Adjustable pinion snubber

[middleagecrisis]

I have an adjustable pinion snubber on my 8.75 in my duster. What kind of clearance should I have between the snubber and the floor? The rear leaf springs have five leafs, so they’re pretty stout and I don’t think that wheel hop will be an issue. Obviously, I haven’t driven this car much since I got everything together.This is a street driven car.

 

[Vaanth]

From:

 

[RustyRatRod]

I had a friend (RIP) who had a wicked 440 4 speed Challenger back in the 70s and when he went to the track, he preloaded it against the floor. He also welded a piece of 1/4" plate to the floor so it wouldn't beat the snot out of the floor. So the answer is it depends on what you're doin.

 

[Oldiron440]

I’ve been into Mopars for over forty years and have had several ten second cars. I have never needed a pinion snubber, never. An Abody with the front springs clamped should be all that is required , the quickest 60’ time with SS springs and no pinion snubber is 1.39.

 

[Wvbuzzmaster]

To answer your question, based on your use being similar to mine (high performance street driven 99.5% of the time), with the adjustment holes on the snubber being spaced how they are… pick the adjustment hole that allows you around 3/4” clearance with weight on the suspension. Will it come in to play that way, not really, but it won’t give you weird feedback if you hit a bump that cycles the suspension.

I’m running 6 leaf 340 Heavy Duty Espo leafs out back with a 340 (284/484 cam), a 727, and 3.91 sure grip 8-3/4. I could probably yank the pinion snubber and not notice a difference.

 

[RustyRatRod]

I’ve been into Mopars for over forty years and have had several ten second cars. I have never needed a pinion snubber, never. An Abody with the front springs clamped should be all that is required , the quickest 60’ time with SS springs and no pinion snubber is 1.39.

I agree. Even the stock XHD springs won't really give enough on a street car to make the snubber work. The front segments are pretty stout.

 

[middleagecrisis]

Thank you everybody for the feedback. The adjustable pinion snubber came on an eight and three-quarter that I pulled out of a race car. I’ll probably remove it and place a stock piece back on.

 

[jbc426]

When properly adjusted according to the Race Bulletin above, the rear suspension essentially stops compressing except for the rear spring segment resulting in a very stiff ride. Brutal is probably a better word for it.

They are great for launching on a smooth track, but brutal on the open roads. CalTracs are much the same. I just can't take the rough ride they leave you with any more, and had to find other ways to plant the tires on launch.