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regarding the service or installation of your Hotchkis products.
W arning: This installation should be perform ed by a trained professional.
1. First, raise the rear of the vehicle so that the rear wheels are off the ground. If you are using a 2-post lift,
support the differential with a hydraulic tranny jack.
2. Remove the rear shocks.
3. Remove the rear sway bar from the lower trailing arms.
4. Allow the differential to droop as far down as possible.
5. Remove the stock upper trailing arms.
6. As an initial starting point, set the Hotchkis trailing arms to the same length (hole to hole) as the stock
pieces. Do not fully tighten the jam nuts yet.
7. Reinstall the Hotchkis trailing arms in the same manner as stock removal.
8. Continue to the next section "Setting Pinion Angle"
78-88 GM A/G-BODY
Double Adjustable Trailing Arms
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INSTALLATION INSTRUCTIONS
1201AA
www.hotchkis.net
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Summary of Contents for Hotchkis 1201AA
- Page 1 4. Allow the differential to droop as far down as possible. 5. Remove the stock upper trailing arms. 6. As an initial starting point, set the Hotchkis trailing arms to the same length (hole to hole) as the stock pieces. Do not fully tighten the jam nuts yet.
- Page 2 U-joint wear will occur. The Hotchkis double adjustable trailing arms allow you to adjust the pinion angle with ease. Simply loosen the two jam nuts and rotate the aluminum turnbuckle to lengthen or shorten the arm. So, how does one set the...
- Page 3 This angle needs to be the same as the recorded crank angle. Adjust your Hotchkis trailing arms to obtain the angle needed. Tighten all hardware and drive the car. Test for driveline vibration by accelerating.
- Page 4 If there is vibration during braking, then the pinion angle is set too low! Fine tune your Hotchkis trailing arms to achieve the perfect setting for your driving style and horsepower.
- Page 5 Limited Warranty Hotchkis Performance offers a Limited Warranty against defects in materials and workmanship for the term of 36 months (3 years) from the date of purchase of this product. This Warranty only applies to the original retail purchaser who retains ownership of the vehicle on which the product was originally installed.
- Page 6 If the warranty claim is deemed valid then Hotchkis will estimate shipping costs to return the repaired or replacement part and contact you for payment. Hotchkis’s Limited warranty requires that any repaired or replaced product will be returned to the sender excluding the cost of freight.
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Page 7: Installation Instructions
8) Clean the frame at the trailing arm pivot area with a wire brush. Installation of HP Lower Trailing Arms Hotchkis performance trailing arms are fully assembled, greased and ready to install. 1) Apply a thin layer of chassis grease to faces of bushings before installation. - Page 8 9) Place one drop of blue Loctite on clean threads and torque sway bar nuts to 35 ft./lbs. Note: Loctite not needed if using new Hotchkis Performance hardware. 10) The holes located on the Hotchkis Performance lower control arms are for the mounting of our sway bar. Lower Trailing Arm...
- Page 9 30 days will be subject to a 20% restocking charge. If you purchased your Hotchkis Performance product from an authorized dealer, you are still covered by this return policy. All returns however, should be made to your dealer, not to Hotchkis Performance directly.
- Page 10 Technical Information Hotchkis Performance makes every effort to ensure that you are provided with the most accurate and up-to-date technical information. However, all technical information is approximate and may vary upon application.
- Page 11 8633 Sorensen Avenue SANTA FE SPRINGS, CA 90670 Hotchkis Performance will not accept product returns without the RGA number, receipt and the information described above. C.O.D. or collect shipments will be refused. Once the returns are received at Hotchkis Performance, we will evaluate the products, verify the sales receipt, and investigate the warranty claim.
- Page 12 1402 – 68-72 GM A-BODY 1403 – 64-67 GM A-BODY Thank you for your purchase. Please call us at (562) 907-7757 if you have any questions regarding your Hotchkis Performance products. Visit us online @ www.hotchkis.net INSTALLATION OF HOTCHKIS PERFORMANCE...
- Page 13 Using the jack placed under the differential, raise the rear suspension to its approximate ride height. The braces are generally easier to install with the rear axle at its normal ride height position to the frame. NOTE : Be careful not to unload the weight of car off the jack stands. To keep the axle from rotating, install one brace at a time.
- Page 14 The brace can now be installed by sliding it over the bolts. The braces connect the upper and lower trailing arm frame mounts as indicated by the arrows in the photo from step 7. The longer section of the brace fits next to the lower trailing arm. NOTE : For 78-88 models (part #1401) the curved section fits next to the lower trailing arm between the rear seat pan and the frame cross-member as shown in the photos below.
- Page 15 Adjust the length of the brace as necessary. Loosen the jamb nut on the brace with 15/16” wrench to allow the head to move. Rotate the head clockwise to shorten the brace or counter- clockwise to lengthen the brace until it fits over the ends of the bolts. The brace ends should fit almost flush to the frame with the bolts fully extended through the ends.
- Page 16 Once the braces are installed, place one drop of Loctite on the trailing arm bolt threads. Tighten the washers and nuts. Torque the nuts to 60 ft./lbs . You may have to use a wrench and socket together to keep the hardware from spinning. NOTE : If using rubber trailing arm bushings, then raise the differential to approximate ride height and tighten the trailing arm bolts.
- Page 17 IMPORTANT: This warranty supersedes all other warranties included with this product. Return Policy We want you to be completely satisfied with your Hotchkis Performance product. For products, presenting signs of shipping damage please contact the freight carrier immediately. All our products are guaranteed to be free from manufacturer’s defects.
- Page 18 Technical Information Hotchkis Performance makes every effort to ensure that you are provided with the most accurate and up- to-date technical information. However, all technical information is approximate and may vary upon application.
- Page 19 Hotchkis Performance will not accept product returns without the RGA number, receipt and the information described above. C.O.D. or collect shipments will be refused. Once the returns are received at Hotchkis Performance, we will evaluate the products, verify the sales receipt, and investigate the warranty claim.
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