Guys who went to 35's . . .

[JWSchmidt3]

Here's another issue, I bought the truck new from the dealer with this package installed (they call it the Xtreme Comp Pro package). The sales guy specifically said, "Oh yea, it's all been re-tuned for the bigger tires, intake and exhaust. They use the Tech-II". My extensive modding with Corvettes told me he was probably full of it, but I'm now holding them to it. I'm just curious if anyone else had such a drastic impact when they changed to 35's, or if I have another issue.

[CrisB]

You bought that H3 like that? The dealership probably did that themselves, somebody there thinks he knows what he's doing. I would definitely hold them to it, they built it.

[JWSchmidt3]

Originally Posted by Cris Burkhalter

You bought that H3 like that? The dealership probably did that themselves, somebody there thinks he knows what he's doing. I would definitely hold them to it, they built it.

Yes, but they contracted an offroad shop to do the package. The dealership is pretty reputable. I'll hold them to it, but the fact remains the PCM can not be properly calibrated for the bigger tires, and I'm wondering what other guys who have gone to 35's have done.

[HummBebe]

Originally Posted by JWSchmidt3

I'm wondering what other guys who have gone to 35's have done.

Wheel the hell out of it

[jdrew]

Originally Posted by HummBebe

Wheel the hell out of it

+10 points for an excellent post!

[NEOCON1]

Originally Posted by HummBebe

Wheel the hell out of it

[K9sH3]

JW,
I would hold them to it also, they lied (fraud) to sell you a H3. If you have that in writing you may have a new 3 coming if this one turns out to be a POS. In the mean time, I would do as Hummbebe said "Wheel the hell out of it" they (dealer) customized and gave it that name.

No amount of so called tuning combined with aftermarket intake and exhaust systems will counteract the hit to acceleration caused by the larger diameter 35" tires. Your gearing is now substantially taller than the stock H3 w/32's or 33's.

[JWSchmidt3]

Originally Posted by Steve - SanJose

No amount of so called tuning combined with aftermarket intake and exhaust systems will counteract the hit to acceleration caused by the larger diameter 35" tires. Your gearing is now substantially taller than the stock H3 w/32's or 33's.

So, would a gear change help??

[HummBebe]

Originally Posted by Steve - SanJose

No amount of so called tuning combined with aftermarket intake and exhaust systems will counteract the hit to acceleration caused by the larger diameter 35" tires. Your gearing is now substantially taller than the stock H3 w/32's or 33's.

Using a calculator would show that it reduces you to about 4:29's. Still better ratio than on an H2

[HummBebe]

Originally Posted by JWSchmidt3

Here's another issue, I bought the truck new from the dealer with this package installed (they call it the Xtreme Comp Pro package). The sales guy specifically said, "Oh yea, it's all been re-tuned for the bigger tires, intake and exhaust. They use the Tech-II". My extensive modding with Corvettes told me he was probably full of it, but I'm now holding them to it. I'm just curious if anyone else had such a drastic impact when they changed to 35's, or if I have another issue.

That is an outright lie. There is no Tech II program for tire increase to 35". Only from 32" to 33".

[JWSchmidt3]

Originally Posted by HummBebe

That is an outright lie. There is no Tech II program for tire increase to 35". Only from 32" to 33".

That's what I thought when I bought it, but was only 99% sure. I won't call someone out unless I'm 100%. Tomorrow I pick up the truck, and meet with the Hummer GM.