I did a search on this but I cannot find what I am looking for. I would think it just means the tranny is going out but I want your input on it. It is a 96 LT 4x4 with 135K miles on the auto tranny.

The problem is when I put the Blazer in park, neutral, or reverse, it begins to vibrate when it is up to operating temp. Reverse is the worst. It really gets vibrating. I am assuming that it has to be the tranny. It had not done it at all in drive, 3,2, or 1.

I have checked the tranny fluid. It is a lilttle low (it is in the cold range when it is up to temp) but I don't think that would do it only being that low would it?

Any help would be very helpful!

Thank you very much!

Kenton

 

What does the transmission mount look like? Motor mounts?

It only does it when it's up to operating temp?

 

I have not had a chance to check the mounts. I have not driven the blazer in probably a month now, and I just started driving it again on Sunday (drove it 200 miles or so). I will check the mounts tonight if I get off work at a decent time (warm weather and melting snow is a horrible time of year for me working for a phone company).

The more I thinkk about it, it don't really seem like it is ONLY operating temp. Last night after work I started it to let it warm up and it wasn't doing it when I started it, but when I went back out to go home it was. But that was only like ten minutes so it wasn't up to operating temp yet. Same thing this morning when I went to work. When I started it, it wasn't doing it, but when I left ten minutes later it was.


**EDIT**

So I just got home from work. I tried a little test before leaving the office. I started it and only let it run for about thirty seconds. It was not doing it in park. Right when I put it in reverse, it started a really noticable vibration. The drive home, nothing. When I pulled it in the garage there was nothing in drive. Put it into park, thereis the vibration. Slap it into reverse, the vibration is there and vibrating worse. Out it intodrive, I think there may have been just a LITTLE vibration, but I couldn't tell if it was just from the motor running or if it was coming from under the blazer.

On thing I know for sure, it is ALWAYS the worst in reverse, noticable in neutral, and a little more noticable in park then neutral.

Thanks guys!

Kenton

 

I would definitely have a look at the transmission mount.