The more rotating weight a transmission has, the more HP it takes to turn it, which equates into a slower car. The idea of an automatic transmission in that application is to keep rotating weight inside the transmission as low as possible. Many of my customers are drag racing their cars. So, maybe you just want the reassurance that they might be better and you don't mind spending the extra money? Let's talk about their drawback.Weight! The 5 pinion front and rear planets are substantially heavier than a 4 pinion. I ve seen the pins (axles) for the pinions fall out, I've seen the pinions lock up, and I've seen the housings shatter. I've seen these 5 pinion planets fail in as little as 500 miles. To complicate things, MANY 4L60E builders started installing "Off brand" planetaries. 4 and 5 pinions both use a similar fixed needle bearing set that the rear sun gear rides on.Ī true GM 5 pinion rear planetary sells for near $400. The largest percentage on the time when one fails, it because of an associated needle bearing set failing and shedding needles through the pinions. Planetaries are not a high failure area in a 700 or a 4L60E. 4 pinions have been used since 1982 in the 700R4's, and remained the same planet until the 4L65E. In reality, there's been no real proof that 5 pinions is any stronger than 4. Many "builders started using them as a selling point. Suddenly, everybody thought they were a necessity. I base all these findings on 21 years worth of transmission building experience, as well as the fact that I have 4L60E's doing some pretty incredible things, and being able to last.ĥ PINION PLANETARIES: 5 pinion planets first came out in the 4L65E. I'll talk about 5 pinion planetaries, Trans Go shift kits, "Corvette" servos, sleeved input drums, Alto 9 disc 3-4 clutch packs, as well as many other parts that either don't help or hurt these transmissions. I'm going to add installements her and explain the problems that certain parts create, or why they're useless. Very often, these parts are nothing more than a waste of money and in many cases actually hurt the performance and durability of a 4L60E. A new part is introduced and touted as being the "fix all". Unfurtunately, the aftermarket industry is filled with "buzz words" and "smoke and mirrors". Many times I have to educate customers or potential customers about why I don't use certain parts. I get asked quite a bit if I use this part or that part in my 4L60E builds. Calibrates 3-4 Clutch Feed Orifice Without Creating Shift Concerns.Stickied: The truth about many "Upgrades" and "Performance" parts for 4L60E's.Provides Sufficient Exhaust So That 3-2 Downshifts Are Smooth.Improved Design Meters Servo Release Oil, Reducing 3-4 Clutch Failure.Sonnax Has Now Developed A Unique Solution That Combines An Orifice With A Ball Check Valve And Solves These Problems. The 3-4 Clutch And 2nd Gear Band Are Not Properly Synchronized. Inadequate Metering Of 2nd Gear Band Servo Release Oil Causes 3-4 Clutch Failure. Since The 700-R4 Transmission Was First Introduced. They Have Been Trying, With Limited Success, Technicians Would Like To Find A Way To Successfully Extend The Life Of 3-4 Clutches, And Improve The 2-3 Shift Feel. This Part Combines An Orifice With A Ball Check Valve To Meter Servo Release Oil.
Inadequate Metering Of The 2nd Band Servo Release Oil. Note: This "Check Valve Must Be Used With The OEM Valve And Some Drilling May Be Needed. GMC Chevy Buick Cadillac Pontiac Oldsmobile This Check Valve Will Fit These Automatic Transmissions (1) One Sonnax 77701-076 Check Valve Kit Only Southeast Worldwide Manufacturers - SEAħ00 700R4 4L60 4L60E 4L65E 4L70E New Sonnax 77701-076 Servo Release "Check Valve".LUBEGARD® International Lubricants, Inc.
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