4L80E conversion

[Heavymetl]

The way the trans shifts really is fairly simple, electronically speaking anyway. 2 solenoids, powered by 12v, and just a combo of grounds to activate.

1st Gear: Sol A: GND. Sol B: No GND.
2nd Gear: Sol A: No GND. Sol B: No GND.
3rd Gear: Sol A: No GND. Sol B: GND.
4th Gear: Sol A: GND. Sol B: GND.

You'd think it would be cheaper for someone out there to devise a raspberry pi circuit board or similar to get the "computer control" done on the cheap.

[Bigdav160]

You would still want to control pressure. That requires more current than a arduino or raspberry pi can handle. Still, someone savvy enough could probably do it.

[davepl]

Originally Posted by Heavymetl

You'd think it would be cheaper for someone out there to devise a raspberry pi circuit board or similar to get the "computer control" done on the cheap.

A number of people have. Then, to make a living, they put it in a box, got marketing materials made up, and charge $600 for it.

That's all the ones out there now are, little integrated microcontrollers. But someone has to figure out how to make it all work, produce the product, and that's the price point the market has set so far.

If you could make one for $10 and sell it for $200 you might move a few copies, but I bet the support would be a nightmare.

[46stude]

Originally Posted by GR8-68

Also found this controller on ebay for 475.00

atcFOUR controller

I looked into the one they sell for the 4L60e before buying the TCI unit. My problem w/ the atcFOUR was I couldn't find any reviews anywhere from actual users. I don't know if they're just a new company or what, but decided to spend the extra on a product that was more established.

[GR8-68]

Originally Posted by 46stude

I looked into the one they sell for the 4L60e before buying the TCI unit. My problem w/ the atcFOUR was I couldn't find any reviews anywhere from actual users. I don't know if they're just a new company or what, but decided to spend the extra on a product that was more established.

I have to agree with you on this, I also done more research after posting this and could not find a whole lot of stable reviews or additional information, I am more than likely going to go with the tci myself

[dirtyjim]

there are several manual control boxes available for anywhere from $125 to $400. or just search the transmission section on yellowbullet for manual shift wiring and the actual manufacture of the boxes explains how to do the wiring at the pressure manifold and plug to make it manual shift for free while you are saving for a transmission controller

[bowtie72]

Has anyone used US Shift? They have everything you need to get started. They don’t address the speedo.

[kwmech]

I got a US Shift for my 91 Suburban conversion. (which has an electronic speedo) Still in the process of installing. Just had the d-lines redone. The US shift does have an option for electronic speedo calibration which I'll be using since I did an axle and gear swap with larger tires. I try to remember to keep this updated as things progress in the next couple of weeks

[KyFarm]

has anyone put a 4L80E in a K10. I really want to get rid of my TH350.

Maybe someone knows of a thread that addresses the issues associated with the transfer case and the bigger transmission.

Thanks

[Bones72Super]

Originally Posted by KyFarm

has anyone put a 4L80E in a K10. I really want to get rid of my TH350.

Maybe someone knows of a thread that addresses the issues associated with the transfer case and the bigger transmission.

Thanks

Advanced Adapters makes a kit with the T-case adapter/mount and 32 spline female input shaft and bearings for around 600. Then you still have to get your T-case machined to accept the larger bore of the input shaft and bearings.

I will eventually be putting a LQ4/4L80E in my 72 K2500. I got super lucky and found a 205 from a 80's square body that had a th400 that a friend of mine has had in his shop for decades.

I plan on keeping the T-case in the stock location so I don't have to change drive shafts and let the engine/trans move forward a bit

[KyFarm]

Originally Posted by Bones72Super

Advanced Adapters makes a kit with the T-case adapter/mount and 32 spline female input shaft and bearings for around 600. Then you still have to get your T-case machined to accept the larger bore of the input shaft and bearings.

I will eventually be putting a LQ4/4L80E in my 72 K2500. I got super lucky and found a 205 from a 80's square body that had a th400 that a friend of mine has had in his shop for decades.

I plan on keeping the T-case in the stock location so I don't have to change drive shafts and let the engine/trans move forward a bit

Thanks for that. I'll check out advance

[kwmech]

Found this out yesterday while working on my conversion. The starter is different with the 4L80e.. The bell of the trans is not larger enough for the nose cone of the stock starter in the 91. Got a starter for a 95 which bolts up after you locate the proper length bolts which are shorter. Had to lengthen the shift rod from the column by about 2''. Had to lengthen the t-case shifter rod by the same. Working on the strut from the bellhousing to the t-case now. Still have the wiring to do. X-member was moved back 3-1/4 inches. Looks good so far though.