Superior 4l60e shift kit instructions
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This TransGo Reprogramming Kit includes valve body, servo, pump and accumulator components and modifications designed to deliver increased durability while providing firm shifts as well as a more efficient TCC apply. The 3-4 clutch plate failure as well as the 2-3 flare up complaints are caused by an inconsistent pressure boost and poor overall calibration of the shift accumulation system. The TCC slip code leads to the harsh 1-2 upshift as the ECM recognized the TCC slip and commands high line pressure to avoid further TCC slippage and damage. The torque converter clutch regulator valve bore is very prone to wear causing the TCC slip complaints and related code. Common complaints on this transmission are TCC slip or shudder, code P1870 or P0894, harsh 1-2 shift, double bump shifts, 2-3 flare up, burnt 3-4 clutch plates as well as inconsistent pressure boost problems. You dont have to get crazy with the vaseline either, just a dab to keep everything from moving will do.This 4L60E-HD2 Reprogramming Kit fits 1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E and 4L70E automatic transmission. Also the one checkball that goes in the case this will keep it up in there as well. This will help keep the checkballs in place while lifting the VB in place. When reassembling, you can use vaseline and apply it where the checkballs go according to the shift kit instructions. (again by the rooster comb).Be careful when pulling down the VB as there are check balls that will come down with it that is between the VB and case. Once you loosen the VB, you will have to take off the link to the manual valve. There is one small 10mm bolt that goes between the 1-2 accumulator and fluid indicator stop bracket. Remember this when you are reassembling to grab your 8mm's and surround the 1-2 accum. Before you remove all the bolts, you will see the 8mm bolts surround the 1-2 accumulator housing. There are three bolts with 8mm heads and the rest have 10mm heads. Again it is crucial you remember what bolts go where as there are different size bolts for the valve body. With all that happens inside a transmission its hard to tell whats gonna break first with all the variables for a failure. This will not correct breaking of input/output shafts, pinion failure, reaction sun shell breaking, ect. Again this is a process to help the longevity of the stock 60E due to the issues above.
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Now for those who ask "will my transmission hold up by doing this for so and so mods / horsepower?" There is not answer to that. This firms or quickens shifts by releasing and applying circuits more efficiently and reducing "overlap". As well as glazing/polishing the clutches, steels, drums, band, ect When you install a "shift kit" and servo upgrade you are positively modifying the valve bodies ability to apply and/or direct fluid to the clutch or band apply circuit. This generates heat and removes clutch and band lining at a greater rate. This is also happens on a downshift as well. So for the short time the transmission is in two gears at once they are essentially "slipping" as one or the other has not fully engaged. When your transmission is shifting into a higher gear, the lower gear has not fully released all the way. For example, when you ride your brakes while driving the pads will fail and wear a lot sooner and generate heat right? Take that and convert it over to what happens in a transmission. On a bone stock transmission, overlap is referring to the softness between upshifts (1-2, 2-3, 3-4) and also downshifts. The best way to describe this (at least that I can describe) is to use the word "overlap".