Upon the invention of multo disc lock up clutches in the converters, some people seen these drums fail in that spline area. The drum is splined and the input shaft is pressed into it. SLEEVED INPUT DRUMS: The 700/4L60E is "blessed with a cast aluminum input drum. They need efficient transmissions that can best use the HP they have. They're not trying to overcome a poor transmission build with HP. I have a customer with "bolt On" LT1 F-Body, running 11.56 and one with a Bolt On LS1 F-Body running 11.0.
I also try to build a very efficient transmission, as well as a strong one. Installing 5 pinion planetaries will slow you down and have no real strength benefits. 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. Stickied: The truth about many "Upgrades" and "Performance" parts for 4L60E's
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