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Run your 4L80E swap on a 4L60e tune with no segment swap

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Old 03-23-2012, 05:30 PM
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Nothing. I have mine running without PWM. It locks up just fine. Chris at CircleD said it is fine doing away with PWM on a single disc but a multi disc he said the lock up is rather abrupt.
Old 03-23-2012, 05:37 PM
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Originally Posted by Atomic
So.....about my question....what happens with the torque converter if the pwm signal isn't there
It will still work like an on/off switch so the lockup will be harder.
Old 03-23-2012, 05:40 PM
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Originally Posted by 1slow01Z71
I found this info from a quick Google search, I believe this is the schematic everyone is talking about


If you want to delete PWM you need 1 relay, use one of these two schematics...

near the transmission



near the PCM





If you want to keep the PWM you need 2 relays, use one of these two schematics


near the transmission




near the PCM




Is this the mod/writeup that Jake is pissed off about?
Old 03-23-2012, 05:41 PM
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Yes that is the mod to wire in a relay.
Old 03-23-2012, 08:57 PM
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Glad someone posted it back up.
Old 03-23-2012, 09:00 PM
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Originally Posted by BlackGMC
Actually Frost on Ls1Tech sells this plug-n-play harness...

TunedByFrost.com - Products
holy crap that's expensive. I got my Speartech conversion harnesses for $60. Any more than that and I would just do the 2 wire swap at the main connector.
Old 03-23-2012, 09:13 PM
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Originally Posted by GMCtrk
holy crap that's expensive. I got my Speartech conversion harnesses for $60. Any more than that and I would just do the 2 wire swap at the main connector.
This is the full harness to run the 4L80e on the 4L60e tune so it has the relays and everything. Yes it is expensive but it is a plug and play kit so not to bad. The pigtails are always $$$.

If you dont mind splicing the harness then just the 5$ relay is all you need and wire it up like the instructions.
Old 03-23-2012, 09:18 PM
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Originally Posted by black04
This is the full harness to run the 4L80e on the 4L60e tune so it has the relays and everything. Yes it is expensive but it is a plug and play kit so not to bad. The pigtails are always $$$.

If you dont mind splicing the harness then just the 5$ relay is all you need and wire it up like the instructions.
Ah, gotcha. In that case it's not bad then. I guess it really comes down to how much the unlocking of the converter bothers you.
Old 03-23-2012, 09:19 PM
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Originally Posted by black04
If you dont mind splicing the harness then just the 5$ relay is all you need and wire it up like the instructions.
Yep that is what i did, trans shifts just fine with the relay.
Old 03-23-2012, 11:06 PM
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So from what I am reading, there is no way in the tune to command the converter to not unlock below 5% throttle. Is this correct? Because I just had a segment swap done for a friend to go to a 4l80 tune and he is planning on stalling it soon. Looks like this is the better way to go.

Jake's performance, you talk a lot of s!@t, but most of what I've seen you say on this forum is just that. S!@t


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