Iroc
...in 1985 1985 Rear Axle and Gear Identification
1985 IROC-Z Dimensions 1985 Computer Trouble Codes
1985 Exterior Color Information 1985 Interior Color Information
1985 Factory Options (RPO's) View the 1985 Showroom Brochure
1985 IROC-Z Key Points of Interest
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1985 Total Produced (RPO B4Z) 21,177
Dealership Sticker Price $15,800
1985 VIN Breakdown Example: 1G1FP87H6FN100001
1
G 1 FP 87 H 6 F N 100001
1st Digit 2nd Digit 3rd Digit 4th & 5th Digits 6th Digit 8th Digit 9th Digit 10th Digit 11th Digit 12-17 Digits
Nation of Origin
1=USA
2=Canada
Manufacturer
G=General Motors
Division
1= Chevrolet
7= GM of Canada
Carline/Series
FP=Sport Coupe or Z28
Body Type & Restraint System
87=Coupe 2dr Sport
Engine Code
See Below
Check digit VIN position Model Year 1985
Assembly Plant Code
N-Norwood, Ohio
L-Van Nuys, Cal.
Number in line at assembly plant
1xxxxx--Norwood
4xxxxx--Van Nuys
Available Engines in 1985
RPO #
Liter Injection C.I.D. H.P. Rating Engine Code # Produced
LG4 5.0 Carbureted 305ci 155hp H 63,052
L69 5.0 Carbureted 305ci 190hp G 2,497
LB9 5.0 Tuned Port 305ci 215hp F 32,836
Available Transmissions in 1985
RPO #
Type Specifications ID # Produced
MXO Auto 4 Speed with OD 700R4 152,600
Man 76mm 4 Speed
Man 83mm 4 Speed
Man 77mm 4 & 5 Speed
1985 Rear Axle and Gear Identification
The code to identify your axle gear is located on the front face of the right hand axle tube about three inches from the differential cover.
Number Decode
A typical code could be 8PS 0 103 2 - The initial number and next two letters (8PS) indicate the axle code, here a 1985 Posi with a 3.73 axle ratio. The next number or letter (0) identifies the...
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