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Originally Posted by Srjustin
Ok thanx guys and what do you mean by shim it?
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Here is the article on shimming.
The J30 VLSD has an ABS sensor ring on the nose that adds about .75 inches to the overall length. About half the people on the internet say this requires a shorter driveline, (ABS) or it will destroy either the carrier bearing, or the rear tranny seal. The other half say that this is not an issue.
When installing these in S13's a lot of people are slamming up 1.5 inch washers to use for the front diff mounts. The S13 doesn't use the rubber grommets that the S14 and the J30 do, and if you don't hard mount the front of the diff, the rear S13 cover will break, as it is taking the torque load. (You do need the rear diff cover for your installation) We bought the aluminum spacers for the front mounts, since that provides a lot more stability.
Since our car isn't going to be tracked, we saw no need in welding a diff, or spending 15-1800 on a KAAZ. Welding is only good for smoking tires, bad for handling as a DD, and bad on tires. So for us, the VLSD was a logical choice. We'll start the installation in about an hour. There is a lot of info on this, and most of it contradicts itself, so I guess in a couple of hours, we'll know.
If we have driveline issues, we'll get an ABS single.