GreenZLT1

Hey everyone,

I'm having a problem with my 4L60E. The pump rotor broke last summer and everything was fine until then. Me and my buddy tore the whole transmission down and inspected everything. I never had a shifting problem before this and we rebuilt this trans the first time 2 years ago.

I do not have second or fourth gear now. It will go from first to third in (D).

However, if I shift manually, 1-2-D-(D), it will shift from first, to second, then to third, BUT, it only does this once in awhile. If I go and try it another time, it will never hit second. It will never reach fourth at all doing this way either.

Any pointers on where to start looking?

Thanks!

Rob

TxZ28Guy

I had a similar issue with my camaro same trans. I had no reverse. From what I researched before sounds like the sun shell

GreenZLT1

I have reverse

dmaderaitt

Just replaced mine, then tore the old one apart, and it was the sunshell that had went out, craked down the side and stripped on the inside, look it up on here youll find pics, on mine I lost reverse and nuetral like it was not going into gears properly and when it would shift it hit hard, then lost 2nd and 4th but got reverse and nuetral back.

GreenZLT1

I forgot to add, we just got done rebuilding this transmission and I have only a couple miles on it. We fully inspected everything, so I don't think it could be the sunshell. I'm thinking this might be a valvebody or servo problem?

dmaderaitt

Could aso be a solenoid.

12SCNDZ

You have an issue with the 2-4 band. Was the band burnt when you rebuilt it? Did you replace the reverse input housing? What kind of band did you use? It's either burnt or broken.

Frank

12SCNDZ

Yes, it could be a servo problem, but not as likely. The servo uses 2 sections. One to apply the band for 2nd and one to apply the band for 4th. I have seen the servo return springs fall out of place on install, and cause the servo to not apply though. Was your servo apply air check good when you put it together? Did the band hold on the air check?

Frank

GreenZLT1

Hi Frank,

The first time we built the trans 2 years ago, the band was replaced with a new one that was in my rebuild kit. I'm not sure if we replaced the reverse input housing.

This second rebuild we just fixed the pump that broke and tore the whole transmission down for inspection. The 2-4 band was still in great shape. Could the 2-4 servo on the side have anything do do with this?

12SCNDZ

LOL...Answered you before you asked^^^^

12SCNDZ

I've also seen band anchors break and the band rip the anchor lugs out. Did you built the trans with it standing up or laying down? It's also possible that the band wasn't fully seated on the anchor.

Frank

GreenZLT1

Nope, I don't remember doing an air check

GreenZLT1

The trans was built standing up. What's weird is that i can get it to sometimes shift into second when I manually shift it. Would the servo be a good place to start since it would be the easiest and we did not air check it?

12SCNDZ

You ALWAYS have to air check all the drums and the band when you build one of these things. You can try checking the servo. The path of least resistance is always the best place to start.

Frank

GreenZLT1

Well, I checked out the servo, everything looked good. I drove the car some more and it appears I only have second and third. Still no first or fourth gear. But here is the weird part, when the car has been sitting and I first take off, I hit first, second and third. No fourth. After this, the car only shifts between second and third gear.