Parts for your 2008 Honda Stream-Transmission filter

2008 Honda Stream transmission filter: do they have one and should it be serviced?

Based on Honda technical references — the Honda Stream RN6–RN9 Service Manual (AT and CVT sections), Honda’s Electronic Parts Catalogue (EPC) for the RN6–RN9 range, and period Honda ServiceNews — the 2008 Honda Stream came with two different transmissions, and the answer depends on which one it has.

RN6/RN7 1.8-litre models with the 5‑speed automatic (5AT) do not have a user-serviceable transmission filter. They use an internal strainer and case magnets, and Honda schedules fluid changes only, there’s no listed, accessible “pan” filter because the unit doesn’t have a removable pan and the strainer sits inside the case.

RN8/RN9 2.0‑litre models with the CVT do have a serviceable in‑line transmission filter (along with an internal strainer). The external filter sits in the cooler return circuit and is designed to be replaced as part of routine CVT servicing.

Why the 1.8 5AT doesn’t use a replaceable filter: Honda’s 5‑speed auto relies on an internal mesh strainer and strong magnetic capture to trap wear particles. Accessing the strainer requires transmission disassembly, so Honda doesn’t list it as a maintenance item in the schedule. For owners, that means sticking to the recommended ATF changes (Honda ATF‑DW1, which supersedes Z1) and using the drain plug and magnet to keep debris in check.

For the 2.0 CVT Stream where a transmission filter is fitted, the filter’s job is to catch the fine clutch material and microscopic metal before it can circulate through the pump, valve body and pulley set. Keeping that filter fresh helps protect shift quality, belt/pulley surfaces and overall hydraulic health. As a rule of thumb for Aussie and Kiwi conditions, many workshops pair the filter replacement with a CVT fluid service about every 40,000–60,000 km or 2–3 years, adjusting for heavy city use, towing or lots of hills. Always use the Honda-specified CVT fluid (HMMF or HCF‑2 as labelled under the bonnet) and a genuine or OE‑quality filter to avoid pressure drop or media breakdown.

Signs the CVT filter’s due can include delayed engagement, flare, a touch of shudder off the line, or fluid that darkens quickly after a change. A tidy service will usually include: replacing the in-line filter, a careful drain-and-fill with the correct Honda CVT fluid (no power-flushing), cleaning the magnetic drain plug, and a short relearn drive. Parts and exact locations vary by market, so checking the RN8/RN9 EPC diagram or a workshop manual by VIN is the smart play. Keeping this simple filter on schedule helps the CVT stay smooth and keeps service bills predictable.

• 1.8 5AT: no replaceable filter, do timely ATF‑DW1 changes.
• 2.0 CVT: has a replaceable in‑line filter, service with CVT fluid changes.

Popular questions

Does the 1.8‑litre 2008 Honda Stream have a transmission filter I can replace?
On the 5‑speed auto (RN6/RN7), no. It uses an internal strainer and magnets. Honda’s maintenance schedule calls for fluid changes, not filter replacement. Use Honda ATF‑DW1 and service at sensible intervals based on use.

How often should the CVT filter be changed on a 2.0‑litre Stream?
Pair it with CVT fluid servicing about every 40,000–60,000 km or 2–3 years in local conditions, sooner if the car tows, lives in stop‑start traffic or sees lots of hills. Always match the correct Honda CVT fluid spec shown on the vehicle.

What are the symptoms of a clogged CVT filter on a Stream?
You might notice sluggish take‑off, delayed engagement when shifting to Drive, minor shudder, or fluid darkening quickly after a change. If these pop up, inspect the filter and fluid and address any stored transmission codes before they snowball.