Gear Codes

From Faq

THIS CHART IS FOR '95.5-04 MODELS ONLY!

The axle code for your rig can be found on the manufacture's sticker located on the driver's side door jamb as follows:

First digit:

• A = 7.5" ring gear
• B = 8" ring gear

Next two digits:

• 01 = 3:42
• 02 = 3:58
• 03 = 4:10
• 04 = 4:56
• 05 = 3:15
• 06 = 3:91
• 07 = 4.30

Last digit:

• A = 2 Pinion, Open
• B = 4 Pinion, Open
• C = 2 Pinion OEM Limited Slip

some '98-00 models have shown a BO code of "???" on the door plate; so far this turns out to be a 3.91 gear ratio, at least for the 5sp. RZN171L-CRPDKAB with factory 31s/265s should be 4.56 with the AT.

Edit by Ed Quinones on 10-7-05: I used to own a 99 Prerunner ext cab 2.7L with auto tranny and gear code of B07A. It came from the factory with a 4.56 gear ratio.

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