Auto trans gurus: power braking to heat trans fluid?

[brods]

In winter would bumping the rpms up to 1,000 at stop lights while in gear cause any harm to the trans?

 

[cerberusiam]

Won't hurt the trans but it might not be good for cars around you if it gets away.

 

[Bob4x4]

Power braking is not good for any auto trans

 

[LNaugle]

Come on Bob... YOU mean you don't do big smokey burnouts with your 05? :-laf Just kiddin...

 

[cerberusiam]

With a flash stall around 1800 rpms 1000 rpms is hard to equate to power braking.

 

[Bob4x4]

Come on Bob... YOU mean you don't do big smokey burnouts with your 05? :-laf Just kiddin...

Lol. I don't need no stinking brakes. Oo.

 

[Bob4x4]

With a flash stall around 1800 rpms 1000 rpms is hard to equate to power braking.

Sorry I am conservative with other people's rides

 

[sag2]

Like most things, you have to use your head. A little power brake will warm the fluid, a lot will burn it along with the potential to burn parts as well. I do not see 1,000 RPM power brake for 30 seconds at a stop doing any damage, but it should only take a couple of stops to warm the fluid up some.

 

[rscurtis]

What is the benefit of trying to warm up the transmission? I could see the purpose of power braking to warm the engine (espescially in Michigan).

 

[brods]

If I’m not mistaken the trans oil always flows through the coolant/trans oil heat exchanger on the side of the block. That means the trans fluid will suck heat out of the coolant until the trans warms up which will make the engine take that much longer to warm up. By bringing the rpms up the engine heats up more and the shearing of the trans fluid in the converter heats the trans oil so everything heats up faster. I have a trans temp gauge in the hot line and only bring the rpms up at the first few stop lights when the trans temp is below 100F. Does it make a huge difference, I don’t know, but as long as it is not hurting anything …. .

 

[sag2]

The new 1500 with Stop Start uses a trans fluid heating system to heat the fluid on a cold start. You guessed it, there for fuel economy improvement. Warm fluid, less friction.