I bought a tranny filter kit from BMA about four months ago that came with a
non-Filtran filter along with the pan gasket for about $20. I filled it up with
Redline D4 ATF and noticed a whine under load in first and second gears. Since I do a lot of highway driving, I wasn't in a big hurry to diagnose it. Well, this weekend, I drained the fluid and installed an OEM "Filtran" filter from the stealer along with 7.5 quarts of Pennzoil Multi-Vehicle ATF that Kragen is now selling for $3 per quart. Car now no longer has any whine sounds in any gear and everything is great. One thing I noticed about the filter kit I bought from the stealer this weekend was the O-ring. I compared the O-ring from the BMA kit to the stealer kit and noticed the OEM O-ring is slightly thicker than the kit supplied by BMA. I'm now wondering if a generic 5HP30 filter along with an OEM O-ring would work.