The Corvette servo (or one with larger surface area, for example from Sonnax) is a must, there's no doubt about this (and it's an easy install).
The Corvette servo (or one with larger surface area, for example from Sonnax) is a must, there's no doubt about this (and it's an easy install).
+1 it's locked/private...
tunetool says this when I try to open it:
[Window Title]
Error
[Content]
EFILive cannot load the file: C:\Users\joecar\Downloads\05burbanStockCal_01_0000 .ctz
This file is flagged as private. The contents cannot be viewed using the EFILive V7 software, please use the EFILive V8 software instead.
[OK]
Last edited by joecar; September 21st, 2017 at 03:57 AM.
Umm, how do I unlock it for your viewing pleasure? I'm using a V2 BTW...
Just found this awesome post, as Joecar knows after my tune which involved setting shift points due to the 4:11 gears and mid mount torque arm. Spun out of the hole, hit second put car sideways mostly thru the gear hit third and bounced rev limiter telling me third didn't hold up lol I can drive it easy in third so in a month or so out comes trans time for rebuild and use a lot of this info !
During the rebuild there are various Sonnax upgrade parts that help to hold 3rd and 4th gears in high torque applications...
on ls1tech.com there are a few 4L60E build threads where they explain the Sonnax upgrade parts.
Hey Joe. The Corvette Servo is an EASY install. The SONNAX super servo is NOT simple. If not installed correctly, you will not have 4th.... or 4th will slip tearing up the
trans. The clearance for the sonnax (combo of 2nd and 4th) 4th servo is .075 - .125 outside of that window it will either drag and burn the band or there will be no 4th.
We use a fixture we made and a dial indicator 90 deg to the cover and a "rocker lever" to apply the band from the cover manually for measuring.
Additionally, we always buy the sonnax extra long apply pin and grind it to fit. (takes many small grinding adjustments to get it right)
Go ahead.... Ask me how I know all this..... :(
Chuck CoW
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Hey Chuck,
Thanks for the info on the Sonnax super servo and band pin.
The fixture for measuring sounds like a good idea to make the job easier.
Not sure if this is right place to ask but did 0411 swap in my 96 it doesnt want to shift to 2nd in my driveway if i power brake in garage it shift at pretty high rpm. Looked at the upshift rpm parameters and they are all set at either 5000 or 4500 rpm the tune was a van tune i pulled off of here somewhere. Wondering if anyone knows what these values should be for the stock van tune for a decent starting point