⫷ 4L60e Harsh Shift, Shutter, 1 - 2 shift problems. 1-2 Accumulator Check and Replace ⫸

4L60E transmission has problems shifting into 1st or 2nd gear? Maybe your shift from 1st to 2nd is really sluggish? Maybe your Accumulator is the issue.

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4L60E series transmission have problems shifting into 1st or 2nd gear? Maybe your shift from 1st to 2nd is really sluggish? Or maybe you feel like you're towing when you're in first or second gear? What's the 1-2 accumulator going bad you can have many symptoms that can be caused by a defective piston in the 1-2 or 3-4 accumulator. I always recommend to replace the factory plastic piston with at least a OEM quality or design aluminum piston if you do not want to go over to the Sonnax pinless piston.

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[lashaunepeterson]

Your videos are so helpful!! I'm keeping my tahoe running with watching your videos. Thank you!!

[lilibethdoherty]

This is sad at 63K my 05 colorado bangs into second gear, while my 81 oldsmobile with 385K shifts perfectly!, they don't make them like they use to.

[nikkolaus]

Thanks for looking out for all us GM lovers worked like a charm for my 1999 GMC Yukon SLE changed accumulator and both solenoids😎👌

[testmcgee]

Still have a harsh 1-2 shift after accumulator work? Try disconnecting and reconnecting the wiring harness to the transmission to clean the contacts.

Also, if you are checking solenoid resistance, do it all the way from the ECM-side harness pins. This will tell you a lot. This is an end-to-end test. If the values aren’t good, disconnect the 13 pin transmission connector and check from the male pins on the internal wiring harness. The last place to check is by dropping the pan and checking the solenoids themselves. Good solenoids are useless if the wiring and/or 13-pin connector are bad or intermittent.

Please comment if this helps you!

[innovativeintelligence]

Ya my avalanche Trans lasted till 250, 000 with the hard 1 to 2 shift, That one was from GM. My Silverado is starting to get the hard 1 to 2 shift, I am going to put a Accumulator with metal parts. Plastic just does not stand the test of time, this helps alot, this part is not very expensive either.

[MrAnimalsrtasty]

Thanks for making this video. You saved me a ton of work

[treslongwell]

so don't worry about the 3-4 accumulator? I don't wanna drop the valve body. Scared to go that deep. The FWD one looks easy. Would it be dumb to replace just the 1-2 and FWD? Upgrading to pinless.

[ktotheswiss]

I had mine rebuilt, Top to bottom, it still slams like a shotgun from 1st to 2nd.

[tonyrich]

That stack up looked identical to the Transgo HD2 kit. The Electronic Pressure Control solenoid does need to be removed to replace the case electrical connector. Different.

[Beatvictor]

I've been working on LS1 firebird with a 4L60E and I've been having the issue where the car jerks when I put it on reverse or drive but after I run it for a while it goes back to normal. This video gave me hope to fix this issue so thanks for the tips!

[yourface]

1st is starting to slip like I'm on ice, does it need a rebuild? Or just an accumulator replacement?

[lnnn]

Good info. Thanks now i can fix my transmissions accumulator. 👍👍👍

[marcusambrester]

It looked like that accumulator piston did not even have a seal on it based on how easily it fell out of its bore. That was a reason for your harsh shift, the accumulator piston could not even do its job.

[robinturner]

Great video.In My 4L60e, in my 2000 Chevy s10, I was driving and noticed it slipping a little.All of the sudden it quit pulling.Like it went to neutral.Next day it worked until it got warm, then nothing.What you think.

[frankbatiz]

I follow your videos, I have do ne a lot of thing to fix my 1-2 hard shifting in my 05 suburban 4l60e. I have replaced the piston accumulator for the double O ring aluminum one and replace the pressure solenoid and I still have that hard shift from 1st to second. Also from park to gear . Need an advise please

[clintonadrian]

I have a 4l60e that has recently developed hard shifting from 1-2 and 2-3 also but only after I drive a few miles or after its warmed up a bit. I was going to replace the 1-2 accumulator but im thinking that might not be the issue given the 2-3 hard shift. Any ideas?

[mattwest]

mbw635
Scotties was spot on with the accumulator repair. My 2009 Colorado 2WD pickup was hard shifting on the 1-2 shift. I chnaged the trans fluid, sourced the AC Delco part from his link, Amazon prime shipped it next day, and the problem is gone. My bracket for the shift linkage was held on with two 13mm bolts, and the pan came free very easily. Gasket & Filter set I used was WIX. Thanks Scotties!

[snapap]

Like your videos. I hope youre still replying. Are there any differences with this part, between the shallow and deep pans

[juliotorres]

I did have A 96 chevy with A 4l60 that had A p0748 code pressure solinoid. But it was the PCM that caused the hard shift from 1to2nd gear

[Javelino]

Can the 1-2 accumulator resolve a delayed 1-2 shift?