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im sorry your having this problem
so this problem has been there for a long time even before old transmission was rebuilt ?
your old one was rebuilt correct? not replaced with a new one ?
do you know if there are any codes in the computer ?
and it seems to do this when the TCC locks up into over drive and if you kick it down with the gas pedal the noise will go away ?
yes, problem was there before rebuild (not replacement)
haven't had codes pulled yet, that's my next step
not when in overdrive, typically 30-40 mph, 1500+/- rpm
had my mech check driveline, bearings etc. could not find any other problems
is it a matter of it seems to be shifting too quick into the next gear and almost lugging the engine down ?
similar to if you are driving a stick shift and upshift to next gear too early and it drags the engine down so to say ?
no, sometimes sound is loud other times not so much, rpm jump a little when this happens and can fell it through the pedal. sounds like its coming from trans area under the shifter. happens more when its cold not as bad when trans warms up. intermittent so when I took it in to my mech it would not do it. from research online sounded like its the tcc cycling but not engaging could be bad tcc solenoid or pump pressure too low
Frank low pressure would cause slipping of the gears
it can be tcc chatter but only when its in tcc lock up with is over drive unless the tcc is being applied when it should not be
since it was doing this before that rules out a few things
Frank lets start slow with this lets first have the computer scanned for any codes in the computer history or current
any Pep Boys or Auto Zone will scan for free and tell you any code numbers
these computers are always monitoring the transmissions tcc and shaft speeds and if the tcc was not fully applying or usually if anything was not doing as it should electrically in the transmission
here is a link to a similar problem
how do I get back in touch after I've had codes pulled?
Frank you can always get me right back through this post any time with any follow up with this problem even after you rate us here at Justanswer !
Frank if there are no codes the next step is to monitor transmission live data with a scan tool when its acting up to see what the slip speed is reading and the TCC
this is tough as the TCC should only be locking up and applied when its going into over drive
also with the scan tool they can lock up the convertor with the scan tool and see if when they start locking it up by % increments if it will make that noise when they keep applying the TCC and what % they command it does this
I read the post and the issue I have with most of that vehicles issues is the transmission you have is yours is not slipping and the tach jumping showing the convertor was slipping from running this with 2 quarts low of fluid
this can be the torque convertor itself causing the brrrr noise
when rebuilt did a new convertor be installed ?
the post was not me but a similar situation
new tc was installed with rebuild
so maybe not the tcc could it be the transfer case?
yes it can be
will it do this in 4HI ?
don't run Torque on Demand (TOD-4hi) often so not sure
Frank check for codes first
then see if the noise will be there 4HI