Re: Guys who went to 35's . . .
 

Looks like I'll be doing the PCM for Less. The dealership finally stepped up, and agreed to properly set the PCM with my recommendation of the PCM for Less. I take it in next week, and pick up the loaner until it's done. Will report back the difference after I get it back.

Re: Guys who went to 35's . . .
 

Do the math on a long page. Take your time with whatever you decide. Count to ten. Take a deep breath. Then tell them all your going with the competition!

Re: Guys who went to 35's . . .
 

:confused: :confused: :confused:

Re: Guys who went to 35's . . .
 

I doubt the PCM is the solution anyway.

Re: Guys who went to 35's . . .
 

Then what is?? :confused:

Re: Guys who went to 35's . . .
 

Based on the way GM thoroughly engineered the H3, 32" or 33" inch tires are optimal, since a gearing change is not readily available.

Re: Guys who went to 35's . . .
 

You would be incorrect. Just got back the H3 over the weekend, and it now drives great.

I'll do another post about it when I get a chance.

:beerchug:

Re: Guys who went to 35's . . .
 

Good to hear it's downshifting less, which means the acceleration is that much slower than stock as engine lugs in higher gears.

Re: Guys who went to 35's . . .
 

question for you smart people. I am in the final stage of getting 35s but have one final question. I noticed most of you that have 35s have the adventure package which has the 4:1 transfer case. I dont have that, i have the basic.

I dont know what the gearing is in the base transfer case or how it would effect anything so this is my question. Would I, with the regular transfer case, notice any difference in perforemance (decrease due to the larger tires) more than you guys have or just the same?

Thanks,
Marin

Re: Guys who went to 35's . . .
 

Probably the same, but you're starting with less (in gearing) to begin with. IMHO

Re: Guys who went to 35's . . .
 

so what does that really mean, that i am starting with less gearing? In the t-case are the hi and low gears different from the base to the adventure or only the low? Thanks!

Re: Guys who went to 35's . . .
 

Only the low range gear ratio is different. The only gearing difference for day-to-day driving would be between a manual and an auto.

Re: Guys who went to 35's . . .
 

does anyone know if the pcmforless thing would calibrate the truck for 35s. The reason that i wopuld like this is because of my nav, it uses the VSS, is teh differnce between 33s and 35s gona throw it off. the nav is an aftermarket pioneer avic-z1.

i know this can be done my purchaseing a speed pulse generator from pioneer but its around 250, and it would be used only for the nav. are there any other options?

thanks.

Re: Guys who went to 35's . . .
 

I Agree with Steve in San Jose

"Based on the way GM thoroughly engineered the H3, 32" or 33" inch tires are optimal, since a gearing change is not readily available."

Since we have an I-5, gearing is the only way to compensate for 35" tires. Off road in 4:1 low you might not notice it too much but on the highway?

35" tires are alot bigger than 33". If you change axle gears to 4:88 or lower the teeth on the gears get thinner (smaller) which are more likely to break and with bigger tires you are putting more leverage on half shafts, u-joints and front diffs.

Without changing anything and going to 35" tires your gas mileage will go down and acceleration will suffer. No ifs ands or buts!

Re: Guys who went to 35's . . .
 

That is true, but it is not as drastic as some make it out to be.

Re: Guys who went to 35's . . .
 

I would think the hit to acceleration via the 35's would be significant, but not the gas mileage difference.

Re: Guys who went to 35's . . .
 

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.:beerchug:

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

Re: Guys who went to 35's . . .
 

Yes, they fix the speedo with their tune.

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