mg CLASSIC CONVERSIONS v6 

      Classic Conversions Engineering

     

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webpage copywrited 2008

 

 

 

 

4-Link Rear Suspension Kit

 

 

4 Link Rear Suspension Kit

(50 lb lighter)

 NOTE:

a) If your B is a Rubber Bumper from 1974 ½ to 1980:

 Theses MGB’s have only one battery box and it is bigger by ½” and the driver side upper link will interfere with the battery box.

The battery box must be modified by per instructions below.

 b) For some non-MGB axles, the weld brackets will have to be ground to fit.

 c) The brake hose bracket will have to be relocated to clear the rod link.

 

 

   Classic Conversions Eng (CCE) 4 link rear suspension kit has the following components:

2 upper brackets, 2 lower brackets, 4 rod links, 8 stainless rod ends, 2 coil over shocks, 4 U bolts, 4 axle brackets and all of the hardware needed to complete installation.

   CCE 4 link rear suspension was designed to accomplish: easy 90% bolt-on installation, good ride, adjustability, traction and handling.

   This was accomplished by using the Satchell design. The Satchell design uses two angle links to secure the solid axle from side loads thus preventing side to side shifting. This design eliminates the need for a Panhard rod.

CCE design does not have any binding through the full travel of the rear suspension.

   CCE suspension can be adjusted for ride height in two different ways:

a) by bolting the coil over shock in the lower mounting hole, the suspension is lowered 1”.

b) by turning the coil over adjusting nut, the ride height can be adjusted to the desired ride height.

   Rear axle tracking can also be adjusted by adjusting the lower rods.  This should be accomplished during a 4-wheel alignment.

   Pinion angle can be adjusted by turning the upper rods until the desired pinion angle is achieved.

   Ride quality is accomplished by using the correct spring rate with the correct valving of the shock. One great advantage is the light weight of the CCE rear suspension.  This means less unsprung weight, which translates into good handling and good ride quality. Also the spring rate can be changed with ease.

 

INSTRUCTION MANUAL

VERY IMPORTANT:

 

READ THESE INSTRUCTIONS FIRST!

 

The following measurements MUST be taken before removing your leaf springs and related components.

Follow these instructions for ease of installation.

 

                                                    PRE-INSTALLATION

 

Important note please read

 

a) If your B is a Rubber Bumper from 1974 ½ to 1980.

 

This MGB’s, have only one battery box and it is bigger by ½” and the driver side upper link will interfere with the battery box.

The battery box can be modified by cutting the angle iron section of the battery box and move ½” or less and re weld. This will make the battery box smaller and a Group 26 battery must be used.

 

b) The Ford rear axle. The weld brackets will have to be ground to fit. The center section is off center and one of the brackets will have to be welded on top of the housing.

 

c) The brake hose bracket will have to be relocated to clear the rod link.

 

  1. Measure the ride height on both sides.  This measurement should be taken from the floor to the bottom of the chrome strip.  Log this information on the log sheet in this manual.

 

  1. Place the car on stands using all safety precautions as outlined in your MGB manual.

Place jack stands on the rear. 

Place the jack stand just in front of the front leaf spring.

Let the axle swing down as far as it will go with the axle straps connected.

 

  1. Disconnect the drive shaft and measure the pinion angle on the rear axle.   Log measurement on the sheet provided in this manual.

 

  1. Measure from the axle to the front spring perch.  This is where the leaf spring attaches to the frame.  This measurement must be taken on both sides.  Log this information on the log sheet in this manual.

 

  1. The following measurements should be in the log sheet.

 

    1. Ride height
    2. Pinion angle
    3. Axle distance measurement, both sides

 

  1. These measurements are very important.  They will help you to locate the axle as it was originally and save you time.


 

INSTALLATION

 

 

1.      Remove the shock absorber.  Save the two bolts on each side.

 

2.      Place the upper bracket with attached rod and axle brackets attached to the rod link and bolt in place using the two bolts on each side.  Place the links with the axle bracket on the axle and attached to the rod link.  Place them on the top of the axel.  Brackets hole should be 1“ off center of axle.  See picture.

                                                             

 

                                        ½”  to   1” max

 

Rear                                

 

 

 

Adjust upper rods to maintain the same pinion angle as your measurements on the log sheet.  Remove links and weld.

 

 

TIPS

If breather hole is covered by the welds, drill new hole.  Use lots of grease in the drill bit.  This will collect shavings.  Tap to 1/8” pipe.  Use grease on the tap to collect metal shavings.

Axle bracket may have to be trim ground to fit your particular axle.  Brackets can be welded to any axle.  Rod links have LH and RH threads; this will enable adjustability by just turning the rod link.

 

Breather tube can also be install in the top of the differential cover. Install breather hose and locate above the axle tube. Use a clamp to keep in place.

 

3.      Once the upper axel brackets are welded and links are secured, proceed to remove the leaf springs.  Keep the axle straps in place and place additional jack stands under the rear axle.  Use a floor jack to raise the axle when needed.  Save the bump brackets on the axle.

 

TIP

Tack weld the brackets on the axle, remove a steel bushing from the rode end and place it between the brackets and snug the bolt on the brackets. Do not tighten. This will avoid the brackets to close in during welding and it will facilitate the installation of the rod link.

 

4.      Install the lower brackets using the new “U” bolts and nuts.  Re-install the bump stop brackets.  Tighten “U” bolt nuts, torque to MG manual specs.

 

5.      Install the lower links in the middle hole of bracket as per your measurement in your log sheet.  The lower link end with aluminum spacers fits the front leaf spring hanger.  Use axel grease on new bolts.  Remove axle straps from the axle.

 

6.      Install coil-over shocks.  Spring adjuster should be just touching the spring without any pressure on the spring (as delivered).  Install shock on the top mounting hole on the bracket.  Re-install axle brackets.  Place the car on the ground and measure ride height.  Compare with measurement on log sheet.  If needed, lower the car an inch and place the shock on lower hole.

Lower rod links should be parallel to the ground as much as possible.  This can be accomplished by placing the lower link in one of the three holes in the bracket.

 

If too low, adjust the spring to desired height by turning the adjusting nut.  Car must be off the ground and axle strap removed to adjust springs.

Measure car ride height on both sides.

 

Any time that the springs will be adjusted, the weight and axle straps must be disconnected prior to attempt turn the coil over adjusting nut to raise the ride height. This will release the pressure on the spring.

 

 

WARNING

 

Classic Conversions 4-Link Competition Suspension is designed and manufactured without specific intent or purpose of application.  Application and suitability for a particular use are the responsibility of the purchaser.

 

The user or installer of this product must determine its suitability for their intended purpose or application. 

 

Technical information is believed to be accurate.  However, the use of this information and the suspension kit is at the risk of the buyer.  Classic Conversions and associated personnel are not responsible for mechanical damage or personal injury directly or indirectly resulting from the use of this product or technical information.

 

No part of this Four-Link Rear Suspension may be reproduced without the express permission of Classic Conversions.  Patent Pending.

 

 

 

 

 

 

 

RIDE HIGTH __________________________

 

 

PINION ANGLE________________________

 

 

AXLE DISTANCE DRIVER SIDE_______________

 

 

AXLE DISTANCE PASSENGER SIDE___________

 

 

NOTES:

 

 

For more information, click here for V8 Newsletter article by Curtis Jacobson.

 

  

Send email to Bill Guzman at bg.gtv6@verizon.net for all Classic Conversions inquiries.
Last modified: 09/26/2009