Chassisworks Fab9 Custom Rear End Worksheet Instructions

This rear end worksheet is designed to collect the information we need to build your rear end housing and/or order your custom axles. To order the correct housing for your vehicle, use our measuring methods and accurately fill in all requested information. No returns on custom housing or axles.

Before measuring your vehicle, it needs to be positioned. Raise the car off the shop floor and level it front to rear and right to left at the rocker panels. Removing the stock rear end housing and suspension is not necessary but will make measuring easier. Use a carpenter’s square to transfer the dimensions to the floor where it is easier to measure from point to point.

The following are descriptions of the lettered blanks.

“A” Width of the car from inside quarter panel lip to inside quarter panel lip.

“B” Outside width of frame rails. NOTE: When using a Chassisworks Eliminator II chassis or rear frame kit this is the outside width of the 4-link brackets.

“C” Distance from wheel mounting surface to inside tire sidewall.

/> “D” Overall width of tire mounted on the wheel from sidewall to sidewall.

“E” Pinion offset is the relationship of the pinion centerline to the centerline of the chassis. Available offsets to the passenger side are 0, 1/2”, 1”.

“F” Axle flange offset is the distance from the housing end to the axle flange. Refer to Chart “B” on page 5.

“G” Tire clearance from inside sidewall to frame rail. Should be 1” to 1-1/2” for a race car, or 1-1/2” to 2” for a street car.

source: http://www.cachassisworks.com/Attachments/worksheets/fab9_instructions.pdf