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Ac not working properly at highway speeds

Posted: Sat Oct 08, 2016 3:23 pm
by Madslammer
I have an aftermarket ac unit on my 77 te38... it works fine at idle and regular city traffic, but when driving at 40 mph up it just blows cool ( not cold) air... any ideas? Thanks

Re: Ac not working properly at highway speeds

Posted: Sat Oct 08, 2016 3:31 pm
by BOBLOOK
Maybe wrong pulley combination diameter to big or small?

Re: Ac not working properly at highway speeds

Posted: Sat Oct 08, 2016 8:46 pm
by Madslammer
How is this?...
How do i know if it's too big or too small...?
The old compressor had a slightly smaller pulley...
???

Re: Ac not working properly at highway speeds

Posted: Tue Oct 11, 2016 6:04 am
by BOBLOOK
Check the unit specs for the operating rpm