Listed below are the part numbers and pricing for the “Torque Ball Seal” for both the Aluminum “MPD” style bellhousing and the steel “DMI” style housing.
These two housings are the only ones where we have physically confirmed the fit. To our knowledge, these comprise the vast majority of the parts in the field, and other bellhousings, such as the Winters aluminum bell housing and the DMI aluminum housing appear similar to MPD, however it is incumbent on the customer to trial fit the parts and confirm the fit.
As with any racing part, there are numerous copies and “one-offs” of these parts. Seals-it does not, and cannot represent that we will fit all of them.
Additionally, the parts were made to what appear to be the most common motor plate style currently being used; The motor plate should be a “nominal “ thickness of .375” (3/8”), +/- .019” (1/64”), with an I.D. hole of 6.0”, +/_ .019 (1/64”). Plate thicknesses or hole dimensions other than those specified WILL cause part malfunction.
At the present time, the only engine style these fit is the Chevrolet crankshaft flange bolt pattern of 3.580” diameter, which is the most common in use at this time. Note that this is the flange pattern used on the two piece oil seal crankshafts. There may be some groups that require the use of “stock” crankshafts. One piece rear main seals used after 1986 have crankshafts with a 3.00” bolt pattern. The “cup” will not fit these. Since the vast majority of aftermarket crankshafts and blocks use the 2 piece seal style crankshaft, there are currently no plans to offer a cup for the 3.00” parts.
Similarly, FORD and Chrysler engines use a different crankshaft pattern. SHOULD A CUSTOMER DESIRE PARTS TO FIT EITHER OF THESE ENGINES, THEY WOULD HAVE TO SUPPLY SAMPLES OF ALL THE NECESSARY COMPONENTS AND DELIVERY WOULD BE 8 WEEKS MINIMUM. In addition, pricing would be quoted separately and would most likely be somewhat higher due to the lower production volumes involved. To get similar pricing to the existing pieces (NOT THE SAME..- SIMILAR) a minimum order of 50 seal assembles would be required in addition to tool charges if needed.
Note that some midget engines (Gaerte, possibly Fontana) that use a motor plate and crankshaft of matching bolt pattern and engine plate hole size may fit as well. Specials for midgets or other types of cars would be subject to the same requirements as noted above to have parts made.
All parts will be supplied with a “Black “ anodized ring around the seal, and a "Hard Coat” anodize on the cup
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