Newer models have an adjustment screw that can tighten the B3 brake band, but older ones (yours) do not have that. That is more symptomatic of slipping in reverse though--your problem may lie in a clogged area in the valve body making it a bit more difficult for the fluid to pass through and build up the proper pressure quickly. A fluid and filter change can't hurt.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth