Axle Ratio & Identification

ASTRO & SAFARI FRONT AXLE RATIO IDENTIFICATION

Application & Code		Ratio
7.625" Ring Gear
SKY, ZYD, ZYH		3.42:1
SKZ, ZYF		3.73:1

"C" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

XPN ⁽¹⁾, XRT ⁽¹⁾

3.08:1

UUS, XPF, XPJ ⁽¹⁾, XPM, XPP ⁽¹⁾

3.42:1

UUU, UUW ⁽¹⁾, XPG, XPK ⁽¹⁾

3.73:1

9.5" Ring Gear

RYA, RYF ⁽¹⁾, TXW, TXZ ⁽¹⁾

3.42:1

RYB, RYG ⁽¹⁾, TXX, TYA ⁽¹⁾

3.73:1

RYC, RYH ⁽¹⁾, SJA, TXY, TYB ⁽¹⁾, XRC

4.10:1

RYD, RYJ ⁽¹⁾

4.56:1

10.5" Ring Gear

RYK, RYN ⁽¹⁾

3.42:1

RYL, RYP ⁽¹⁾, SJM, SZX ⁽¹⁾

3.73:1

RYM, RYR ⁽¹⁾, SJN, SJR ⁽¹⁾, SJT, SJW ⁽¹⁾

4.10:1

RDP, SJP, SJS ⁽¹⁾, SJU, SJX ⁽¹⁾

4.56:1

11" Ring Gear (UXG)

4.63:1

⁽¹⁾	With positive traction, limited slip differential.

"C/K" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

10.5" Ring Gear

XUA, XUB ⁽¹⁾, RZJ, RZM⁽¹⁾, SFB

3.73:1

SFF ⁽¹⁾, SFJ, SFM, SJM, SZZ

3.73:1

RZK, RZN ⁽¹⁾, SFC, SFG ⁽¹⁾, SFK, SFN ⁽¹⁾, SFX

4.10:1

SFY ⁽¹⁾, SJW ⁽¹⁾, SZW ⁽¹⁾, SZS, XUC, XUD ⁽¹⁾

4.10:1

RLK ⁽¹⁾, RLZ, RZL, RZP ⁽¹⁾, SFD, SFH ⁽¹⁾

4.56:1

SFL, SFP ⁽¹⁾, SFZ, SGA ⁽¹⁾, XAF

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"G" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

RKF, RKG ⁽¹⁾

3.08:1

RKH, RKJ ⁽¹⁾

3.42:1

RKK, RKL ⁽¹⁾

3.73:1

9.5" Ring Gear

RKM, RKU

3.23:1

RKX, RKZ

3.73:1

RKY ⁽¹⁾, RLA

4.10:1

RKR, RKW ⁽¹⁾

4.56:1

10.5" Ring Gear

RMU, RMX ⁽¹⁾, SYK, SYP ⁽¹⁾

3.42:1

RMW, RMY ⁽¹⁾, RMA, RMC ⁽¹⁾, SYL, SYR ⁽¹⁾, XSX, XSZ ⁽¹⁾

3.73:1

RLW, RLZ ⁽¹⁾, RMB, RMD ⁽¹⁾, SYM, SYS ⁽¹⁾, XSY, XTA ⁽¹⁾

4.10:1

RMG, RMJ ⁽¹⁾, SYN, SYT ⁽¹⁾, XTB, XTC ⁽¹⁾

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"K" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

UUX, UUY ⁽¹⁾, XRA ⁽¹⁾, XRD, XRF ⁽¹⁾, XPR, XPU ⁽¹⁾, XPY

3.42:1

UUZ, UWA⁽¹⁾, XPC, XPS, XPW⁽¹⁾, XPZ, XRB⁽¹⁾, XRH⁽¹⁾, XRG

3.73:1

XPX ⁽¹⁾, XPT

4.10:1

9.5" Ring Gear

TXN, TXS ⁽¹⁾, RYS, RYX ⁽¹⁾

3.42:1

TXP, TXT ⁽¹⁾, RYT, RYY ⁽¹⁾

3.73:1

TXR, TXU ⁽¹⁾, RYU, RYZ ⁽¹⁾

4.10:1

RYW, RZA ⁽¹⁾

4.56:1

10.5" Ring Gear

RZB, RZF ⁽¹⁾

3.42:1

RDM, RZC, RZG ⁽¹⁾, SZY

3.73:1

RZD, RZH ⁽¹⁾, RDN, RDR ⁽¹⁾, RLG, RLH ⁽¹⁾, XPT, XPX ⁽¹⁾

4.10:1

RDP, RDS ⁽¹⁾, RLJ

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"K" SERIES FRONT AXLE RATIO IDENTIFICATION ⁽¹⁾

Code

Ratio

ZHW, ZLS

3.42:1

ZBL, ZGT

3.73:1

⁽¹⁾	No other information is available from manufacturer.

"P" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

10.5" Ring Gear

SDK, SGB, SDN ⁽¹⁾, SDR, SDU ⁽¹⁾

3.73:1

SDL, SDS, SDX

4.10:1

SDM, SDP, SDT, SDW ⁽¹⁾, SDY, SFA ⁽¹⁾, TJT, TJX

4.56:1

TJY ⁽¹⁾

4.88:1

SDZ, UWU

5.13:1

11.0" Ring Gear

UWH

4.63:1

TFT, TFU, UWJ

5.13:1

⁽¹⁾	With positive traction, limited slip differential.

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

Application & Code

Ratio

7.5" Ring Gear

UBA, UBB ⁽¹⁾, XUF, XUG

3.73:1

UBC, UBD ⁽¹⁾, XUH, XUJ ⁽¹⁾

4.11:1

7.625" Ring Gear

TFY

2.73:1

TFZ ⁽¹⁾, TGA, TGB, UBJ, UBR, USZ, UTA, UWG

3.08:1

SZM, SZN ⁽¹⁾, TBS, TGF, TGH ⁽¹⁾, UBK, UBL ⁽¹⁾

3.42:1

UBT ⁽¹⁾, UTB, UTC ⁽¹⁾, UUL ⁽¹⁾, XAZ ⁽¹⁾

3.42:1

⁽¹⁾	With positive traction, limited slip differential.

"T" SERIES FRONT AXLE RATIO IDENTIFICATION ⁽¹⁾

Code

Ratio

ZAH

3.08:1

SKY, ZXC, ZYD, ZYH

3.42:1

SKZ, ZYF

3.73:1

⁽¹⁾	No other information is available from manufacturer.