If it pulls to the right upon intial brake application, then the pull dimishes (while holding braking prssure steady), replace the rubber lines to the calipers.

If the pull remains constant under the same circumstances as above, look at the left caliper for your problem.

The line, if restricted, will eventually allow pressure to equalize. This has the effect of diminishing or eliminating the pull.

If the caliper is bad, the braking force will not equalize, and the pull will remain.

Jim

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