Correct VSS for 95 4L60-E?

[Ken Kelly]

Luke,
	You have most of the pieces figured out. Here is the way they go together. The
VSS is 40 pulses per revolution measured on the output shaft. The PCM (8051)
creates the two seperate signals from this 40 PPR Vss signal. There are two
seperate divide chains in the PCM. One scales for the speedometer. The other
sets up the Speed for the transmission shift tables. The transmission shift
tables are in MPH, so the PCM scaling takes tire size and Rear ratio into
account. 

	Did you use an older tailshaft housing to get the Speedometer drive, or did you
modify your 95 tailshaft so you still have the VSS?

	Luke, I am going to try something like your number 4). I am putting mine in a
48 ford. I picked up a speedometer that is about the same size and scale at a
junk yard. I intend to put that meter movement in my 48 Ford speedometer
housing.

		Ken

"Luke B. Joseph" wrote:
> 
> 
>        (95 9C1 LT1 and 4L60-E in 85 Monte SS)
> I have read the archives and my gm shop manual and determend that I have the
> wrong set up for my tranny and LT1.  The fact that it is not shifting
> anymore is also a dead giveaway.  I am a litte confused on the best solution
> to my problem though.  Currently I have a the correct gear placed in the
> tranny to drive my speedo cable with a Howell 4 pulse/rev VSS in line.
> Prior to this the tanny shifted fine but I had no speedometer.  My gm manual
> says that the output of the VSS is a ac voltage that varies from .5v  at 100
> rpms to 100v at 8K rpm.  It also says that there are two signals being used
> one is a 2002 pulses per mile signal that  is used by the engine the other
> is a 40 pules per rev signal used by the tranny.  The archives and JTR say
> that for 94+ RWD cars with auto trans a 40 tooth reluctor is used for VSS.
> It seems that I have the following choices and I could use some help in
> choosing the correct one.
>                                 1) Use the present setup and convert the
> signal similar to what Charles Morgan did (Archives).
>                                        but will this provide both signal to
> engine and tranny, I do have snap crackle pop back fire in deceleration.
> 
>                                  2) Use  the stock setup and use JTR
> digitaly fed electric motor to turn speedo cable.
> 
>                                  3) Find correct in line converter, if it
> exists.
> 
>                                  4) Use the stock setup and install a
> digital speedo similar to OEM
> 
>                                  5) Use the stock setup and use" true
> digital  speedo"    0 = stop   1 = WOT
> 
>                                  6)  Open for other suggestions.
> 
>                        Thanks,
>                                          Luke
> 
>