I thought a year ago I needed a new torque converter, but it turned out to be a loose tune. This past April I had a slight rumble and grind that lasted a few seconds under light acceleration, but I could not repeat it. Fast forward 2 months and it shows up again, but is was never repeatable. I did some stall tests and ran the diagnostics on the transmission and nothing shows up, except for slightly low line pressure
. Happens again about 1 month later, again with no "smack me in the forehead with a 2x4" diagnosis. Go out an hour later and run a stall test and it stalls out at 1300 RPM; finally seems to show a problem, but no other symptoms or noise. Run stall again and it shows 1900-2000 RPM
. Take my boat out to the lake and on the return trip it starts to slip with a bit of grind, almost like something is loose, then it runs fine. Changed the fluid and filters, dropped the pan and everything looks pretty reasonable, except for the grey mushroom on the magnet! Give it another stall test and it screeches like a bad turbo or up-pipe leak. I pull the turbo disassemble it and all is fine. Well, that was a waste of 2.5 hours, but at least I can tell Charlie the turbo is holding up just fine. Now I am back to realizing it was probably just the TC and perhaps the clutch pack were a bit worn (trans still shifts really well), I called Andy Warren and ordered the Comp Plus with the Stallion converter. The end point of the story is that the TC was not displaying a typical breakdown.
So 2 days later I am dragging the boat out to the lake. I thought I had a bit more drive left in it, but it started making rattling noises on the way home again, but this time I could push through the TC. The funny thing is, the fluid still looks and feels good and the temps were pretty steady at 158*. It is now parked waiting for the new transmission to arrive!
If the delivery gods are on my side I will have it installed by Saturday, but I suspect it will show up after I head back out to work, so it might be another week or 2.
I will take some pictures of the pretty little thing when it arrives. I will cut the TC apart for some damage assessment. I may crack the trans as well. I guess the new lawnmower will have to wait until next year