Opc

So i decided to dive in and learn how to rebuild my transmission myself. Took the case off, rear end, etc, pretty much all the rear case bearings are bad. Scoring on the races, however there is no grit or oil issues...

what could have caused this ?

idea-catalyst

My daughter has a MY01 and we just had to have the tranny completely rebuilt. Bearings were whining. Both the dealer and my trusted mechanic diagnosed the problem as having been caused by the previous owner using the wrong fluid (too heavy) in the tranny. I suspect it was just a stupid mistake - I hope it wasn't to save a few dollars because the Honda fluid is a little expensive. If the latter is the case, the dufus (a**hole) saved a few bucks and cost me many hundreds.

Gernby

IIRC, the early S2000's had an oil starvation problem from sustained hi-G corners. Has this car spent much time on a track?

Saki GT

That's not related to the transmission, that's an engine issue.

Gernby

Are you sure? I believe there was a member that had 2 transmission failures due to the oil pickup not extending low enough in the transmission, so his solution was to overfill the transmission a bit by tilting the car to the right when refilling it.

Slows2k

The S2k trans has a internal oil pump. It's one of the few cars that has pressurized oiling in a manual transmission.

The secondary reduction shaft and numerous other bearings are all higher that the oil level inside the case. This requires pressurized oiling to work.

Run the trans low on oil, the bearings will fail. The secondary reduction shaft gear is the highest in the case, and one of the largest. It is the 1st to fail.

Slows2k

The oil pump's pickup is at the bottom of the case. If there is oil in the trans, it's covered. There is also a check valve and a oil strainer as well.

RedY2KS2k

Slows2k,

Is there a scenario where towing the car with the rear wheels on the ground could contribute to transmission problems? i.e. Which shaft drives the pump?

I know that towing with the rear wheels on the ground is verboten, but doofuses (doofi?) do strange things.

Slows2k

I believe SpitfireS made diagram of power flow through the trans. This has come up before.

I'll need to look over a service manual to be certain.

Slows2k

After verifying with the Manual, The oil pump is driven from the countershaft, which is driven by the secondary reduction shaft when the car is towed in Neutral.

If the car is towed in neutral with the real wheels on the ground the trans oil pump is turning.