I want to use either a tko 600 or the new keisler rs600 manual transmission with a 0411 ecm. Is the vss needed for a manual swap ( some say no but others say yes)??
I know on a t56 the vss prevents the transmission from being shifted into reverse unless the car is stopped but does the vss serve any other function or can it be eliminated if the aftermarket transmission does not use a reverse lockout.
On ls1tech someone said their car would stall when depressing the clutch as the car returned to idle and adding a vss cured the problem.
I have a mechanical speedometer so if I were to incorporate a vss it would have to be a pass thru type such as dakota digtital 8 pulse generator
http://www.dakotadigital.com/index.c...rod/prd109.htm
or painless 4 pulse generator
http://www.summitracing.com/parts/PRF-60116/
If not using an electronic speedometer, I have read that the pulse generated does not have to match what the pcm is programmed to expect - the pcm just needs to know when the car is coming to a stop.
Also some people say the 0411 ecm cannot be programmed for either an 8 pulse or 4 pulse generator using efilive ( but hp tuners does allow such programming) because the minimum pulse allowed using efilive is 10. I noticed efilive allows a correction factor to be applied to the speedometer calibration ( the table states that it is for only small errors in the speedometer). If the ecm needs to know the actual speed could I use this table to make a large correction to the calibration. For example, if i set the ecm to 40 pulse per revolution and then applied a .1 correction factor using a 4 pulse per revolution vss would the ecm calculate the correct speed.