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How Much Do You Have I Your 4L80e Swap

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Old 10-08-2015, 10:44 PM
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Originally Posted by Preshr
I have HPtuners. Is it complicated doing the segment swap? Can I simply upload a tune from a 4L80e truck and copy over my engine tune?

If I pick up a stock take out 80e and put a stall in it, can I expect it to live (reasonably) at 500 HP? Then build the transmission down the road?

Thanks for the help so far.
An 80E or 85E in good shape can take it all day. With Tuning/Transgo HD2/Deep Pan/Extra Fluid/Good cooling/ 350K miles on a tuned by me Duramax/85E with around 100K of those at about the 800 ft/lbs at the crank power level. Regularly tows heavy as well but is not as aggressive on the go pedal as I can be. Still holding up for now.
Old 10-10-2015, 04:32 PM
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Originally Posted by shupe
Around 2k including trans, PI triple disk, modified factory crossmemeber, shortened driveshaft, yoke and frost harness.

2 things I would have done differently. Would not have went the frost harness. Also would have switched to fancy braided lines from the get go.
Can you elaborate on why you wouldn't recommend the frost harness? I was always planning on using one if and when I eventually need a 4L80. From what I understand the lockup doesn't work well with the segment swap.
Old 10-10-2015, 06:01 PM
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Originally Posted by 2plus2
Can you elaborate on why you wouldn't recommend the frost harness? I was always planning on using one if and when I eventually need a 4L80. From what I understand the lockup doesn't work well with the segment swap.
What's the issue with segment swap and converter lockup. I'm learning here!
Old 10-10-2015, 07:30 PM
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Originally Posted by 2plus2
Can you elaborate on why you wouldn't recommend the frost harness? I was always planning on using one if and when I eventually need a 4L80. From what I understand the lockup doesn't work well with the segment swap.
No need for the harness. I simply extended my harness and added the 4L80E connector and input shaft speed sensor connector from a junkyard harness. Total investment was about 3 minutes and $10 vs high dollar harness. My lockup works great with the segment swap.

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Old 10-10-2015, 08:38 PM
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Any good shop will charge right at $500 for the swap, and that's modding your factory crossmember and re-pinning your. Factory harness.. I've got around $600 in my tranny, $500 for the swap, $300 misc items, and $1,100 for PI tripple disc. So about 2,500 all together. Could've saved 1,000 on the whole thing, going with a cheaper converter and doing the swap myself...
Old 10-10-2015, 08:55 PM
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Its $500 to R&R a stock transmission here give or take. I wouldn't do the labor of an 80E swap for less than $1K.
Old 10-10-2015, 09:27 PM
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2wd pays something like 4.5-5 hours labor 4wd closer to 8, most shops now are $100-120/hr labor rate, then add time for modifying xmember, harness, tune, fluids, etc, etc... You will end up $15-1800 quick on a 4wd, not including any additional time if its got a lift on it!!!
Old 10-11-2015, 05:43 PM
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I'm at about $6000ish now. The Circle-D was $1200ish, the rest was billet parts and internals for the 80E plus labor.
Old 11-04-2015, 03:21 PM
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Trans-$300
Rebuild-$300
FTI converter-$900
Dirttrackracer crossmember-$150
Pcm of NC swap box-$250
Yoke-free
U-joint-$25
Labor-free
Dipstick-$25
Total-$1950
Old 11-05-2015, 11:40 AM
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Guys with the swap harnesses...are you running in to any issues with tuning these? From what I understand you need the segment swap with the harness too and have heard different things about issues with converter locking, is this true?


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