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clinebarger · 09-10-2016, 10:15 PM

Both NP241, NP261 have a VSS sensor, So no need for you to buy a 2wd unit. A 4wd unit & Adapter will fit both T-Cases.

We only use 2wd units when adapting a older T-case that doesn't have a Output VSS sensor.

All GM Output VSS sensors create the same 40 Pulses Per Revolution A/C Sine Wave Signal.

09-10-2016, 10:15 PM	#99
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 4L80E & TH400 Tech. Both NP241, NP261 have a VSS sensor, So no need for you to buy a 2wd unit. A 4wd unit & Adapter will fit both T-Cases. We only use 2wd units when adapting a older T-case that doesn't have a Output VSS sensor. All GM Output VSS sensors create the same 40 Pulses Per Revolution A/C Sine Wave Signal.