ATP Transmission Filter Kit P/N:B-173
Keep your automatic transmission's fluid clean and its valve body flowing freely with the ATP Automatic Transmission Filter Kit B-161 (also written B161). This is a direct-fit replacement for a wide range of listed applications, including the 1991-2008 Pontiac Grand Prix, 1991-2005 Buick Park Avenue, 1991-1997 Cutlass Supreme, 1992-1999 Pontiac Trans Sport, 1995-2007 Monte Carlo, 1999-2002 Daewoo Lanos, and the 2001-2005 Pontiac Aztek — see the Buyer's Guide tab for the full vehicle and engine list.
If a clogged or dirty filter is contributing to slipping, delayed engagement, or contaminated fluid, this kit addresses that filtration part of the service. Always confirm fitment for your specific vehicle and engine in the Buyer's Guide tab before ordering.
What does this ATP filter kit do?
It is designed to keep automatic transmission fluid clean by straining out debris from normal wear, helping protect the valve body and other vital components from clogging.
Will the B-161 kit fit my vehicle?
It's a direct-fit replacement for many listed applications, such as the 1991-2008 Grand Prix and 2001-2005 Aztek. Check the Buyer's Guide tab to confirm your exact year, make, model, and engine.
Why should I replace the transmission filter?
Every transmission accumulates debris over time. Regularly replacing the filter helps keep fluid clean, extends transmission life, and can reduce the chance of costly repairs.
Is this the same part as B161?
Yes. The manufacturer part number is written both as B-161 and B161 — they refer to the same ATP Automatic Transmission Filter Kit.
Can a dirty filter cause shifting problems?
A clogged filter can restrict fluid flow and may contribute to slipping or delayed engagement. Diagnose the cause first; if the filter is the issue, this kit addresses that part of the service.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.