BUILD A RELIABLE 4L60E TRANS FOR UNDER $100!

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$40 corvette servo
$60 in dexron 6 ATF
Or the expensive route and tune it for $500.

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These transmissions are incredibly reliable with stock to mild engine power levels. That's why GM started using them in the 80's under the name 700R4 and continued on for decades afterwards. They simply work. Over the years they saw many subtle improvements and were rebranded as 4l60 and later the 4l60E. Add superchargers like I see on your truck or other big power items, they aren't gonna last as long. The Corvette servo only helps raise the pressure on the 2-4 band, meaning only 2nd and 4th see a benefit. It doesn't correct the other weak links inside the transmission such as the sun shell. There are kits out there that replace those so they hold up under more power. The reason they get a bad name is because of people who don't read the owners manual and try towing in OD. These are designed to be placed in 3rd under heavy load, otherwise they can potentially destroy themselves in mere minutes. If towing in this manner, they will operate as intended for years. Please note, the fluid and filter should be changed at regular intervals regardless of power levels(15-100k miles depending on the year). My personal recommendation is 50k maximum between changes, even in the Dexron 6 era, particularly if the vehicle is driven hard. Also, not all 4L60's were designed for the relatively slippery, synthetic dexron 6. Adding dex. 6 to a 4l60 that was meant for Dexron 2 or 3 is going to lead to more clutch pack wear. You wont even notice it's happening until your next fluid change interval and you see how dark the fluid has become and how much excess debris has stuck to the magnet compared to previous fluid changes. If you don't believe me and still want to change from earlier non-synthetic dexrons to the newer Synthetic Dexron 6, then you'd want to do a full flush to clear out the old fluid. The pan/filter swap only replaces(IIRC) 4 quarts but the torque converter, valve body, oil pump, clutch packs, case, etc combined all hold just as much. Plan on buying 12-14 quarts for a thorough flush because its a process of dilution to remove the old fluid, rather than a straight drain and refill. This ends up costing more than $60 and is tricky to do without shop equipment, though not impossible.

BobDole-ym

It's best to change the boost valve to a .500 snd a Vette servo swap..a transgo kit also helps tremendously. Im running 600 dyno hp on a 383 Chevy with this combo. Its stsyed together 7 years and counting.

thecarguy

New subscriber!!! Just because you shared your tune with us jk 💪🏿💪🏿💪🏿😂😂😂

papergatorzfedducca

I saw somebody else's video and they did the Corvette servo but they also change some valve thing with Springs like a cylinder about the size of your finger. They call it a mod two, cheers Graham

theaussienurseflipper.

I have several Chevy trucks with the 4l60 thanks for the knowledge

dameonwilliams

Nice video, great info..the info on the line preasure is great, what kind of supercharger? And how much did u give for it? And it be a cool video on install of one, with part numbers...thank you

JoelCardenas-nxvs

I love the stance on your truck. Looks close to stock which is what I wanted to maintain. What suspension do have, or did you have at the time of recording?

eboer

why that servo vs the one with the 6 tabs? which supposedly has more holding capability? I'm still researching the subject and just haven't come across the info yet maybe... Is it because you already have the software mod, so the other one isn't needed?

mekial

No in stock form behind a stock LS those transmissions are good for 2500, 000 Mi plus. The problem is with minor bolt-ons you can easily send the power will passed its rating. Attuned 4.8 with mild Cam and good headers will hit 450 horse 420 torque, a 5.3 easily goes 500. And since the 4L80 and the 6l80 are so much larger and they don't fit well behind some of the smaller transmission tunnels in a retrofit you pair of 6.o with minor bolt ons and a 4l60 and full send you get transmission salad.

williambecker

Why change to the servo if you're pumping up the pressure through the program?

moabman

Which way you turn that pressure valve? Righty tighty or Lefty losey?

dhecht

Is that literally all you have done to the transmission? My truck has 215k, bone stock right now and plan on throwing boost at it eventually. Wasn’t sure if I should just go ahead and build it out.

adenjordan

Do u get belt slip and if so how do u eliminate that . I went with an rpm belt and changed out the top pulley with a griptec supercharger pulley it was supposed to bite on the belt better but I still get belt slip ? Any tips???

eddievazquez