Using a Detroit locker here in the Challenger, Dana 60, we've had no issues, fitted in 2014 IIRC. I can't hear it make a noise, (over the exhaust note anyway). And it doesn't feel "clunky" at all. I read a lot of stuff on here saying it would be horrible, noisy etc but in all honesty it has been fine and doesn't feel any different to the 4 pinion power lock that it replaced. Now a friend has a locker in a Cougar with a 9", behind a 347 and a five speed. That was fitted about 20 years ago and it is noisy. I'm wondering if the newer ones a different design?
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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