differential is humming

[peety]

i am looking for a rebuilt or used differential for a 94 q45 non active susp. if anyone knows of one please get back at me. at first i thought it was my tires but someone told it was my differentilal. and also how much would the window amplifiers cost for my windows, rf, rr, lr.

[qsiguy]

You sure it's not the fuel pump that's humming? That is pretty common when they are getting ready to fail.

[Rex]

You sure it's not the fuel pump that's humming? That is pretty common when they are getting ready to fail.

Good point ... does it "humm" while sitting still.

[peety]

no it doesnt. just while i am driving.

[Fenvy]

you should jack up your rear of the car, have your wife, kids, or someone gas the car a little to hear the hum.

Most likely it is something else, such as brake pad/rotor issue.

even if it is the differential, have you tried to change the fluid?

[Q45tech]

Diffs can last 200,000 miles [10 years] if the lube is PROPERLY changed every 30,000 miles................they start to make noise giving you plenty of time to find a junkyard unit with less than 100,000 miles.

[superuber]

you should jack up your rear of the car, have your wife, kids, or someone gas the car a little to hear the hum.

Most likely it is something else, such as brake pad/rotor issue.

even if it is the differential, have you tried to change the fluid?

If your gonna do this for goodness sake don't put your head down there! I would advise against this unless you have a lift.And don't say "thats obvious!" All one has to do is type in the web "dumb stuff people do"

[Fenvy]

If your gonna do this for goodness sake don't put your head down there! I would advise against this unless you have a lift.And don't say "thats obvious!" All one has to do is type in the web "dumb stuff people do"

right, don't put your heado down there but just stand behind the car, on both sides of the wheels should be able to locate the problem.

as long as the car is facing outward from the garage, and that your head is not down there, you should be fine in the event of unlikely jack stand failure

[peety]

well here is the story. i was on the way home fromwork andwhen i got there i see a film on my trunk and in the inspection i found that my plug was missing. so i took it to my mechanic and he put a new plug in it and filled it up. now the drive was at least a 30-45 min. drive and i wonder could that have damaged my diff. its like my whole car is starting to go to #?$%. and now i am wondering should i invest this money into it. i plan on keeping it and using it as an extra. i have plenty more questions but i guess i will be patient.

[maxnix]

Experienced change all fluids immediately unless there is documentation and subsequent inspection to the contrary.

Might want to read the trunk on your car. I don't think you will see a Y.

[peety]

you mean transmission and diff. fluids? anything else?

[peety]

i am on my7 way today to get a tune up and now i have another problem. when i start my car, let it warm up there is a putt putt when i accelerate. its not loud or anything, its just like a vibration when i give it gas and when i come to a stop. now when i am at a complete stop it doesnt do it but as soon as i let off the pedal its doing it. all the help yall have given me is very appreciated and listened to. thank for this website and your help.

[Q451990]

i see a film on my trunk and in the inspection i found that my plug was missing. so i took it to my mechanic and he put a new plug in it and filled it up. now the drive was at least a 30-45 min. drive and i wonder could that have damaged my diff.

You're saying the car was driven with no oil in the differential for 30-45 minutes? And then you drove it some more to get it to your mechanic?

Yeah, it's probably toast...

Heath