I got a 2003 Chevy Tahoe with 130k. I never changed the differential fluid until the other day. A day after it was changed, it started to have trouble coasting. I was going about 25-30 MPH, I took my foot off the gas and it had trouble coasting. When I put it in drive, it hesitates to move unless I give it gas. What could be wrong?
I think Scotty is a little confused.
Jack up the vehicle.
Turn each wheel by hand, feeling for resistance.
It's going to be a stuck brake, demolished bearings, or something like that.
Or ujoint
Well, if the fluid had never been changed you should have left it alone. Changing it at that mileage that old and dirty can often cause problems. If you have saved the old oil I would advise draining it out and put in the old oil back in
What would those problems be? What would happen to my car?
Are you talking about the differential fluid or the transmission fluid? Two completely different things.
What would those problems be? What would happen to my car?
That recommendation was for transmission fluid, changing differential fluid can be done at any time even if it is overdue. (Though if there is wear in the diff due to lack of maintenance it obviously won't fix that.)
Now you might coincidentally be experiencing problems with your automatic transmission, which I think is what Scotty was thinking of when you talked about fluid change. It's 20 years old after all and the trans could just be worn out, especially if it has not been serviced properly over the years.
Looks like it's been about six months since your initial inquiry, what has happened with the Tahoe during that time? Have you been driving it? Are the current symptoms the same?
Yeah, I've been driving it more frequently. In the last six months I've put another 10k on it. Most of the time, it's fine, and at certain times it doesn't want to move when in drive, but it goes away after awhile. The Brake Pedal felt really stiff. It wouldn't coast very well then the brake pedal would stiff up, and after driving for awhile, it's fine again all of a sudden. I had one caliper replaced and it seemed like it was fine. I thought it might have done it ever so slightly once in a while, but it could've been me. It did it again yesterday, but felt worse. I took my foot off the brake and the gas, it didn't want to move and thought I smelled something burning. When I let my foot off the gas, it like wanted to slow itself down. After awhile of letting it sit, I drove it around and it was completely fine coasting, reverse, fowards, accelerated quickly in reverse and drive, no weird feeling in the brake pedal. Drove completely fine around the neighborhood, no stalling, no deceleration.