DANA Built Axles

Identification code is stamped on rear surface of right axle tube. In addition, the 3-digit axle code appears on tape strip attached to outboard end of axle tube.

NOTE: Drive axles are balanced with pinion flange (acts as a harmonic member to reduce driveline vibration). If ring and pinion gear set, pinion flange assembly or pinion bearings need replacement, replace entire axle assembly using appropriate system-balanced service axle assembly.

ASTRO & SAFARI REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

7.625" Ring Gear

USM, USN ⁽¹⁾, UTM ⁽¹⁾, UTL ⁽¹⁾

3.23:1

USR ⁽¹⁾, USP ⁽¹⁾, UTP ⁽¹⁾

3.42:1

UST ⁽¹⁾, UTS

3.73:1

⁽¹⁾	With positive traction, limited slip differential.

ASTRO & SAFARI FRONT AXLE RATIO IDENTIFICATION

Application & Code	Ratio
7.625" Ring Gear (ZYD)	3.42:1

"C" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

8.5" Ring Gear

UMJ ⁽¹⁾, XPD, XPH ⁽¹⁾. XPL

3.08:1

RYS, RYX ⁽¹⁾, UUT, XPF, XPJ ⁽¹⁾, XPM, XPP ⁽¹⁾, XR

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⁾

4.10:1

RYD, RYJ ⁽¹⁾

4.56:1

10.5" Ring Gear

RYK, RYN ⁽¹⁾

3.42:1

RYL, RYP ⁽¹⁾, XYL, XZC

3.73:1

RYM, RYR ⁽¹⁾, XUD, XYM, XYY, XZA, YAL

4.10:1

XYN, XYR, XYZ, XZB

4.56:1

11" Ring Gear

UXP, UXK, UXL

4.63:1

UXR

5.13:1

⁽¹⁾	With positive traction, limited slip differential.

"C/K" SERIES REAR AXLE RATIO IDENTIFICATION

Application & Code

Ratio

10.5" Ring Gear

AYA, AZA

3.42:1

CNB, XZK, XZL, YAK, YAN, YAX YBB, YBF, YBJ, YBM

3.73:1

XZM, XZN, YAL, YAS, YAT ⁽¹⁾, YAY, YAZ ⁽¹⁾ YBC ⁽¹⁾, YBG ⁽¹⁾, YBK, YBN ⁽¹⁾

4.10:1

YAM, YAU, YAW ⁽¹⁾, YBA ⁽¹⁾ YBD, YBH ⁽¹⁾, YBL, YBP ⁽¹⁾

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, XZR

4.10:1

RKR, RKW ⁽¹⁾, LZA

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

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

4.10:1

RMG, RMJ ⁽¹⁾, 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

TYJ, USJ, 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

UMT, UMX ⁽¹⁾

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⁾, YCK, YCL ⁽¹⁾

4.10:1

RYW, RZA ⁽¹⁾

4.56:1

10.5" Ring Gear

RZB, RZF ⁽¹⁾

3.42:1

RGR, RZC, RZG ⁽¹⁾, SZY, XYS, XZJ

3.73:1

RZD, RZH ⁽¹⁾, XYT, XYW ⁽¹⁾, XZD, XZF ⁽¹⁾, YAL

4.10:1

XYU, XYX, XZG, XZH ⁽¹⁾

4.56:1

⁽¹⁾	With positive traction, limited slip differential.

"K" SERIES FRONT AXLE RATIO IDENTIFICATION ⁽¹⁾

Code

Ratio

ZLS, ZLW

3.42:1

ZLX, ZLT

3.73:1

⁽¹⁾	8.25" ring gear is used on K1 and K2 models. 9.25" ring gear is used on K3 models. No other information is available from manufacturer.

"P" SERIES REAR AXLE RATIO IDENTIFICATION ⁽¹⁾

Application & Code

Ratio

10.5" Ring Gear

SDK, SGB, SDN ⁽²⁾, SDR, SDU ⁽²⁾

3.73:1

SDL, SDS, SDX

4.10:1

SDM, SDP, SDT, SDW ⁽²⁾, SDY, SFA ⁽²⁾, UWS, UWW

4.56:1

TJY ⁽²⁾

4.88:1

SDZ, UWU

5.13:1

11.0" Ring Gear

UWH

4.63:1

TFT, TFU, UWJ

5.13:1

⁽¹⁾	1994 information not available from manufacturer.

⁽²⁾	With positive traction, limited slip differential.

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

Application & Code

Ratio

7.625" Ring Gear

TFY, YDJ

2.73:1

TGB, UBR, USZ, UTA, YCM ⁽¹⁾, YDM YDR, YDU, YDK ⁽¹⁾, YDL, YDC

3.08:1

SZM, SZN ⁽¹⁾, UBT ⁽¹⁾, UTB, UTC ⁽¹⁾, UBS ⁽¹⁾, YDP YDS, YDT, YDW, YDX

3.42:1

XRJ, XZU ⁽¹⁾, YDY ⁽¹⁾, YDZ ⁽¹⁾

3.73:1

UYC, XRK

4.10:1

⁽¹⁾	With positive traction, limited slip differential.

"T" SERIES FRONT AXLE RATIO IDENTIFICATION ⁽¹⁾

Code

Ratio

ZBX

3.08:1

SKY, ZBY, ZYD, ZYH

3.42:1

SKZ, ZPC, ZPU, ZYF

3.73:1

⁽¹⁾	7.5" ring gear is used. No other information is available from manufacturer.