12:41 PM
03/01/18 12:41 PM
Joined: Sep 2003
Posts: 10,316
north of coder
moparx Offline
Dreaming of implants
moparx  Offline
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north of coder
i would try a cheap set of slapper bars before i would monkey around with a pinion snubber.
beer

Re: Pinion snubber instead of HD leaf springs? [Re: moparx] #2459358
03/01/18 12:57 PM
03/01/18 12:57 PM
Joined: Jun 2004
Posts: 2,504
St. Charles, MO
wingman Offline
Uncreative Title
Happy Birthday wingman  Offline
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St. Charles, MO
This has been discussed a lot over the years. IMO a pinion snubber or traction bars are a band-aid fix. The real issue is the springs.

Do you have the front of the spring pack clamped?

https://board.moparts.org/ubbthreads/ubbt...on-snubber.html

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459394
03/01/18 02:16 PM
03/01/18 02:16 PM
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Posts: 1,105
Tucson, AZ
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cruzin Offline
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Tucson, AZ
Have you checked your setup for the correct pinion angle at any time?

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459398
03/01/18 02:27 PM
03/01/18 02:27 PM
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So Near, Yet So Far
topside Offline
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So Near, Yet So Far
The front section of the spring controls wrap, the rear is more of the rate & ride quality. A 440/4speed should at least have the "XHD" (aka "Hemi") rear springs. Clamping the front segment in a couple places works even with slicks. If you don't get separation (springs driving tires down during launch), then the taller snubber will limit rotation of the axle, but it's the springs' ft section that should be addressed. On my drag car that does get a lot of separation the snubber did nothing and I don't run one on that car. It uses modified SS springs & clamped ft sections.

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459414
03/01/18 02:48 PM
03/01/18 02:48 PM
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Posts: 32,270
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Don't the 1973 or 1974 and later B body use different length and different mounting on the leaf springs than the pre 1973? If so as you have already discovered the leaf springs, non HD, don't work for what you want them to do shruggy The snubber can't fix the springs work
Buy the best springs you can get for what you want them to do up scope twocents

Last edited by Cab_Burge; 03/01/18 02:49 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459453
03/01/18 04:18 PM
03/01/18 04:18 PM
Joined: Jul 2011
Posts: 869
Chicago
PurpleBeeper Offline
super stock
PurpleBeeper  Offline
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Chicago
Topside's info is interesting. I don't run at the track (no roll bar), but I have SS springs, clamped in the front (3 clamps each side) and my pinion snubber hits the floorboard hard....hard enough that I bought one of those hemi pinion snubber reinforcement plates since I was ripping my floorboard.

In my limited experience, both pinion snubbers and slapper bars worked effectively, but I was mainly trying to prevent wheel hop.


70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"
Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459597
03/01/18 09:32 PM
03/01/18 09:32 PM
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Benton, IL.
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DaveRS23 Offline
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Benton, IL.
You didn't say if this was a street or track car. But, back in the 70s when we didn't have many choices and less information, we always used snubbers. Mostly to save the rear U-joints.

They did that job, but you had to have the snubber fairly close to the body in order for it to do it's job. And man, did the car ride rough like that.

And yes, the floor needed re-enforced at the point of contact.


KOS
Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459619
03/01/18 10:19 PM
03/01/18 10:19 PM
Joined: Nov 2006
Posts: 1,319
oklahoma
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forphorty Offline
pro stock
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oklahoma

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459671
03/01/18 11:45 PM
03/01/18 11:45 PM
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Posts: 7,103
Harrisburg, Pa.
screamindriver Offline
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Harrisburg, Pa.
Yes, if the stock isolators are tired they'd contribute to the axle wind up.. As already stated if the pinion angle at rest is off it too could leave the axle wrap up too far under load...I ended up cutting the iso axle perches off,welding the earlier style on the housing and adding super stock springs on the 73 RR...Problem solved,no adjustable snubber..

Re: Pinion snubber instead of HD leaf springs? [Re: topside] #2459674
03/01/18 11:50 PM
03/01/18 11:50 PM
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Posts: 5,687
Hamilton, Ontario Canada
Magnum Offline
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Magnum  Offline
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Hamilton, Ontario Canada
Originally Posted By topside
The front section of the spring controls wrap, .


This is the answer to your problem. You need a stronger front segment.

Here are a few reasons to avoid the other solutions:

Clamping springs takes away their ability to slide against each other. Without the slide, there will be a bind. If by chance there is enough action to force them to slide, they will not slide back. So the spring will have a memory, compress and the will not fully decompress. The car will not return to the original ride height.

Pinion snubbers. While they will stop the nose of the differential from rising. They will also stop any suspension travel. This was probably designed by the same engineer that gave us negative caster and ammeters in the dashboard.


69 Super Bee, 93 Mustang LX, 04 Allure Super
Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459700
03/02/18 12:39 AM
03/02/18 12:39 AM
Joined: Dec 2007
Posts: 11,343
Great Neck,LI,new york
hemi-itis Offline
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Great Neck,LI,new york
Been there,,,done that.Went with Cal traks and adjustable shocks with great results!


HEMI-ITIS has no cure. My condition is fully BLOWN!!!

New best 60ft,, 1.42,1/8, 6.0 @117,, 9.38 @146.75 with 6 lbs boost @3700 lbs
Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459729
03/02/18 01:11 AM
03/02/18 01:11 AM
Joined: Jan 2003
Posts: 1,607
A certified culture free zone.
74RALLYE Offline OP
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74RALLYE  Offline OP
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Joined: Jan 2003
Posts: 1,607
A certified culture free zone.
My pinion angle is ok and I'm not on the track or running sticky tires. I do have the iso-rubber rear leaf springs. From everyone's advice, it looks like my best option is to switch over to the '71 style springs and learn about spring clamping,
Insted of changing the spring perches, can't I just fab up Ann adaptor for the centering pin on the spring perch?

Re: Pinion snubber instead of HD leaf springs? [Re: 74RALLYE] #2459833
03/02/18 11:02 AM
03/02/18 11:02 AM
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Posts: 5,299
Caracas, Venezuela, SouthAmeri...
NachoRT74 Offline
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there is Poly spring isolator option... the best of both worlds

https://www.ebay.com/itm/Energy-Suspensi...yMAAOSwuHdaZfy7

if you are not to race... why sacrifice that and make all those changes. Just replace rubbers for poly, and done.

then, I'm agreed, extra leaf on the stock ones, and one more half leaf to the front

I'll be working on that. Although won't change to poly. I like the comfort features. My car got performance upgrades but still a street car.

Yes, The pinnion snubber is kinda harsh on a street car ( I have it )

I think its time to focus on the car useage. Why remove all the comfort features when is not really needed ? just because ppl keeps saying is a [censored] ? enjoy the car on the way it is, just upgrading some stuff for "better" handling doesn't require change all its parts and advantages. The parts for upgrades are available on the stock setups


Re: Pinion snubber instead of HD leaf springs? [Re: NachoRT74] #2460189
03/02/18 10:09 PM
03/02/18 10:09 PM
Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee Offline
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B5 Bee  Offline
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Pangaea
Springs should be designed to launch the car.

The snubber is a safety device in case the front spring segment allows too much wrap up, breaking the U-joint. It should not be set to hit, if possible.


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