Downshifting 4l80.
07-07-2011, 08:34 AM
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Downshifting 4l80.
Will down shifting my built 4l80 from lockup to 3rd to 2nd in the proper speed range of course hurt it? I have a big tranny cooler on it, I've heard u can but wasn't sure. I burnt up my stock 4l60 down shifting thats why I'm asking you guys 
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07-07-2011, 12:35 PM
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No auto trans should burn up due to manual downshifting in the proper speed range. That's what those gear selections are there for; if they didn't design the transmissions to be manually downshifted, you would only have P-R-N-D on your dash and nothing else.
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07-07-2011, 01:52 PM
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manual downshifting can hurt the 80e. not due to heat but due to mechanical strain. it is a relatively small sprag that will eventually give way....especially when dropping into 2nd
