when i accelerate, ive noticed this before but it seemed to disspear but it has reaapeared, the car makes a humming noise, sort of like a jet, if that makes any sense. what could this noise be? i think ive searched this before and it has to do with the power steering pump or alternator?

 

you searched for the wrong thing, transmission.

 

your saying this humm is coming from my transmission? that sounds severe, is my transmission going bad?

 

i just posted about this..dont know if it helps but try searching in the transmission sections for transmission whinning..hope it might help you =)

 

What you're describing sounds like when my transmission was going. I have Supra TT auto transmission but I would imagine it would sound the same because they're almost the same.

If you need a transmission let me know. I still have my stock SC300 automatic transmission (and torque convertor, and driveshaft, and some misc parts off the engine) left over after the swap. I'm willing to let it go for cheap.

Chris

 

thanks alot i'll keep you in mind if it really does happen to go out. but i still cant understand how my 92 SC3 with 96k has a bad tranny.

 

Overfilled, underfilled, fuild brakedown, broken traction control, harsh driving, etc etc. Lots of reasons.

Chris

 

The rule of thumb is, "accelerate = tranny" "decelerate = center bearing"

 

might be harsh driving...

 

I have thesame problem in my sc400,but it also makes a clunk when i put it in reverse or when i decelrate and acclerate fast,A buddy of mine told me it might be the U bolts? any ideas?

 

mine sure doen't clunk but also can it be the engine, tranny mounts?

 

2 engine mounts and 1 tranny mount, check 'em and replace 'em. The tranny mount is the easiest and only costs like $50 from Carson Toyota. I'd replace that one first and see if it eliminates the clunking.

 

Doubtful it's a mount. You would feel a vibration at high speeds from un-even driveshaft. If the humming more of a scratching sound?

Chris

 

hmms like a whistle, very light, barly noticeable over my exhaust, and not there with music. also doesnt always humm.

 

Funny you say that. When I first heard the noise I thought it was a boost leak because it does sound like a whistle a little. Hopefully it's not it.

Chris