Jeep commonly used terms Encyclopedia

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Jeep commonly used terms Encyclopedia

45RFE-automatic transmission in the V8 WJ

8.25-Chrysler 8.25" axle found in XJ rears

ARB-A company based in Australia that produces popular winch-compatible bull bars and differential air lockers.

AT (A/T)-all terrain (all terrain tread) tire

ATF-Automatic Transmission Fluid

AW4-the automatic transmission used on the XJ since 1987

AX15-5 speed manual stick in a pre-99 6 cylinder TJ

AX5-5 speed manual stick in a pre-99 4 cylinder TJ

BB-Budget Boost. An inexpensive, popular 2" lift used by many Jeepers.

BL-body lift

BS or Back Spacing. backspacing, distnace from the mounting flange of a wheel to the inner edge (rim) of the wheel. i.e. larger BS will cause the wheel to sit "into the fender" more, smaller BS will cause the wheel to "stick out" more. Absolutely necessary to determine proper wheel and tire combination

CAT-catayltic converter

CJ-Jeep Wrangler's Older Model Years. "Civilian Jeep"

CJ-2A-Civilian version of the MB, split windshield

CJ-3A-Updated version, single pane windshield

CJ-3B-High hood version of 3A to fit larger engine

CJ-5-Early years were 81" wheelbase, later years were ~84". Built until 1983.

CJ-6-Stretch version of CJ-5, 101" wheelbase

CJ-7-smilar to late CJ-5, but with ~94" wheelbase. Built until 1986.

CJ-8-Scrambler Pickup, stretch version of the CJ-7, 104" wheelbase.

CJ-10-Heavy Duty Truck.

D30 (D30r)-(DANA30)

D44 (D44i)-iron Dana 44 axle (TJs)

D44a(D44) but with aluminum housing (V8 ZJs and WJs)

D60-(DANA60)

DANA30 (DANA30r)-front axle (r = reverse cut) All modern Jeeps

DANA35C-axle (YJs, ZJ, WJs, TJs)

DANA60-axle (very strong)

DC-Daimer Chrysler

DW-death wobble. Side to side movement of the front axle that causes the Jeep to shake violently. Most common on lifted ZJ's before a wheel alignment has been done. Can be caused by worn steering stabilizer, improper wheel alignment, or worn front suspension components.

ECU-Engine Control Unit (same as PCM). Very popular mod. Common one made by Mopar.

EFI-electronic fuel injection

F2R-front to rear swap lift

FC150/170-Forward Control Cabover trucks

FM-FlowMaster muffler

FSJ-Full Size Jeep (SJ's and J-trucks).

FSM-field service manual

GC-Grand Cherokee

GPW-Willy MB built by Ford

HO-High Output. New engine option for WJs

HP-high pinion. Usually accompanied by RC gears - the pinion enters the differential higher, which allows for better driveline angles.

IAC-idle air controller

ICE-This flashes on overhead display when the temperature is below 32 degrees

IFS-independent front suspension

IRS-independent rear suspension

JGC-Jeep Grand Cherokee

JU-Jeeps Unlimited

K&N FIPK-Fuel Injection Performance Kit refers to an air intake kit from K&N

KJ-Jeep Liberty All Model Years

LA-Long arm

LCA-lower control arm

LSD-limited slip differential

LWB-long wheel base

MAF-mass air flow sensor. Measures airflow coming into your engine in front of the throttle body. Uses a form of resistor that is cooled by the air passing by it and mathematically determines the "mass" of the air coming into the engine. These are traditionally bottle necks for heavy breathing engines as they often have a screen in them to protect the measuring element. There are many different designs and high performance large capacity ones out there.

MAP-manfold absolute pressure. A sensor that tells the computer how much air is flowing into your engine. Eliminates the need for a MAF sensor but is less responsive than one.

MT (M/T)-Mud terrain (mud tread) tire

NP231-Command-trac transfer case (2H, 4H, N, 4L)

NP242-Selec-trac transfer case (2H, 4PT, 4FT, N, 4L)

NP249-Quadra-trac transfer case (4H, N, 4L)

NV3550-5 speed manual stick in a post-99 6 cylinder TJ

NVRnoise vibration harsness

OBA-on board air

OBC-on board computer

OBDII-on board-diagnostics

OEM-Original Equipment (standard equipment on our vehicles like it came from the factory)

OHC-Overhead console

OME-A manufacturer of small lifts and shocks and steering stabilizers. Their SD40 steering stabilizer is very popular.

PCM-Performance Control Module (same as ECU)

PSI-pounds per square inch

QD-Quadradrive

QT-Quadra-Trac

RA-Road Armor

RC-reverse cut. This is a ring and pinion set with the helix on the gears cut in the opposite direction to normal. It allows the pinion to enter the differential higher up in the casing, and, when used in the front differential, makes use of the stronger side of the ring gear when moving forward.

RE-Rubicon Express

SAS-solid axle swap. Taking out the crappy IFS (ala Liberty) and replacing with something you can 'wheel on.

SFA-solid front axle

SOA-spring over axle. A popular conversion for Jeeps with leaf springs. You take the spring from under the axle, and remount it on top.

SRA-solid rear axle

SWB-short wheel base

SYE-slip yoke eliminator. A kit used mostly in 231 transfer cases to shorten the rear output shaft

TB-throttle body

TB-track bar. that positions and centers the axle (front or rear) relative to the body.

TC-transfer case

TC-torque converter

Tera-Teraflex. Maker of Jeep products including lifts

TJ-Jeep Wrangler's Model Years 1997-Present

TPS-throttle position sensor

TQ-torque converter

TR-trail ready

TSB-technical service bulleten

TV Cable-Throttle valve cable (controls shift points)

UCA-upper control arm

VIC-vehicle information center

VC-vicuous coupling. Method of coupling front and rear driveshafts together in 249 transfercase while in highrange and offers differentiation between the two. 96-98 models bypass this and lock in low range

WJ-Jeep Grand Cherokee's Model Years 1999-Present

XC-transfer case

XJ-Jeep Cherokee's 1984 - Present

YJ-Wrangler 1987 - 1995. Exact same wheelbase as CJ-7... square headlights

ZJ-Jeep Grand Cherokee's Model Years 1993-1998