1979 Chevrolet Malibu 496-TH400-9" (cruiser). 1992 Chevrolet S10 355-700r4-7.625" (daily driver).
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494 Posts
It won't have engine braking in OD as the overrun clutches don't (and shouldn't) apply there. Your foot off the gas would likely activate the lock up in the torque converter and cause the RPM to drop.
2nd gear is a band (also called the 2-4 band) that applies to the reverse input drum. It releases as the 3rd gear clutch is activated and then reapplies for 4th gear (OD) while the 3rd gear clutch (also called the 3-4 clutch) stays applied. The drum and the band see some wear with use.
As you suggested a number of things happen for the 1-2 shift. When you're towing, the extra throttle might make the shift happen with more pressure and cover up the delay you may have at light throttle???
The kit in the link along with the Corvette servo should do your 4l60e some nice benefits. The instructions indicate how and where to tighten up the clearance for that 2-4 band. The Corvette servo helps with 2nd gear apply and helps the 2-3 shift improve.
Stay on the conservative side with the hole sizes (in the directions with the kit) and you should be good. It has been a while since I got into a 4l60e and I'm sure I'm leaving something out. If any of this is incorrect, hopefully one of the far more knowledgeable folks can chime in.
2nd gear is a band (also called the 2-4 band) that applies to the reverse input drum. It releases as the 3rd gear clutch is activated and then reapplies for 4th gear (OD) while the 3rd gear clutch (also called the 3-4 clutch) stays applied. The drum and the band see some wear with use.
As you suggested a number of things happen for the 1-2 shift. When you're towing, the extra throttle might make the shift happen with more pressure and cover up the delay you may have at light throttle???
The kit in the link along with the Corvette servo should do your 4l60e some nice benefits. The instructions indicate how and where to tighten up the clearance for that 2-4 band. The Corvette servo helps with 2nd gear apply and helps the 2-3 shift improve.
Stay on the conservative side with the hole sizes (in the directions with the kit) and you should be good. It has been a while since I got into a 4l60e and I'm sure I'm leaving something out. If any of this is incorrect, hopefully one of the far more knowledgeable folks can chime in.
