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Discussion Starter #1
Hey guys...

I finally had my trutrac installed. After waiting for two months for an approval from the dealer to replace my rearend, they finally gave me the ok. In the process, I also had them install the trutrac:rockon

My question now is...does the VDC still work? I tested the trutrac today in the rain with the VDC on. At a stop, I stomped it and immediately the VDC kicked in. I thought that having the trutrac, the VDC is bypassed or did I misunderstood the forum. Well anyways, I turned off the VDC and stomped on it again and I immediately hit redline and the Titan swayed left to right in the rain. Big difference! So...do I leave the VDC off or on when I want to burn out on two wheels...or did the dealer install it wrong.
 

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Titan671 said:
Hey guys...

I finally had my trutrac installed. After waiting for two months for an approval from the dealer to replace my rearend, they finally gave me the ok. In the process, I also had them install the trutrac:rockon

My question now is...does the VDC still work? I tested the trutrac today in the rain with the VDC on. At a stop, I stomped it and immediately the VDC kicked in. I thought that having the trutrac, the VDC is bypassed or did I misunderstood the forum. Well anyways, I turned off the VDC and stomped on it again and I immediately hit redline and the Titan swayed left to right in the rain. Big difference! So...do I leave the VDC off or on when I want to burn out on two wheels...or did the dealer install it wrong.
I too was under the impression that the VDC would no longer work.
 

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My understanding is VCD is there but it should it turn on, since both wheels should be spinning the same way. Maybe some of the members w/trutrac can chime in.
 

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Titan671 said:
Hey guys...

I finally had my trutrac installed. After waiting for two months for an approval from the dealer to replace my rearend, they finally gave me the ok. In the process, I also had them install the trutrac:rockon

My question now is...does the VDC still work? I tested the trutrac today in the rain with the VDC on. At a stop, I stomped it and immediately the VDC kicked in. I thought that having the trutrac, the VDC is bypassed or did I misunderstood the forum. Well anyways, I turned off the VDC and stomped on it again and I immediately hit redline and the Titan swayed left to right in the rain. Big difference! So...do I leave the VDC off or on when I want to burn out on two wheels...or did the dealer install it wrong.
The TT only goes in one way, you cant put it in backward, even with a really big hammer, lol. As far as VDC, my truck has an XE education and can't even spell VDC.
 

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True trac will not allow your ABLS to kick in and because both of your rear wheels will be traveling the same speed.

VDC however is another issue
 

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I thought the VDC was based on all four abs sensors. I would assume the VDC saw that the rears were at 30 mph while the fronts were at 0 mph. It probably applied the break to slow the rears down. That seems pretty easy for it if it is designed to help you regain control in a skid where it might apply the break to one wheel to help staighten things out.

I don't I just know that is how other VDC systems work.
 

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The VDC will still work, it doesn't know that something in the rear was changed. The Tru Trac isn't a locker so there should still be some difference between the two back tires. The abls will also still work if it senses on wheel spinning faster than the other.
 

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Discussion Starter #10
Thanks for all the input guys. I guess I'll just leave the VDC off. The trutrac is awsome! Now I need to email Uprev for a new tune. Thanks again.:cheers:
 
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