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1992

Technical

Go to: Weight Information

Go to: Engine Information

- Camshaft Data

- Engine Head Data

Go to: Transmission Information

Go to: Rear Axel Information

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Model	Weight	Base Price	Production
Firebird V6	3,121		23,099
Firebird V8	3,287		23,099
Firebird V6 (Conv)	--		1,265
Firebird V8 (Conv)	--		1,265
Formula	3,370		1052 (22 1LE)
Firehawk	--		19
Trans Am	3,343		971 (9 1LE)
Trans Am (Conv)	--		663
GTA	3,456		508

Engines:

VIN Code	Transmission	Engine code/type	Induction	Displacement.	Bore	Stroke	Comp. Ratio	Horsepower	Torque	Cats
T	M5, A4	LHO 60°V8	MPFI	3.1 (191)	3.50	3.31	8.75:1	135@4400	180@3600	1
E	M5, A4	LO3 90° V8	TBI	5.0 (305)	3.74	3.48	9.3:1	170@4400	255@2400	1
F	M5, A4	LB9 90° V8	TPI	5.0 (305)	3.74	3.48	9.3:1	200@4400	300@2800	1
F	M5, A4	LB9 90° V8	TPI	5.0 (305)	3.74	3.48	9.3:1	225@4600	290@3200	2
8	A4	B2L (L98) 90° V8	TPI	5.7 (350)	4.00	3.48	9.3:1	235@4400	330@3200	2

*Note: Flammang, James M. & Kowalke, Ron. 1999. "Standard catalog of American cars 1976-1999". Krause Publications, pp 873

Camshaft Data

Motor	Trans	GM Part #	Lift		Duration		Lobe Separation	Rocker Arm Ratio
Motor	Trans	GM Part #	Int.	Exh.	Int.	Exh.	Lobe Separation	Rocker Arm Ratio
305 LO3	A4/M5	10088155*	.350	.384	179	194	109.0	(108/-112)
305 LB9	M5 & A4	10111773*	.413	.428	202	207	114.5	(116/-116)
350 L98	A4	10111773*	.413	.428	202	207	114.5	(116/-116)

*roller cams

Head Data

Engine	GM Part Number	Casting Numbers	Combustion Chamber	Valve Diameter
Engine	GM Part Number	Casting Numbers	Combustion Chamber	Intake	Exh
305 (LO3)	10159551		cc	1.84"	1.5"
305 (LB9)#	10159553		58cc	1.84"	1.5"
350 B2L (L98)#	10159552	14101083, 14096217	64cc	1.94"	1.5"

# NOTE: These heads had the "Swirl Flow Design"

Transmissions:

700R4 Automatic
Transmission code is located on the right rear oil pan rail and includes the year, model, Julian build date and shift built.
Example:1YPMYXXXXXXXXX267A

2	Model Year (1992)
YP	305 CID Application
M	Transmission Type (THM 700-R4)
Y	Build Location (Toledo)
267	Julian Date
A*	Shift Built (1st)

Code

CID

FB 192

FK
350 TPI

FT 305 TBI

FU 350 TPI

FX 350 TPI

FZ 305 TPI

Build Date Code
Starts with the Julian date (day of the year) on which 1991 production started. The build date code continues with the Julian date until December 31 (365). The sequence then continues until the end of the 1990 production. EXAMPLE: January 20, 1992 would translate to a build date code of 385.

Shift Code

Code	Shift
A & B	First shift
C & H	Second shift
D	Day
N	Night

Note:
In addition to the transmission production code number, all passenger cars have a portion of the vehicle identification number stamped on the transmission. The condensed vehicle identification number consists of the division identification number, model year, assembly plant designation and vehicle build sequence number.

The Rear Axle Codes
Is a two letter code stamped on the front passenger side of the axle tube or on an identification tag attached to the carrier cover. It identifies that axle code ratio and if the axle is equipped with the Safe-T-Track option.

In 1990 The Borg & Warner was dropped and only the Saginaw rear axel remained, These all have 10 cover bolts, and a 7.625" size Carrier

RPO Codes	Axel Code	Ratio	Type	Disc/ Drum
G80 GU6	2ON	3.42	Posi
G80 GU5	2PM	3.23	Posi.
G80 GU6	2PN	3.42	Posi.
G80 GU4	6HB	3.08	Posi
GU6	6HE	3.42	Std
GU2	6HE	2.73	Std
G80 GU6	6HF	3.42	Posi
GU5	6HJ	3.23	Std
GU4	6HK	3.08	Std
GU6	6HL	3.42	Std
GU2	6HP	2.73	Std
G80 GU2	6HT	2.73	Posi
G80 GU5	6PM	3.23	Posi
G80 GU6	6PN	3.42	Posi
G80 GW6	8EV	3.27	Posi
GM3 G80	8EW	3.45	Posi
GU4	8HB	3.08	Std
G80 GU2	8HE	2.73	Posi
G80 GU4	8HF	3.08	Posi
GU5	8HJ	3.23	Std
GU4	8HK	3.08	Std
GU6	8HL	3.42	Std
GU2	8HP	2.73	Std
G80 GU2	8HT	2.73	Posi
G80	9ET	2.77	Posi

Resources:
Amos Press Inc. Catalog of FIREBIRD ID Numbers 1967-1993

Code	CID
FB	192
FK	350 TPI
FT	305 TBI
FU	350 TPI
FX	350 TPI
FZ	305 TPI