4L60E........no 3rd or 4th Gear
12-02-2005, 09:18 AM
#13
You need a tech 2 or a shaffer shifter to see if you can manually command those gear changes.Did you do a manual gauge?Although it sounds like main line is OK.Did you look at a fluid schematic?See what the common thread is for 3&4 fluid application.Any problem with the wiring connector? Any pins bent?Are you sure you have the right VB gaskets? compare to the old ones,did you change seperator plates?
Last edited by gonzo 6.2; 12-02-2005 at 09:24 AM.
12-02-2005, 10:41 AM
#14
TECH Veteran
i have ran into 2 transmissions with the same condition over the years. the problem turned out to be a cracked case in the fluid path on one and a bad encapsolated valve in the other. in both cases i just replaced the case to fix the issue.
12-02-2005, 05:51 PM
#16
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4l60e
The original problem was a worn out clutch packs. and a broken spring in the 3-4 acumalator piston and the sun gear shell was worn out on the splines where the sun gear goes. but was not destroyed...after we put it together the first time...the 3-4 clutch packs fryed. but we found a broken seal in the 2-4 Servo....so we figured that was the problem ....but after replacing all the broken parts. again. and replacing the transmission back to the suburban we still have no 3-4 gear...it will go to 2nd gear and just rev up.
12-03-2005, 09:18 AM
#20
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What about that electronic gear selector thing. Mine went bad and wouldn't let me start the truck. $700 at the dealership later.... the truck fires up.