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02-21-2007, 10:02 PM
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Hummer Veteran
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Join Date: Mar 2006
Location: Lexington, KY
Posts: 127
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by JWSchmidt3
Are you having any issues with, or does it seem your transmission shifts at much different intervals than from stock?? I had an Adv. H3, and I am currently driving a 2007 dealer loaner while my lifted H3 is at the dealer, and my suspician is confirmed. One of the issues I sent the H3 in for is the tranny shifting. It always wants to shift down to low gear way too early. Is this because of the 35's?? Is there any way to properly calibrate the bigger tires?? My truck drives like a turd compared to thos '07. BTW, I also have a CAI and exhaust installed. Any help appreciated, as the dealership has yet to give me any real hope.

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I've had mine installed for less than 24 hours and I would highly recommend the PCM for less tune. Totally different beast with the 35's. 
__________________
2006 H3 Lux/Offroad - Slate Blue - Ebony Leather - Sunroof - Brush Guard - Husky Rear Mat - Petz Cover (so my Wheaton Terrier can ride with me) - GOBI Stealth Rack - PIAA Lights - DC/AC Coverter - Truxxx Leveling Kit - DC1 Wheels - 35"X12.50" Toyo Open Country AT - Step Bars - Onboard Air - Chrome Fire Extinguisher
2003 Mercedes Benz S500 AMG
2003 BMW Z3 - Wife's
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02-26-2007, 04:37 AM
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Hummer Authority
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Join Date: Mar 2006
Location: Chicago, IL
Posts: 1,086
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Re: Guys who went to 35's . . .
another quick question. The about 7% difference in the speedo between the 32 inch stock tire and the 35 inch toyos, is that a linear diffrence or exponential? By that I mean if your speedo shows 65, then you are actually going 70, is the same true if it shows 15 the actual is 20 mph, or would it be different?
Also do you think that this difference (speedo 7% slower tahn actual) is enough to throw off an aftermarket nav (pioneer avic z1) which uses the speed pulse in doing its calculations?
also i didnt understand if the pcmfor less calibration of the pcm can calibrate the speedo for the 35s, can someone clarify that? I know they ask what tire you are ising but do they actually configure teh speedo?
thanks
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05-04-2007, 08:39 PM
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Hummer Veteran
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Join Date: Mar 2006
Location: DFW, Texas
Posts: 118
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by marin8703
also i didnt understand if the pcmfor less calibration of the pcm can calibrate the speedo for the 35s, can someone clarify that? I know they ask what tire you are ising but do they actually configure teh speedo?
thanks
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Yes, they fix the speedo with their tune.
__________________
J.W.
2006 yellow H3 - Pro Comp Xtreme package
4" lift, 35's, Lux, etc.
2004 yellow Corvette Z06
2002 black LPE blown TigerShark Z06
http://public.fotki.com/JWSchmidt3/
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05-04-2007, 09:50 PM
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Hummer Veteran
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Join Date: Nov 2006
Location: lat 42 3340 long 82 49.95
Posts: 216
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Re: Guys who went to 35's . . .
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
__________________
It's easier to get forgivness than permission
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05-10-2007, 08:10 AM
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Hummer Authority
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Join Date: Nov 2005
Location: Mississippi
Posts: 1,776
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by HUMMJAY
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
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My 75 cents worth.
I love the pcm change along with my dual exhaust from Jason
I got the Billy Boat exhaust
http://www.somo.com/
Average 12 - 13 mpg with the 35's, but have no acceleration issues now
and shifts great.
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Black Sheep Hummer Squadron
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05-10-2007, 09:53 AM
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Hummer Professional
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Join Date: Feb 2006
Location: Out in the windy oil field
Posts: 358
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by westhillsat
I love the pcm change along with my dual exhaust from Jason
I got the Billy Boat exhaust
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Weshillsat
what does the billy boat exhaust sound like. is it like the stock exhaust ?
__________________
H3 / Superior Blue / Black Leather / Lux / Off-road / Sunroof / Tow-package / OEM rock rails / Aries Brushguard and Nerf bars (modified) / Husky mud flaps / 2.5 turns / Rino GPS dashmount
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05-20-2007, 12:35 AM
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Hummer Veteran
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Join Date: Mar 2006
Location: DFW, Texas
Posts: 118
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Re: Guys who went to 35's . . .
Quote:
Originally Posted by HUMMJAY
JWS- you've had the new pcm for a couple of months now,,, how's it working?? I've had 35's on my truck for about 9months and would love to get my milage and proformance back,,,, I'm on the verge of going back to 33's
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Works great. Couldn't be happier.

__________________
J.W.
2006 yellow H3 - Pro Comp Xtreme package
4" lift, 35's, Lux, etc.
2004 yellow Corvette Z06
2002 black LPE blown TigerShark Z06
http://public.fotki.com/JWSchmidt3/
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