jhink92

So i have a 90 miata with 247k miles, the enine has been replace by mazda when the previous owner owned it (have receipt) but im curious on the whining noises. on acceleration from around 2500-3200 my car makes that really obvious rattle or whatever from the transmission like everyother miata does so i heard, and when your at higher rpm and let off the gas. I just wanna know if this is normal. also i just changed the fluids and it was clean so with that said, opinions please? it doesnt grind or anything like that. Also i have a friend who knows his stuff fairly well and says my diff is whinning very faintly but also i changed that with lucus and there were no shavings, i dont doubt his knowledge on miatas but i dont really know what im listening for and im ruff at hearing and dont hear anything from the diff over the tranns noise so any input on that would be appreciated...thanks!

Braineack

iTrader: (62)

does it whine in 4th?

jhink92

I dont think so but I'm out of class in around a hour so ill check...what if it does?

Braineack

iTrader: (62)

if it doesn't then it's the trans for sure.

Bond

iTrader: (6)

Diff=Blown

jhink92

So I couldn't get fast enough on the roads home to get it in a high rpm for 5th but every other gear whines when you let off the throttle.

jhink92

and I'm fully aware my diff's on the way out, saving up the cash to buy a 1.8 diff

jhink92

Btw braineack, since it does infact whine I'm in good shape? Atleast reliable shape for a while?

Bryce

iTrader: (24)

What's an enine?

jhink92

Wooohoo fella my bad, I wasn't typing this thread on an out of date touchscreen phone in the middle of class or anything like that.

Bryce

iTrader: (24)

I'm just playing with ya.

My transmission whined for more than 10k miles before it went out.

miata2fast

iTrader: (2)

Has it been whining very long?

In my experience with failing 1.6 diffs, once they start whining, it is not long before you are stranded.

Bryce

iTrader: (24)

^ That too. My diff skipped the whining phase and went straight to grinding during my first autocross at 140whp. I went to an AX the next weekend with the grinding getting progressively worse and the diff blew up within a mile of home after that.

jhink92

Yea bryce I was just playing back, I'm really very chill lol but idk I can't hear it honestly. My friend says he can hear it, but while my hearing may be bad its acute for sketch noises and such, tell me what in particular I need to listen for with the diff and or when the noise will occur, and iv heard of these transmissions going for half their life whinding when you let off the gas.

Bryce

iTrader: (24)

Doesn't sound like its a very loud whining. The whining will would probably be loud enough for you to hear if it is a sign of imminent failure.

jhink92

I havnt the slightest idea of what to listen for or when

Braineack

iTrader: (62)

does the whining sound like this?

Bryce

iTrader: (24)

Or more like this?

Braineack

iTrader: (62)

I had both those at once; it wasnt cool.

miata2fast

iTrader: (2)

Nothing makes a bright sun shiny day like total drivetrain failure.