4L60e core/year choice.

Transmission to Rear-end

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dfarr67
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4L60e core/year choice.

Post by dfarr67 » Fri Dec 08, 2017 12:57 pm

Have a 1989 K1500 I will be upgrading the ecu (for various reasons) to a 0411 unit, the 700r4 has served me well as it is a good build and I know how not to treat it- a 4L80e requires too many supporting changes- is it just internal parts upgrades (as I'll be meeting at least the 4l65e benchmark) between a one piece 1994 or a two piece 1996, I know the PWM difference and converter clutch material.

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Re: 4L60e core/year choice.

Post by ingram » Fri Dec 08, 2017 5:08 pm

The 4L60E, 4L65E, and 4L70E are all basically the same transmission with the internal components being stronger and designed slightly different to handle more power. The 300mm converter uses a longer bellhousing, input shaft, and stator shaft. The transmission will be around 1/2-inch longer.

Just like computer controlled engines, the electronic transmissions will need the proper computer to operate correctly. This power control unit (PCU) will be something you must purchase. They are not cheap. If you are not planing to update your engine along with the transmission, you might want to research this project in detail before committing. Anything can be done, all it takes is time and money. :)
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dfarr67
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Re: 4L60e core/year choice.

Post by dfarr67 » Fri Dec 08, 2017 6:08 pm

I'm pulling together parts right now. I do have a couple ecu's and harness's. For the trans I would stick to the SBC gen1 models up to 1998 5.7L vortec. I think the two piece case has a slight variance in length where the one piece should bolt direct to what I have. If it really is 6 of one half dozen of the other I'll look for a one piece case, I don't want to get into conversion converters either. I think that although the 0411 is for PWM transmissions you can set it to mimic the on/off lock up of earlier ecu's.

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Re: 4L60e core/year choice.

Post by ingram » Fri Dec 08, 2017 8:03 pm

1995 was the first year for the PWM TCC solenoid. 1996 was the first year for the 2-piece case. There are also some 1996 one piece cases. It sounds like a 1995 or 1996 one piece case will be your best choice. The PWM TCC solenoid is an on/off design for those years. Good luck with your project. Keep us updated.
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Re: 4L60e core/year choice.

Post by dfarr67 » Mon Dec 11, 2017 6:32 pm

So I might have a line on a 1999 OBS trans. Wondering how to make the truck column shifter work with the newer cable.

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Re: 4L60e core/year choice.

Post by rfoll » Tue Dec 12, 2017 8:30 pm

What is it you are trying to gain over your present trans? The E transmissions add a lot of complexity. Does your new ECU require it?
So much to do, so little time...

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Re: 4L60e core/year choice.

Post by dfarr67 » Wed Dec 13, 2017 10:23 am

Well that's a good question, plan is using a 0411 to go with LS coils. 700R could be standalone with vacume switch lock up, in my mind it would be simpler to let the 0411 control everything instead of grafting and/or sharing sensors.

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Re: 4L60e core/year choice.

Post by pdq67 » Thu Dec 14, 2017 8:14 am

IMHO, A good old-fashioned, "MUNCIE", with a floor shifter solves a lot of problems.

You want OD type rpm's, then swap out the rear end gears to something like a 2.76 or 3.00 or so.

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Re: 4L60e core/year choice.

Post by dfarr67 » Thu Dec 14, 2017 9:19 am

This is a 4x4 application which makes it a little more complicated- was going 4L80e and have a core but lots of details like driveshaft lengths, transfer case input change, etc. This truck has gone from 3:42-4:10-3:73 not changing again, I have no issues with rpms at the moment and the 4l60e won't change that.

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Re: 4L60e core/year choice.

Post by rfoll » Thu Dec 14, 2017 9:45 am

pdq67 wrote:
Thu Dec 14, 2017 8:14 am
IMHO, A good old-fashioned, "MUNCIE", with a floor shifter solves a lot of problems.

You want OD type rpm's, then swap out the rear end gears to something like a 2.76 or 3.00 or so.

pdq67
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Re: 4L60e core/year choice.

Post by dfarr67 » Thu Dec 14, 2017 10:35 am

If I wanted to row gears- it would have to be a trans that came with the GMT400 body.

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