Not sure if i have a bad exuast valve or somthing esle

[viperfangs2]

My truck makes a pisst noise like a burst of air mainly when i shift gears.
I sounds like what an exuast value sounds like when they go bad but this only happens when i shift so i am not sure.

Any ideas?

 

[viperfangs2]

This truck is making me anger!!!!!

 

[pillen140]

sounds like a turbo blow off valve! jk. maybe a vacum leak? is it only when the rpm drops?

 

[viperfangs2]

Yeah it may be that it is a vacuum leak because when i put my hand over the throttle the truck doesn't die. and a hear a sucking noise by the transmission.
And thats where i always hear the noise

 

[pillen140]

use carb cleaner to find out where it is, just spray at it, and the engine will bog down when you found it.

 

[viperfangs2]

is it only when the rpm drops?

RPMs do drop when you shift right? if so then yes

 

[viperfangs2]

Well it also happens when i reve the engine at idle but not all the time

 

[MAKG]

Any chance you're burning ATF?

Disconnect and plug the vacuum modulator. Your transmission won't shift correctly, but your engine should work better.

 

[viperfangs2]

I drained the atf fluid and I put 80 weight gear oil in yesterday day

 

[BlackBII]

I drained the atf fluid and I put 80 weight gear oil in yesterday day

 

[viperfangs2]

some guy on this site told me to put atf fluid in my tranny so i did then i got back on 2 days latter and another guy said that aft fluid is wrong well he was right im supposed to put gear oil in it

 

[BlackBII]

Do you know what tranny it is?
http://www.therangerstation.com/tech_library/ManualTransmission.html

 

[BlackBII]

I just read the thread on your tranny fluid, You have the TK
Ok, I understand why now, sorry

As for the hissing noise, does it do it at idle?
You really need to get a flashlight and try and track it down