Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmision is either in limp-home mode or has lost electrical power. Servo seals may be damaged (can be fixed without removing trans. Try not to run or drive the car or further damage could result.ĩ. 1st and 3rd only, no 2,4 or R sunshell is fractured or splines are sheared off.
Try not to run or drive the car or further damage could result.Ĩ. Sudden grinding noise with no prior warning primarily in 2nd gear, behavior in reverse may be abnormal sunshell is fractured. The car is safe to drive (in 2) until you can get it fixed.ħ. No 3rd or 4th gear: “3-4” clutches are worn out. Easy fix on rear of transmission, but xmember must come out to access VSS.Ħ. Trans does not upshift out of first, speedometer reads zero at all times: VSS failure. 1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. Also, if the accumulator housing walls are scored, the housing must be replaced. Check the yellow spring inside the accum housing for breakage.
#4L60E SHIFT KIT INSTALLED NO REVERSE CRACKED#
1-2 Shift shudder at WOT delayed or abnormal 1-2 shift There's a problem ONLY on the 1-2 shift: 1-2 accumulator piston cracked or stuck cocked in the bore. Worst case: poor line pressure rise (see below).ģ. Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. Middle case: leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). 1-2 shift does not happen at WOT until you let off the gas: Best case: try replacing the TPS.
May also have worn boost valve (can replace in the pan).Ģ. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the trans may help (must remove valvebody), or adding a high-viscosity additive such as Lucas Transmission additive or other seal restorer product. Slow, slipping or no reverse: “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. However, I found this awesome write-up on 4L60e tranny issues! Possibly sticky worthyĬommon failures on 4L60E, symptom any possible repair:ġ. So with that said, probably isn't the OP's problem. All in all you will be replacing your old wornout parts with quality parts that will last and last.Isnt if the tranny is sent to limp mode the transmission defaults to either second or third gear?I think you have reverse and 3rd only, but can shift into second manually. The Friction module is made by either Borg Warner or Raybestos, both OE manufacturers of friction material. It contains all the gaskets, seals and sealing rings for your rebuild. This is the most complete overhaul kit you can buy. The overhaul kit is made by Precision International an OE supplier of overhaul kits. Need to do a complete rebuild? 1993 to 1997 Super rebuild kit or 1998 to Present Master overhaul rebuild kit is a complete kit that gives you everything you are going to need for your rebuild. 1993 to 1997 overhaul kit with frictions or 1998 to Present overhaul kit with frictions is a nice kit to freshen up your transmission.
Friction material, Steel plates, band, all hard parts but you want to replace all the gaskets and seals to freshen it up. So you take it apart and everything looks good. Performing a complete rebuild of your 4L60E or just freshining it up, you need the right kit for the job. Hopefully this repair while a little time consuming will solve your problem saving you thousands on a rebuild. The second involves the installation of a Transgo Shift Kit You will only replace the accumulator springs and not internal parts since you are not rebuilding at this time. The first involves removing the side cover and replacing the solenoids with approved and updated ones. You can choose one or both repairs to try and save your ailing transmission. The springs to control accumulator travel where weak and also caused sloppy shifting. The other problem was in the accumulator area. It had a tendency to gunk up and cause low pressure that in turn caused soft or sloppy shifts. GM had a problem with the EPC (Electroinic Pressure Control) solenoid. If everything looks good, you may be in luck. The next step is to drop the lower pan and make sure there is no excessive debris on the magnet or in the pan. You are looking to see if it still looks relatively clean and does not have a burnt smell. The first step is to carefully examine the fluid. If your 4T65E transmission slips when shifting or is exibiting soft or lo-o-o-ong shifts, It may not be too late.
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