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HD Extreme Tru-Lok 4wd harness

12K views 14 replies 4 participants last post by  RWB713 
#1 · (Edited)
SOLD​

HD Extreme Tru-Lok 4wd Harness.

Tru-Lok 4wd Harness ( HD Extreme )

Fitment:
RZR 900 S, 4, 50/55″: 2015-Current
RZR 1000 XP & XP 4 – 2014-Current
*NOTE* High Lifter Ed. RZR must add Tru-Lok AWD switch
RZR Turbo XP & XP 4 – 2016 – Current
RZR 1000 S & S4 – 2016 – Current

Brand New, never installed.

$100 shipped

 
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#6 ·
You can engage at any speed, or any RPM. That is its main function really, to bypass the ECU safeties. The ECU won’t engage until below 3100 rpm from the factory, this switch would remove that limit.


-Give it a second... it had to go to space and back first ( Sent from the lifeline that is my iPhone XS Max )
 
#9 ·
No, it will not, nothing will do that. No matter what anyone claims, it simply cannot be done in these machines, that’s not how the front differential functions, especially not from an electrical standpoint. I suppose if a guy was overly committed, you could ( maybe, not even sure if the gears exist to do such thing ) match the front gear ratio to the rear, but then it would permanently be in 4wd, no option for 2wd.

The rear wheel speed must exceed that of the front, with the coil energized, to rotate the Sprague and engage the rollers between the ring gear and output hubs to engage the drive. That operation is purely mechanical once the coil is energized.


-Give it a second... it had to go to space and back first ( Sent from the lifeline that is my iPhone XS Max )
 
#10 ·
I read it as just allowing you to engage the 4wd at higher than 3100 rpm. But you still have the rear slip engagement issue. Hence the question about having to stop to engage 4wd. If it is instantly locking the front drive I can’t imagine you want to be doing that at 40mph. Their website doesn’t say anything about overriding the rear wheel slip


Sent from my iPhone using RZRForums.net
 
#11 ·
Doesn’t matter what speed you do it at if the rear wheels aren’t slipping, or, if you’re off the throttle. If the front and rear wheel speed are the same, then the switch does nothing but energize the coil.

The website shouldn’t say anything about that either, because it’s not possible.

The actual engagement of the front actually works pretty flawlessly in regards to rear wheel slippage, it takes 1/24th or 1/20th (depending on model) of a front wheel rotation to engage the drive after the rear has slipped. You should always engage 4wd before you need it, and this switch lets you do that whenever, without having to come to a crawl. The mechanical aspects of the engagement are pretty well designed by Hillard.


-Give it a second... it had to go to space and back first ( Sent from the lifeline that is my iPhone XS Max )
 
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