4L60E Stuck 1-2 Accumulator Shift Valve 

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Thanks!

Its awesome that you answer every comment. Thanks for helping everyone out. I have a 99 silverado. Its having a delayed shift when going into second. Whenever I'm very light on the throttle there is no problem and its shifts fine. But during normal driving it doesn't shift into 2nd until around 3000 to 3500 rpm and sometimes I have to let of the gas a bit for it to shift. This only happens when going into 2nd, all others seem to be fine. I was thinking of changing the fluid and filter and replacing 1-2 solenoid. That do you think. Thank you in advanced

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Good video. Hava an 2002 gmc 4.8L vortec. Seems like shifts from 1st to 3rd what could this be? All other gears shift fine

Awesome work! Working with a LS1 4L60E here. I have an erratic hard shift to drive and erratic 1-2 hard shift. I replaced the accumulator with a pinless version and the problem still remains. I plan on inspecting the check balls is that good suggestion or do you suggest differently?

Thank you for posting this. Would it be possible to change the 1-2 shift valve without removing the valve body?

Got a 1996 GMC Jimmy with 4l60e. When you start it up first thing in the morning, all gears work fine except reverse. It won't engage reverse until the truck reaches operating temperature, about 5 to 10 minutes. Then reverse is fine and all gears shift perfectly all day until the next morning when the same thing happens all over again. Any ideas what it could be? Thanks. Really like your channel.

I have a 4l60e that started out as just a hard 1-2 after a rebuild, then went to a late 1-2 shift then it went to all that plus no wide open shifts. Could it be this valve stuck? Ive messed with going from the superior servo back to a vette servo, then replaced both shift solenoids, looked at second accumulator, and even double checked pressure with a tester. Now with the vette servo in it it slips 1-2, this valve is the last thing left.

Hey Tom I got a 2000 4l60 in a 4cyl s10 pickup. About a year ago 1st gear started slipping, kept driving now 1st gear is gone. No movement whatsoever. Reverse works fine and holds strong. All other gears work. Fluid level is fine, the only problem I can detect in the valve body was the accumulator had only one spring, when my service data shows 2. Im not sure if that was part of a rebuild/update, as it worked just like that for 40k miles. No codes. Just looking at the on/off values for the shift solenoids, they appear to be working. Any tips? Am I correct in thinking 1st and reverse are the same clutch?

Hello my4l60e is high stalling first gear. Changes into 2nd and 3rd fine. 4th gear doesn’t engage at all. Where should i look? Thank you in advance.

I have a 03 avalanche. 1st gear revs out. I have to let off to get it to shift. 2nd gear is like neutral.. I can get shifts from 1 to 3 and it goes into OD. The only problem seems to be with 2nd gear. What might cause this?

i have a 4l60e 1995 works great and shifts are quick and normal. Problem is that 1-2 and 3-4 shifts are delayed RMP wise but dont bang in. Still shifts smooth. Any ideas. Has all pinless pistons

Hello- What would the symptoms of a problematic 1-2 accumulator shift valve include? I'm struggling with a slide-bump 1-2 shift, when all other upshifts shifts seem to be fine. (downshift wise, 3-2 seems like it could be soft but i'm not sure how soft it is supposed to be). 1-2 accumulator itself seems to be ok- i see some wear marks in the bore, but nowhere near scratches i can feel with a fingernail. The wear marks make it appear the piston strokes the full length of the cylinder. When i compress the spring/piston assembly and cover the hydraulic connection, the piston stays in the same place / air doesn't appear to leak in quickly. The springs are green/green, which align with the GM parts diagram for this application (2003 chevy astro awd). It appears from the hydraulic diagram that the 1-2 accumulator shift valve also provides accumulator pressure for the 3-4 accumulator, is that correct? I haven't notices any 3-4 shift issues, but maybe i haven't noticed soft 3/4 shift because i'm rarely at full throttle 3-4? From what i've read, it seems like i'm getting accumulator pressure bleed-off, or low accumulator pressure, allowing the piston to stroke too quickly and hit the end of travel causing the bump. Low accumulator pressure could be from low line pressure, low torque signal pressure Low line pressure could be a number of sources, but i think would cause other noticeable driveability issues Low torque signal pressure could be bad throttle position sensor, or problem with the pressure control solenoid. However all other shifts appear to work well, and the pressure control solenoid feeds the boost valve, so i don't think it is that. And otherwise the car seems to drive fine, so i don't think it is the throttle position sensor. I have not checked line pressure.... and now the transmission is out of the vehicle :-/ . Thoughts? What am i missing/ what did i get wrong here? Many thanks!!

I have a 4l60E that has reverse but it seem like it has no detent lever from park to 2nd but once it is in second my scanner says it's in 4th gear. I was wondering if that could be a stuck valve in the valve body or a broken or stripped detent but that wouldn't explain the looseness of the detent not having the feel of each gear placement in the shifter handle. Have you ever heard of anything like this? Would the pillow switch be the problem sending bad info back to the ecm on this 1998 k1500

I have a 4l60e that has a slam into 2nd I have replaced valve body 1-2 accumulator the boost valve and pressure regulator valve checked trans pressure its good what am I missing

I have a 94 subarban that has no 3rd or 4th but I have changed silanoad a&b and still nothing any help will be appreciated

I have an 06 4l65e that seems to have 1st and 2nd but slips around the time it should shift to 3rd but will make the shift if I lift off the accelerator pedal and then I take it to 55mph and it seems like it will not shift to 4th. Do you have any ideas of what it could be?

Which side faces up? Also need some advice is there an email or number to send you these images a scratch on my valve body wondering if it is ok it's on edge of wall on wormtrack.

I have a 4L60e transplanted into my Corvette C3. I am running a manual shift setup MPS signals engage relays to activate the solenoids when commanded by shifter position. Problem is I have no first gear. Trans was a rebuild about 2 years ago they rolled the surburban it lived in shortly there after and it sat until I swapped it. MPS is closing and commanding both A&B to close for first but it just stays in 2nd. 4th is fine and both solenoids are good. When I found out I had no 1st I pulled the pan again and swapped the 1-2 accumulator housing and all, from another parts tranny that I had. My accumulator seems good, nice strong spray when you squeeze it. Fluid in this trans was as clean as I have ever seen in a transmission no clutch material or anything in the juice, only a very light coating on the magnets. Could this valve be just stuck from sitting?

I have a problem with the 2006 4l60... sometimes it won't shift from 1 to 2 it goes to neutral to temporarily fix this I need to come to a complete stop then place it in park then back then to drive then she is fine for.... awhile ...any ideals thanks

Hello. I have a 4l60e that starts on 2nd gear only 3-4 are fine

My 4 to 3 valve is stuck.. Cannot seem to get it out. It moves but seems caught up on something.

My 1-2 shift solenoid has gone out twice now will only go down to 2nd gear all others are fine

I have a 1999 silverado 1500 with 5.3/4l60e combo,it stopped shifting into second gear so i took it in for a trans rebuild. I got the truck back from the shop,and it seemed to shift fine until a couple weeks later it had no second gear again.tool the truck back to the shop and the mechanic tells me that the transmission went bad again,and claims it is the tps fault… i payed for them to replace the tps but the code p0121 is still present…. Is this something common or even possible? Any input or help is highly appreciated!!! Thanks in advance.

I fixed a 4L60e on my truck and it only shifted when I let off the gas, could it be one or more valves stuck? You hace a new follower ;) thanks

Hey man, I have an 02 Yukon Denali with a 4l65e and it takes off in 3rd, but you can manual pull it down into 2nd. It's not showing any codes and I made sure that I was getting 12 volts to the pink wire (pin E) on the gray connector that plugs into the transmission. I had a 3-4 clutch pack go out in my original transmission, so I bought a rebuilt one and put it in and now it's doing that. The original transmission was acting fine. Do you think that it could be a stuck 1-2 shift valve in the rebuilt transmission? Thanks.

What are the symptoms of that valve being stuck? I had a 4l60e stuck in first. Replaced the valve body and now its working again. Is that what was wrong with the valve body possibly?

Im having problems with My 2002 s10 has a p0756 code when i start driving it feels like it's in second gear it shifts up fine but when i come to a stop an start again it feels like it's in second what can it be thanks

4l60e shift 1st too 3rd missing 2nd And 4th gear smoking the band and low rev. Drum all replaced nshifted fine through all?gears atleast twice

Have an 04 trailblazer 4.2L. After dropping pan and replacing with oem filter w/ 145k miles for the first time since buying it new. 1-2 shifts firm when cold and then smooth out in a few mins of driving which I guess when warmed up. But doesn’t shift 1-2 firm when very lightly giving gas. Only when you give normal gas at green light. Is this normal? Wasn’t doing that before.

On my 4l60e It wont shift up out of first but it has reverse and all just wonder if you would know

My 4l60e has 1st and reverse wont shift into 2nd and it’s had problems with the neutral safety switch connecter In the past any idea?

How could you tell it was stuck by looking at it?

What would this cause in a transmission?? Loss of first gear?? 2nd gear starts??