th 350 how much slip

[Ed ke6bnl]

I have a 350/350 in my 72 El Camino.  I have 3.08 gears and on the freeway at 60mph and I get on the gas there seems to be a lot of RPM increase far more then the added mph change. seem to be a 5oo rpm increase instantaneously.  Seems to run more rpms then it should for the 26 in dia tires and 3.08 gears.  Then I guess there is the issue of the speedometers acurracy.  Ed ke6bnl How much slip in the th350 is normal. thanks

[Crosley.In.AZ]

sounds like a stall speed converter , rather than a stock uint.

Do you know if there is a mild stall converter in the tranny?

[enjenjo]

Or a convertor going bad.

[Crosley.In.AZ]

or a converter not getting properly filled by the lube system.

[Ed ke6bnl]

sounds like a stall speed converter , rather than a stock uint.

Do you know if there is a mild stall converter in the tranny?

I just bought the truck after the previous owner ran it into a poll.  We changed out the frame motor put the same trans back in with 3.08 gears.  I hope to upgrade to a 700r4. Don't have any history and the guy I got it from has move out of the area.  Ed ke6bnl