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Dewdlebug · 01-04-2017, 02:15 PM

I've run my collar on the driveshaft yoke for over 5 years with absolutely no issues. Yes I'm sure the collar moves longitudinally a fraction or two as the rear suspension flexes but it's never been a issue on the data readings. I run a 12 bolt rear and I have never spent the time to purchase a longer rear gear yoke. The 1.5" collars are readily available from Racepak (2 magnet). I looked a few years ago for a 4 or 8 magnet x 1.5" but couldn't find one.
Make sure you set the pick-up location with the car loaded on all four wheels and not while it's on jack stands.

01-04-2017, 02:15 PM	#2
Dewdlebug Member Join Date: Jan 2009 Location: League City, TX Posts: 120 Likes: 2 Liked 19 Times in 12 Posts	Re: Driveshaft RPM Collar Location Question I've run my collar on the driveshaft yoke for over 5 years with absolutely no issues. Yes I'm sure the collar moves longitudinally a fraction or two as the rear suspension flexes but it's never been a issue on the data readings. I run a 12 bolt rear and I have never spent the time to purchase a longer rear gear yoke. The 1.5" collars are readily available from Racepak (2 magnet). I looked a few years ago for a 4 or 8 magnet x 1.5" but couldn't find one. Make sure you set the pick-up location with the car loaded on all four wheels and not while it's on jack stands.