4l60 (not E) issue NO 2ND or 4TH DOES HAVE REVERSE!!

[9302z28SS]

so today I had a cammed 99 z28 pull up next to me at a light, it turned green and we got upto about 25 maybe 30 mph, then we both floored it, my car downshifted and took off (I won surprisingly) but now I have no 2ND gear and no 4TH gear, tried to shift manually wont take 2nd but will go right into 3rd without issue, I do still have very very strong reverse, no other gears slip or have an issue, when driving in overdrive it gets to 2600RPM and jumps into 3rd, and no matter what I do it wont go into overdrive, (think it might have once but unsure) checked the fluid, its not burnt, or smelly,haven't done anything further besides try to adjust the kick down cable and that didn't do anything besides make my car try and shift higher, any ideas? read up on it some say it could be the 2-4 band? or the sun shell? If so ill just tear into this trans and replace the band and sunshell if I can, maybe even throw in a shift kit while im in there

[hoogiesngrinderz]

probably burnt up the 2-4 band

[9302z28SS]

figures, this trans was just rebuilt too, too bad its out of warrenty, got any links to where I can get a new 2-4 band? and maybe a teardown link?

[9302z28SS]

found this

found this on an s10 forum for the 4l60E same thing that's happening to mine No 2nd or 4th gear. 2-4 band is slipping. Servo seals may be damaged (can
be fixed without removing trans. Otherwise, 2-4 band is worn out. R&R.

[hoogiesngrinderz]

any trans shop will have them, you can find them all over ebay as well.

If your reverse drum wasn't replaced during the last rebuild then you shouldn't use a wide band. The couple rebuilds I have done got a new reverse drum, a wide Alto Red band (I don't like Kevlar bands) and a Corvette servo. Seems to be a good holding 2-4 setup.

You will need pull the trans for this fix. When it's on the bench, remove the pan/filter/valve body to remove the holding pin for the 2-4 band. Watch out for all the check balls. Make note of where each valve body bolt came from, one bolt in the wrong spot will lock up the sun shell or low/reverse piston. Don't ask me how I know

Next you will need to pull the 2-4 servo in order to release pressure from the apply pin.

Now you pull the pump. You should be able to pull the band out from around the reverse drum. Might as well pull the reverse drum at the same time to check the wear surface with a straight edge, old ones are often noticeably worn in the center of the band contact area. Be careful of the teflon rings on the stator and input shaft. Check for wear on the stator and reverse drum bushings.

[9302z28SS]

this isn't my first rodeo with the 4L60/4L60E transmission(s) ive been in these transmissions plenty of times, glad I understand exactly everything youre saying, lol. didn't know a trans shop would sell you just the band, awesome info, im kind of excited to do this, although I know ill be cussing up a storm while taking out the transmission and valve body, but for some reason lately ive been really excited to work on my car, finally progress..

[SOPES]

sometimes the servo could be bad for the application of the 2-4 band drop the pan just to verify first but yeah def 2-4 band related. you may need the drum too that the band holds

[9302z28SS]

hopefully not, now one thing I don't know how to do is to check the 2-4 servo by dropping the pan, can anyone help me out on this????

[SOPES]

Its hard to really explain but its toward the front of it, Im gonna try to find some pics for you

[9302z28SS]

alright thanks mike, ill check back in a few for the pics,

[FASHOOTER]

Nice Kill

[hoogiesngrinderz]

2-4 servo isn't in the pan, it's on the passenger side of the transmission just above the pan (circular cover, held in by large snap ring)

[9302z28SS]

[MENTION=2913]FASHOOTER[/MENTION] you mean the trans or the ls1? Lol.

At the cost of a 2-4 band and a weekend project it was worth it

[FASHOOTER]

Always a good time taking down the mighty LS.........

[9302z28SS]

pulling the trans tomorrow or tuesday, hopefully i didnt fry the 2-4 clutches, oreillys had a stock band in stock for 27 bucks then paid another 3 bucks for a front pump seal, where can i get a valve body gasket locally?