#2004 4l60e servo assembly location install#
#2004 4l60e servo assembly location manual#
#2004 4l60e servo assembly location mods#

(2) limited 3- 4 clutch torque capacity, (3) 3- 4 snap- ring blow- out, (4) input housing breakage near the input shaft spline, and (5) input housing fatigue failure.įlexing/bowing of OE and other aftermarket backing plates is eliminated with Sonnax’s heavy duty bolt- on anchoring plate. Keeps engine in power band on 1- 2 and 2- 3 shiftsĪllows longer pull in first and second gearsĤL60, 4L60- E, 4L65- E, 4L70- E input housing: (1) flexing/bowing of the 3- 4 backing plate, Six- pinion design with advanced durability features Lube channels direct oil to the pinion pins and the unit can be disassembled for inspection and service. This high- quality carrier has several advanced design features: the gears are precision- ground to OE standards, thrust washers are highly wear- resistant PTFE- coated material and the captured bearing is thicker late design. This keeps performance engines in the optimal power band while allowing a longer pull in first and second gears, improving consistency and performance. The Sonnax 2.84 input carrier kit 77284- K changes these popular units from a 'wide ratio' 3.06/1.63 to a 'close ratio' 2.84/1.55 configuration with more desirable RPM drop between 1- 2 and 2- 3 shifts. The shift from 3.06 ratio (first) to 1.63 ratio (second) is a dramatic ratio change, allowing engine RPM drop that results in performance engines falling out of the optimal power band.

You dont have to get crazy with the vaseline either, just a dab to keep everything from moving will do.The steepest first gear ratio of any four- speed automatic (3.06) belongs to the GM 4L60/E family of transmissions. 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.

#2004 4l60e servo assembly location manual#

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.

#2004 4l60e servo assembly location mods#

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'.

#2004 4l60e servo assembly location install#

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'.