Transmission flush

JUSTINRP138

MEMBER
1995 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
90,000 MILES

I heard trans mission flushes could be bad for your tranny. And then I read in a article that a good way to clean your tranny is to replace a quart of oil with a quart of transmission fluid. Should I pour the tramnsmission fluid in the same tube as the oil? Is it bad to do or what would you prefer?

Tuesday, June 22nd, 2010 AT 5:54 PM

2 Replies

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

If you put tranny fluid into the oil that will never get to the transmisison. That stays in the engine. I'm assuming you mean adding engine oil to the transmission to help clean it and no I would not recommend that at all. If you have never had the transmission fluid and filter replaced than you should drain and replace it, but don't flush it.

Was this

answer

helpful?

Yes

No

+1

Friday, April 9th, 2021 AT 7:22 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

A transmission flush is done with a dedicated flushing machine that constantly adds fluid while the trans is running, ensuring that all the oil is changed and harmful deposits are removed, the pan is also removed and the filter is replaced, this type of service is not recommended to be done at home as you can damage the transmission if it is not done correctly.

Mark (mhpautos)

Was this

answer

helpful?

Yes

No

+1

Friday, April 9th, 2021 AT 7:22 PM