ROCKWELL Built Axles

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 1991 Oldsmobile Bravada, 1991 GMC Vandura Special, 1991 GMC Vandura, 1991 GMC Value Van, and 1991 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Identification code is stamped on carrier assembly.

ASTRO & SAFARI REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

7.625" Ring Gear

SGF, SGS, SGG ⁽¹⁾, SGT ⁽¹⁾

3.23:1

SGH, SGU, SGJ ⁽¹⁾, SGW ⁽¹⁾

3.42:1

SGK, SGX, SGL ⁽¹⁾, SGY ⁽¹⁾

3.73:1

SGM, SHL, SGN ⁽¹⁾, SHM ⁽¹⁾

4.10:1

⁽¹⁾	With positive traction, limited slip differential.

"C" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

PDB, PDL, PDU, PFA, PDG ⁽¹⁾, PDR ⁽¹⁾, PDX ⁽¹⁾, PFD ⁽¹⁾

3.08:1

PDC, PDM, PDW, PFB, PDH ⁽¹⁾, PDS ⁽¹⁾, PDU ⁽¹⁾, PFF ⁽¹⁾

3.42:1

PDD, PDN, PDJ ⁽¹⁾, PDT ⁽¹⁾

3.73:1

9.5" Ring Gear

PGJ, PGY, PSM ⁽¹⁾, PHC ⁽¹⁾

3.42:1

PGK, PGZ, PGH ⁽¹⁾, PHD ⁽¹⁾

3.73:1

PGL, PHA, RNN, PGP ⁽¹⁾, PHF ⁽¹⁾

4.10:1

PHB, PHG ⁽¹⁾

4.56:1

10.5" Ring Gear

TFA, TFD ⁽¹⁾

3.42:1

RWY, RXF, RXM, SKG, TFB, RXB ⁽¹⁾, RXT ⁽¹⁾, RXR ⁽¹⁾, TFF ⁽¹⁾

3.73:1

RWZ, RXG, RXN, SKH, TFC, RXC ⁽¹⁾, RXK ⁽¹⁾, RXS ⁽¹⁾, SKL ⁽¹⁾, TFG ⁽¹⁾

4.10:1

RXA, RXH, RXP, RXD ⁽¹⁾, RXL ⁽¹⁾, RXT ⁽¹⁾

4.56:1

10.5" Ring Gear (ROCKWELL)

TFW

4.56:1

TFX

5.13:1

⁽¹⁾	With positive traction, limited slip differential.

"G" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

PNK, PNL ⁽¹⁾

3.08:1

PNM, PNN ⁽¹⁾

3.42:1

PNP, PNR ⁽¹⁾

3.73:1

9.5" Ring Gear

HBG, KCT ⁽¹⁾

3.23:1

PYR, RAP, PYN ⁽¹⁾, RAR ⁽¹⁾

3.73:1

PYS, RBS, PYP ⁽¹⁾, RBT ⁽¹⁾

4.10:1

HBJ, KCU ⁽¹⁾

4.56:1

9.75" Ring Gear (DANA)

SJJ, SJK

4.10:1

SJG, SJH

4.56:1

10.5" Ring Gear

RGU

3.42:1

RGW

3.73:1

10.5" Ring Gear (DANA)

RGG

3.42:1

RGH, SKP

3.73:1

RGJ, SKM, SKR

4.10:1

SKN

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"K" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

PFG, PFL, PFT, PFY, PFJ ⁽¹⁾, PFP ⁽¹⁾, PRW ⁽¹⁾

3.42:1

PFH, PFM, PFU, PFZ, PFK ⁽¹⁾, PFR ⁽¹⁾, PFX ⁽¹⁾, PGA ⁽¹⁾, PGB ⁽¹⁾

3.73:1

PFN, PSF ⁽¹⁾

4.10:1

9.5" Ring Gear

PHS, PJG, PHW ⁽¹⁾, PJL ⁽¹⁾

3.42:1

PHT, PJH, PHX ⁽¹⁾, PJM ⁽¹⁾

3.73:1

PHU, PJJ, PHY ⁽¹⁾, PJN ⁽¹⁾

4.10:1

PJK, PJP ⁽¹⁾

4.56:1

10.5" Ring Gear

TFH, TFL ⁽¹⁾

3.42:1

RWY, RXF, RXM, SKG, TFJ

3.73:1

RWZ, RXG, RXN, SKH, TFK, RXB ⁽¹⁾, RXJ ⁽¹⁾, RXR ⁽¹⁾, TFM ⁽¹⁾

4.10:1

RXA, RXH, RXP, RXD ⁽¹⁾, RXL ⁽¹⁾, RXT ⁽¹⁾, RXC ⁽¹⁾, RXK ⁽¹⁾, RXS ⁽¹⁾, SKL ⁽¹⁾, TFN ⁽¹⁾

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"K" SERIES FRONT AXLE RATIO IDENTIFICATION

Code	Ratio
ZBK, ZCP, ZGS, ZHW	3.42:1
ZBL, ZCR, ZGT, ZGX, ZHX	3.73:1
ZBM, ZCS, ZGU, ZHY	4.10:1
ZHZ, ZGZ	4.56:1

"P" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

10.5" Ring Gear

HJN, PXR, RPP, HJS ⁽¹⁾, PXU ⁽¹⁾

3.73:1

HJP, PXS, RPR

4.10:1

HJR, PXT, PXW, RPS,

SWT, SWX, RPU ⁽¹⁾, HJT ⁽¹⁾

4.56:1

SWU, SWY

4.88:1

PLX, RPT

5.13:1

10.5" Ring Gear (ROCKWELL)

RLL

5.13:1

⁽¹⁾	With positive traction, limited slip differential.

"R" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

PNT, PNY ⁽¹⁾

3.08:1

PNU, PNZ ⁽¹⁾

3.42:1

PNW, PPA ⁽¹⁾

3.73:1

9.5" Ring Gear

KBW, KBX ⁽¹⁾

3.42:1

RAA, RAB ⁽¹⁾

3.73:1

RBW, RCK ⁽¹⁾

4.10:1

GUN

4.56:1

10.5" Ring Gear

KMV, KMX ⁽¹⁾

3.42:1

GDP, HFP, HFY, HKP,

HKS ⁽¹⁾, HFT ⁽¹⁾, HHL ⁽¹⁾

3.73:1

GDR, HFR, HFZ,

HKT ⁽¹⁾, HFU ⁽¹⁾, HHM ⁽¹⁾

4.10:1

GDS, HFS, HFW ⁽¹⁾, HHN ⁽¹⁾, KDC ⁽¹⁾

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"S" & "T" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

7.5" Ring Gear

GAJ

3.42:1

GAK, HZP ⁽¹⁾

3.73:1

GAL, HZR ⁽¹⁾

4.11:1

7.625" Ring Gear

RNB

2.73:1

KUK, KUN, RNC, RND ⁽¹⁾, RNH, RPW, RPZ, RRA, RRC, RRD, RRG, RRH

3.08:1

PLM ⁽¹⁾, PMM, KUR, KUS ⁽¹⁾, RNE, RNG RNJ, RNK ⁽¹⁾, RPY ⁽¹⁾, RRB ⁽¹⁾, RRF ⁽¹⁾, RRJ ⁽¹⁾, RPXX

3.42:1

⁽¹⁾	With positive traction, limited slip differential.

"T" SERIES FRONT AXLE RATIO IDENTIFICATION

Code	Ratio
ZAH	3.08:1
SKY, ZAD, ZAK, ZXC, ZYD	3.42:1

"V" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

PPB, PPJ, PPF ⁽¹⁾, PPM ⁽¹⁾

3.08:1

PPC, PPK, PPG ⁽¹⁾, PPN ⁽¹⁾

3.42:1

PPD, PPH ⁽¹⁾

3.73:1

9.5" Ring Gear

RAC, RAD ⁽¹⁾

3.73:1

RBY, RCL ⁽¹⁾

4.10:1

10.5" Ring Gear

GDP, HHP, HHX, HHT ⁽¹⁾, HJK ⁽¹⁾

3.73:1

GDR, HHR, HHY, HHU ⁽¹⁾, HJL ⁽¹⁾

4.10:1

GDS, HHS, HHZ, HHW ⁽¹⁾, HJM ⁽¹⁾

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"V" SERIES FRONT AXLE RATIO IDENTIFICATION

Code

Ratio

ZDC, ZDP, ZGC, ZHC, ZHD, ZGD

3.08:1

ZDK, ZDU, ZGH, ZHH, ZMH

3.42:1

ZDX, ZDZ, ZFB, ZFD, ZFF, ZFM, ZGK, ZGM, ZGN, ZHK, ZHN, ZFR ⁽¹⁾, ZFS ⁽¹⁾,

3.73:1

ZFP, ZFN, ZFT ⁽¹⁾, ZFU ⁽¹⁾, ZGP, ZGR, ZHP, ZHR

4.10:1

ZFW ⁽¹⁾, ZFX ⁽¹⁾

4.56:1

⁽¹⁾	DANA built front axle.