05-06-2009, 05:59 PM
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| Junior Member
Join Date: Jul 2006 Location: Cary, NC
Posts: 59
Car: 87 IROC, 2006 4x4 Silverado Engine: 355 TPI, 5.3L Transmission: T5, Auto Axle/Gears: Posi, 3.23:1 | Stock GM BIN Question / Advice
Hi Guys,
In addition to my own 355 TPi tuning project, my nephew and I rescued another IROC-Z that was destined for the crusher.
The goal for his car is a stock setup.
The IROC-Z is a 1987 5.0 TPI / T5 setup.
Based on some rough measurements, I think the differential gear set is 3.73:1. Very steep when combined with the T5!
I searched for a few "close" stock GM BIN options and arrived at the following conclusions.
1122ACXC
1139ACYD
The only "published" BIN options that I have found via the web are listed below.
ACXS
1135ACYC
What was the application for the ACXS BIN?
Any other "close match" BIN suggestions?
Best Regards,
Bruce | | | |
 
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