One is Ratech brand... other 3 piece design unit, I dont know the brand.
Good , bad? Use the crush sleeve?
Drag race car. 4.86 gear, spool
Both spacers. 3 piece design on top. Ratech 2 piece design on the bottom. Sleeve with shims
3 piece design, hard parts & shims. Center part flipped over for viewing ... This one has a recess to recieve the shims on one side. Other side has a raised design.
Which pinion housing do you have? If you have the Daytona then they use a solid spacer. You can use a crush spacer from a 8.8 with the Daytona, but for a drag car the solid one is probably better. If you have a standard pinion housing then you will probably need to use the standard crush spacer. If your solid spacer is for the Daytona then it won't work in the standard pinion housing.
Many times when using a solid spacer I would get into a situation where .002 was too much shim and .001 wasn't enough to get the correct bearing preload. In a case like this you can put sand paper on a flat surface and sand the spacer about .0005 to get the bearing preload where it needs to be. Just be very careful to take the same amount off of the spacer all over the surface that you are sanding. You do not want it to be thicker in one area.
I usually torque the nut to 200 ft lbs. Some people only go to about 125 or 150. You can make slight adjustments in the preload by the amount of torque that you apply to the nut. I always use the red Locktite on the nut.
I don't like Ratech kits, but they do make some good parts. Some of the parts that Ratech makes are not available from anyone else. They Ratech kits have some junk parts in them.
Many of the solid spacers have instructions with them that say to torque to 125, but you can go much higher than this if you want to. I think Ford recommended 200 foot pounds for their solid spacer.
The Excel gears are a cheap version of the Richmond gear. They might be quiet, but don't count on it.
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