ZR-1 Net Registry Forums - View Single Post - Your ZF6 makes noises or won't shift, what to do?

WVZR-1 · 04-05-2008

Tom,

I based my thoughts regarding the VSS on the fact that a '90 car shares the CCM/BCM with an '89 car and I thought those early TPI cars were 2000 pulse. The CCM/BCM changed in '91 along with the VSS's and those I believe are 4000.
The VSS I received from Vauxhall was the only available and I believe the fellow worked hard trying to find me another one or two. I didn't need it but purchased as spare.
Something just came to mind and I mean "just", usually the speedometer looks for the signal from the ECM with most early GM cars. Maybe the speedometer might see a 4000 pulse but I expect the CCM/BCM still wants to see something else for the odometer. I sure don't know but I'll stick with my thoughts for now!

-Dave

04-05-2008	#22
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: Your ZF6 makes noises or won't shift, what to do? Tom, I based my thoughts regarding the VSS on the fact that a '90 car shares the CCM/BCM with an '89 car and I thought those early TPI cars were 2000 pulse. The CCM/BCM changed in '91 along with the VSS's and those I believe are 4000. The VSS I received from Vauxhall was the only available and I believe the fellow worked hard trying to find me another one or two. I didn't need it but purchased as spare. Something just came to mind and I mean "just", usually the speedometer looks for the signal from the ECM with most early GM cars. Maybe the speedometer might see a 4000 pulse but I expect the CCM/BCM still wants to see something else for the odometer. I sure don't know but I'll stick with my thoughts for now! -Dave