Type of auto transmission fluid 98 4Runner

[Newenzo]

Thanks again a to all. For now I'm going to drain and refill, but in the future I will definitely consider a full flush.

 

[kolelt]

Neither is wrong. You can do both. One requires more labor and fluid. Other doesn't. Neither will demage anything. And I don't think Toyota manual mentions about requiring to drop the pan to change att fluid. Everyone is different there for everyone will do things differently. That's all. No reason to get all salty.

 

[T4R2014]

Neither is wrong. You can do both. One requires more labor and fluid. Other doesn't. Neither will demage anything. And I don't think Toyota manual mentions about requiring to drop the pan to change att fluid. Everyone is different there for everyone will do things differently. That's all. No reason to get all salty.

This. The "new bong" comment was unnecessary. It's transmission fluid, chill out.

 

[JohnJMonroe]

Id just like to point out that all of the automotive powertrain engineers I asked and all of the Transmission shop guys I've asked about this have said not to take a 200,000 mile auto transmission to a place that uses one of the flush machines. They all say that procedure is to violent and tends to knock all the deposits in the transmission loose and clogs things up causing failure.

I don't have any experience with the flush machines. I flushed my transmission using the drain (from the cooler line) and refill method. My old ATF was black and burnt. Its like driving a new truck now with the Valvoline Maxlife.

 

[AZ4Running]

Flush is best but there is nothing wrong with a drain and fill. There are some cases where drain and fill may be the only option. I did a full flush with a flish machaine that hooks up inline with the trans cooler, shop flush machine. I used Valvoline Maxlife full synthectic.

 

[Nunyabiz]

Id just like to point out that all of the automotive powertrain engineers I asked and all of the Transmission shop guys I've asked about this have said not to take a 200,000 mile auto transmission to a place that uses one of the flush machines. They all say that procedure is to violent and tends to knock all the deposits in the transmission loose and clogs things up causing failure.

I don't have any experience with the flush machines. I flushed my transmission using the drain (from the cooler line) and refill method. My old ATF was black and burnt. Its like driving a new truck now with the Valvoline Maxlife.

"Flush Machines" today just use the trucks own pump to move the ATF through the Torque converter it really should be called a "ATF Exchange" machine.
The fluid is not forced through under any more pressure than the cars own pump provides.
The old style "flush" sometimes even used detergents to supposedly clean the deposits out, THAT was a bad idea and what most of these Transmission people are talking about when they say not to "Flush"

https://www.youtube.com/watch?v=nQ3m16LS1VI

 

[slapdappy]

I just can't be doing the full flush right now, I don't even have a friend that could help out.

if you have time to do a drain and fill you have time to do a bucket style full flush. It will be less messy.
use the hash marks on this bucket as a rough guide re # of quarts out and in.