Vehicle wont go into gear, no slipping grinding or noise, just sits there. fluid level good, clean. drove it 2200 miles the week before with no problems.
First we need to figure out what transmission you have. Crawl under the vehicle on the drivers side (be sure to chock your tires) and see if there is a black box on that side of the transmission. If so, then it is the 4L60E and there are many electronic parts that could be the culprit. Also while you're under there check and see if your shift linkage is hooked up, that will be on that same(drivers) side of the transmission. While your under there getting dirty, you could park the vehicle on level ground, chock the front wheels, jack up the entire rear of the vehicle and place it on jackstands. With the rear of the vehicle up in the air you could un-bolt the shift linkage and try to manually shift the transmission. If that works, you could have a broken shift linkage, or if you do have the 4L60E out may be that little black box where the shift linkage attaches to the transmission. Good luck and be careful!
SOURCE: 1984 c4 corvette/ trans problem
both modulator and needs serviced when servicing ck for debris in pan
SOURCE: 4l60e slips in 3rd and 4th
There are to many things that can cause this problem, best thing to is go get the ECM scanned for DTC codes at a transmission shop or Auto zone or Parts Source since they scan for free.
The ECM should have DTC code in it's memory on how the transmission is Performing and have the Transmission line tested for Fluid pressure.
Good luck and hope this helps. Oh and also ways check with more then on transmission shop if there tell you that you need a new Transmission,
It could be a simple as the transmission filter falling off causing the lost of transmission fluid pressure. Check the transmission fluid too.
SOURCE: 1988 TH400 won't shift correctly
You will need a good manual that is focused on the transmission and possibly someone to lean over your shoulder to help you. Clean workspace is imperative. These are rather easy as you are for the most part stacking parts back into the housing when reassembling it. I would say look for a yard trans to put in it meanwhile and then you can learn at your leisure.
SOURCE: 99 chevy lumina 94k mi transmission stopped working. Fluid good.
check fluid level, make sure proper fluid is in transmission otherwise take to trans shop to diagnse if level and type is correct(check at idle normal operating temp)
SOURCE: 2004 silverado tranny acting up starting w/ 2nd
Before guessing at transmission problems, check the fluid level (car
warmed up, engine running in Park on level ground) and have the PCM
scanned for trouble codes FIRST.
Also note that many problems that show up as transmission issues are
actually PCM or electrical, and may be external to the transmission.
Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a
local trans shop) on the pressure test port and go for a drive to
verify proper line pressure. Base pressure at idle in P,N,OD should be
around 70psi and around 140psi in R. Max line pressure should be at
least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure
is low, trans or pump is worn out. If max pressure is low, check EPC
solenoid. If reverse is slow to engage, and line pressure does not come
up to at least 130psi in reverse, replace the boost valve with a
Transgo 0.500" boost valve (easy fix in pan).
1-2 shift does not happen at WOT until you let off the gas: Best case:
try replacing the TPS. Middle case: leak in the 2nd gear apply circuit
(servo assembly or 1-2 accumulator). Double check by using the pressure
gauge and watch for a big drop when the PCM commands 2nd gear. Worst
case: poor line pressure rise.
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. Check the
yellow spring inside the accumulator housing for breakage. Also, if the
accumulator housing walls are scored, the housing must be replaced.
Easy fix in the pan.
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. If not, replace.
Soft shifting, gradual performance degradation: Poor line
pressure rise due to leaking boost valve, clogged EPC filter screen,
failing EPC solenoid, or worst case: leaky seals throughout. Transgo
HD2-C kit fixes first two without removing trans. Seal restorer may fix
last problem, but probably R&R. Also try a transmission flush with
BG brand products (Firestone stocks it).
Here are the common things that may be happening to your transmission to what you have described. As for your transmission fluid being burn, that is a sign that your transmission is slipping. Your going to have to service the transmission again fluid and filter changed. Since your doing that you may want to replace the boost valve and shift servo. I did mine on my 4L60E and have over 365,000 miles so far, replacing the boost valve every 60,000 mile and it's only $45.00 and take less the 5 min to replace and the servo is around the same price. I did do the upgrade and have the corvette boost valve and servo in my transmission which helps a lot. The other thing to is B&M has a electronic shift controlled modulator you can install your self which would give you 3 settings and works great with the upgrades mentioned above.
Good luck and hope this helps, keep me posted and try not to run the transmission too long with the burnt and dirty fluid. The dirt in the fluid will cause the electronic pressure control (EPC) valve to fail and will end up causing a $2,300.00 total transmission rebuilt over a simple $190.00 up grade and maintenance.
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