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Old 04-24-2016, 05:54 PM
carpoor carpoor is offline
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Default I have bad luck with 4L60Es lately...

Converter stopped locking up in my truck Friday. Borrowed my father's Sierra, filled it up this evening. Started to leave the gas station... Bang! The sunshell broke just like my truck. His transmission has barely 20K miles on the rebuild. No 2nd,OD, or reverse. I needed his truck to get to work while I got mine fixed this week. Now his is broken worse than mine. ::sigh::
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
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Last edited by carpoor; 04-26-2016 at 04:07 PM.
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Old 04-25-2016, 08:02 AM
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chevymaher chevymaher is offline
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Monster transmission sells upgraded trans really reasonable. 500 HP jobs and they just about the same price as stock. 1700 or something like that.
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Old 04-26-2016, 04:08 PM
carpoor carpoor is offline
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I am pulling my truck apart anyway, so I have started to pull his transmission out. I am going pull mine out Friday after work. I already grabbed another converter. I'll make one running truck out of two. lol
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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Old 06-02-2016, 06:35 PM
carpoor carpoor is offline
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The builder made good on the transmission out of my father's Sierra. He rebuilt it and supplied the parts for free. Said it looked brand new inside, other than the busted sun shell.

I guess now he has a good spare transmission. I will never go back to a 4L60E, 4L80Es are just so much more durable.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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Old 10-02-2016, 07:43 PM
carpoor carpoor is offline
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And the saga continues...

His truck was running great. Then started to miss shift and slip. Took it back, full of metal. Supposedly fixed... converter wouldn't stay locked. I dropped it off almost 2.5 weeks ago, still don't have it back.

We're going to start buying parts for the 4L80E swap in his truck. Tired of these weak transmissions.
__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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Old 10-22-2016, 06:08 AM
carpoor carpoor is offline
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Got the GMC back yesterday. Ended up using a completely different case and valve body. So far, so good. I am still leaning towards a 4L80E swap in the future.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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Old 10-22-2016, 07:02 AM
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Hank70SS Hank70SS is offline
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Probably not a bad idea. The 4L80E is a much tougher trans. That was the trans in our old motorhome. Moved that motorhome while towing a car, never had a hickup with it. We had a small Blazer before the Trail Blazer with a 4L60E. Blew the sun shield to pieces.
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Old 01-25-2017, 01:21 PM
carpoor carpoor is offline
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That was short-lived... forward sprag took a dump yesterday. Good thing he has a spare. In the process of swapping it out now. I stressed to him repeatedly - get a 4L80!

Now he is wishing he had. Definitely putting one in their Pro Tour 72' Malibu. No room for mistakes with that car.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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Old 02-21-2017, 03:12 PM
carpoor carpoor is offline
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Problem solved! Picked up two 4L80Es today.
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__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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