Product Code: 70/30

Duff 70/30 Auto Adjusting Shock Absorber

From: $59.95

(14 customer reviews)

Sold Individually.

70/30 Auto Adjust Shocks We’ve designed suspension systems for Fords for years, looking to fine-tune them even further, we custom-designedour own automatically adjusting shocks that ride softer specifically for dual applications.

  • 30% Compression, 70% Rebound
  • Multi-Viscosity, All-Weather Fluid
  • Internal Urethane Bumpstop
  • 1 3/8″ High-Temperature Iron Piston
  • 5/8″ Hardened, Chromed Piston Rod
  • Double Welded Ends
  • 10 Stage Auto Adjust
  • Twin-Tube Construction
  • Foam Cell in a 2 3/8″ Reserve Tube
  • Corrosion Resistant Baked White Finish
  • Black Polyurethane End Bushings

Note: If you have a ’66 with the stock rear stud mount shocks, you would purchase our #8111 for 2.5″ to 3.5″ suspension lifts. We highly recommend upgrading to either a #5500, #5215 or #5214 for maximum travel and performance.

The 8111 is a stud mount top, eye mount bottom shock that has 7.5″ Travel with a collapsed length of 13.5″ and extended measurement of 21″

The 8110 is an eye to eye mount shock has 9.25″ Travel with a collapsed length of 15″ and extended measurement of 24.25″

The 8115 is an eye to eye mount shock has 10.25″ Travel with a collapsed length of 16″ and extended of 26.25″

The 8114 is an eye to eye mount shock has 11.94″ Travel with a collapsed length of 17.3″ and extended of 29.25″

Our 8120 is an eye to eye mount shock has 15″ Travel with a collapsed length of 20.5″ and extended 35.5″, this is the longest shock available in this style.

Please Note: If you are ordering shocks by themselves you will be required to fill out this form and submit the answers to our sales team to finalize and process your order.

NOTE: This shock is not gas charged. It is a hydraulic absorber that will not move unless an external force is applied to it.

Weight 7 lbs
Dimensions 20 × 3 × 3 in
Choose Travel Length

Eye To Eye 9.25" (8110), Stud to Eye 7.5" (8111), Eye to Eye 10.25"(8115), Eye To Eye 11.94" (8114), Eye to Eye 15" (8120)

Choose Mounting Postion

Front, Rear, James Duff Long Arm

14 reviews for Duff 70/30 Auto Adjusting Shock Absorber

  1. crazi429 (verified owner)

    Been running these on rear for a few year now have them on the front and they work great.

  2. John Newton (verified owner)

    i just replaced my Duff 70/30 shock which i purchased in 1997 with new Duff 70/30 shocks they have held up great and this is why I repurchased the same shocks. The ride is great with the old and even better with the new ones

  3. Larry Curtis (verified owner)

    Used them before my ride burnt and was happy with them, I ordered 4 replacements.

  4. Marshall (verified owner)

    Love these shock. Night and day difference from my Ranchos to these. Hard to beat these for the money.

  5. Chase

    went From eight 8110’s to eight 8115’s on all four corners after them being recommended based on my measurements. They fit perfectly and handled great when testing hard. The best shocks for the money with out a doubt and correct valving for my 8 shock set up. Stayed with The 70/30 shocks since my last set lasted for 22+ years.

  6. Paul Eikel

    Very satisfied with our recent purchase. As always very high quality parts that fit correctly. We will continue to purchase from James Duff.

  7. Eduardo Madera

    I’m very pleased with the 8114 shocks, they perform amazingly on and off road!!! I tested them hard and they performed perfectly and are working perfectly. I really recommend James Duff parts.

  8. David

    First time I have dealt with James Duff. Very good experience. Had the parts in stock and shipped right away. Have not received them yet however I’m looking forward to my package and getting the parts installed. Thank you from Ontario Canada Dave

  9. Sebastien Benoit

    Great product fit perfectly for what I was looking for. Good length and a rather impressive looking shock as well. Everything seems to be workin as it should.

  10. William Ryan

    I was unsure I had picked out the correct shock for my application and made a call to to them. They took the time to make sure I had proper measurements to get the correct shock. Great customer service and knowledge I’m very pleased with the james duff staff and highly recommended to everyone.

  11. Paul Brannon

    Thanks to your guys, they called for shipping and asked about my shock selection. So we got my shock selection changed to what I needed for my setup. Great service from your guys.

  12. Robert Simard

    I ship everyday . Your cost is crazy.

  13. Mike Strukel

    As with every order to my friends at James Duff, this was no exception. I added these shocks to by 76 Bronco crawler build this week. I have run them on my street bronco for years and they are great shocks. I expect these to work well in this application too.

  14. randy collecchi

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