FAQ
- What is the correct way to measure my bolt circle for my wheels?
- What gear oil do I use?
- How can I determine if my axles can be cut and resplined?
- Is a C-Clip axle race legal?
- Can I reuse my stock GM drum brakes with a press-on axle bearing?
- Can I use c-clip eliminators for street use?
- What do you need if I want to have a housing narrowed?
What is the correct way to measure my bolt circle for my wheels?
It depends on the stud count of your bolt circle. If it is a 4 or 6 lug then you measure from the center of the 12 o’clock position stud to the center of the 6 o’clock position stud. This will give you your bolt circle. If it is a 5 lug then a little math is involved. The simplest way is to measure from the center of the 1st stud skipping the 2nd stud and going to the center of the 3rd. You will then add a 1/4 inch to this and it will give you the bolt pattern. For example if the 1st to 3rd length going center of stud to center of stud is 4 1/2 inches you would then add 1/4 inch to this for 4.5 + .25 = 4.75 or 4 3/4 Chevy pattern. A typlical Ford 5 lug would measure 1st to 3rd at 4.25 inches so 4.25+.25= 4.5 or 4 1/2 Ford pattern. Measuring center of 1st to outside of 3rd doesn’t always work especially with a larger stud diameter like 5/8″ studs.
The limited – slip differential design has been extensively tested with high quality NON-Synthetic 80W90 hypoid oils ( regular mineral based oil ) treated with GM or Ford friction additives ( 3 oz. of additive will treat 1 quart of oil ).To avoid differential clutch chatter ( noise ) and for optimum performance, use the oil and additive described above. Use of other additive and oil types may cause differential clutch chatter.
Ford Friction Additive # C8A219B546A
GM Friction Additive # 1052358
How can I determine if my axles can be cut and resplined?
A. The axle shaft has to be the same size or bigger as the original spline OD where you need it cut.(They can NOT be smaller )
B. On the original axles you need to be taking off at least 3 1/2″ to get past the original spline area.
No a C-Clip axle is not a race legal axle.
Can I reuse my stock GM drum brakes with a press-on axle bearing?
A. To reuse your stock drum brakes, you can use are GM 10/12 Bolt Housings Ends for press-on axle bearings like the 7900 Moser housing ends.
B. They are made to work with a big ford axle bearing that uses a 3.150 OD .
C. You have to open up the center hole on your backing plate to at least 3.200 OD so it will slide over the press-on bearing that is on the axle.
Can I use c-clip eliminators for street use?
A. We do NOT recommend using C-Clip Eliminators for street use; a C-Clip Eliminator is made for drag race only ( As a safety issue so you do not loose an axle, if it breaks ).C-Clip Eliminators are made for the straight shot down the strip. If you use C-Clip Eliminators on the street the aluminum block will eventually flex from cornering or just going around curves causing the C-Clip Eliminator to leak Rearend fluid.
What do you need if I want to have a housing narrowed?
A. You would need to send the housing to us clean and bare. (Totally Disassembled — no internal parts, brakes or axles) along with instructions on what you need done to the housing. We will also need a return address and a day time phone number where we can call if we need more information. Housings when disassembled can ship UPS.
