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Member
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Join Date: Sep 2018
Location: Raleigh, NC
Posts: 431
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Member
Join Date: Sep 2018
Location: Raleigh, NC
Posts: 431
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Tim,
I don't live in AZ, so I can't speak directly from that experience. But I do live in NC where we see extremely humid 95-100 degree summers.
The probable and unfortunate answer is an expensive one- re-gearing. I went from 3.91 (15" wheel base SR5) to 4.88's.
My coolant temps with the old gears hung around 193-198 (which is normal!).
With the 4.88's, I'm rarely if ever over 188 degrees, even in the dead of summer while wheeling with low airflow.
I'm thinking that with your weight + 33" tires, your truck is simply working way too hard to stay at speed.
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2000 SR5 4x4 | Geared, Locked and Fully restored OEM+ build.
Forged and Cammed 1UZ Single Turbo, Standalone ECU + Built R150 in process. Why, you ask? Because it makes no sense in this platform, and I love it!
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