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13906-C Denton Drive
Farmers Branch, TX 75234

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Duntov Motor Company

The following Special Tools are all but REQUIRED to do a proper job:

Spindle Knocker (spindle removal tool)
This threads onto your old spindle and protects the threads while you beat on it to break it free from the housing. Even though you may be planning on replacing the old spindle, if you beat on the spindle without the tool, you will very likely mushroom it to the point where you can’t slide the bearings off the end.

Spindle Set-Up Tool
This allows you to slide the bearings on a mandrel instead of the spindle itself to check the endplay of the assembly. The final installed endplay must be between 1 and 8 thousandths. The old shim will only be correct if you are very lucky. Chances are you will have to try one, measure the endplay with a dial indicator, then figure the correct shim and try it again. If you use the spindle as the mandrel for these tests, you would have to do it through the installed pre-greased outer bearing and seal. It’s much preferable to check it dry before installing anything permanently.

Spindle Installation Tool
This tool threads onto the new spindle and allows you to torque the spindle into place. The problem is the outer bearing has to be greased and placed in its race before the grease seal is installed. The spindle then has to be pulled through the outer bearing, and the bearing will have to slide onto the thick shoulder of the spindle where it rides. The installation tool makes this a snap. Without the proper tools, this is tougher.

Assuming you have the right tools, the following is the proper sequence. Without the right tools, you will have to follow along and improvise. The tools are available from Mid America new for about $185 including freight, or you can rent a perfect used set from us for $198 (freight free), use it and return the still perfect used set for a refund of $120. I will also refund $1 for every unused new spindle shim you return.

Lets Begin:

1
The day before you get started, put the car on jack stands, remove the rear wheels and hose down everything you are going to take apart with Liquid Wrench.
2
Remove the rear brake caliper and place a socket between the pads to position them properly. You don’t want to have to bleed the brakes when all this is over!
3
Remove the rotor. If it is riveted to the spindle, the rivets have to go.
4
Separate the halfshaft flange from the spindle flange.
5
Remove the cotter pin from the spindle castle nut. Often you have to drill it out.
6
Using a 1-1/16th inch socket, remove the castle nut from the spindle.
7
Remove the washer and pull the spindle flange off the spindle.
8
Screw on the Spindle Knocker all the way on and hit it squarely and sharply until the spindle lets go. You may have to beat the hell out of it.
9
Using a long punch, tap the bearing races out of the bearing support housing.
10
First clean the grease out of the bearing support housing with a rag, and then scrub it thoroughly with Brake Clean. It can’t be too clean.
11
Assuming you are not reusing the old spindle, you can just set it aside. Removing the old bearing from the shoulder of the spindle is a problem you don’t have to deal with now.
12
Install the new bearing races. Be careful not to deface the bearing surface! Make sure they are ‘home’; nestled all the way into the housing to the stop.
13
Using the Spindle Set Up Tool, place the outer bearing on it all the way onto the shoulder. Stack the spacer and the thickest shim you have onto the mandrel and place it into the housing from the outside. From the inside, place the inner bearing on the tool, and using the thick spindle washer and the nut and sleeve from the installation tool, torque to 100 Ft. Lbs.
14
Measure the endplay with a dial indicator. If you used a .145 shim and the endplay is 17 thousandths, you know that if you replace that .145 shim with a .133 shim your endplay will be 5 thousandths. Remember, the minimum endplay according to GM is .001, the maximum .008. You are better off to be on the tight end of that spec, as in .001 - .004.
15
Repeat the process with the correct spacer and confirm the correct endplay. Its time to pack the bearings. Use a high quality Moly-Graphite grease rated for Extreme Pressure, or better yet, do as we do and use Mobil 1. Pack the bearings by hand and pack the housing with a lot of grease. It doesn’t have to be absolutely full, because the spindle is going to take up some room in there, but it needs to be completely full when you are finished. You don’t ever want to do this job on this car again.
16
Now the tricky part. Put the outer bearing onto its race and install the outer grease seal. Insert the spindle from the outside through the grease seal and the outer bearing, and then from the inside slide on the spacer, the correct shim, the inner bearing and install the inner grease seal.
17
Slide the spindle flange onto the spindle flutes and screw the Spindle Installation Tool on to the end of the spindle. By tightening the nut on the end of the tool, you will draw the spindle into place and into the outer bearing. Torque to 125 FT LBS and make sure the spindle is properly seated. When properly seated, the gap between the spindle and the head of the ¾ inch bolt head that is at the top of the parking brake assembly should be about 300 thousandths, plus or minus. You will notice when more torque yields no more spindle movement.
18
Remove the Spindle Installation Tool and place the washer with the concave side down and thread the nut on the end of the spindle. Torque to 100 FT LBS.
19
Check the endplay again by hand. It will probably be 1 thousandths less than you had with the set up tool if you did everything correctly, and that will be just fine!
20
Put the cotter pin through the castle nut and bolt everything back together.
21
Check the runout on the rotor with your dial indicator. There are 5 possible positions of the rotor on the spindle, and you should pick the one with the least total runout.
22
Ship your spindle tools back to us, along with all your unused shims for a credit of $100 plus $1 per shim.

Congratulations, you are now a qualified Corvette mechanic!

 

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Duntov Motor Company is the exclusive licensee for the continued production of the authentic original Corvette Grand Sport.  Duntov Motor Company is the exclusive licensee for the manufacturing and distribution of the updated street version of this famous car. We service what we sell. We also restore and service 1963-1982 Corvette race, street and performance cars using original and replacement parts including front and rear suspension, brake calipers, brake rotors, brake pads, both J-56 and stock brake caliper pistons, and Corvette stainless steel parking brake parts. We offer the finest original U.S. built Corvette spindles and GM stub axles, along with remanufactured Corvette differentials for both street and race cars. We build both new and rebuilt Corvette trailing arm assemblies for 1965-1982 Corvettes, and offer Corvette street and racing springs and both steel and composite leaf springs in a wide selection of spring rates. Check out our Corvette parts section for shocks, sway bars, upper and lower A-arms, Corvette ball joints, tie rod ends, pitman arms, idler arms, shocks and U-joints.

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