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Axle RPO Code?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jersey, Oct 16, 2001.

  1. Jersey

    Jersey 1/2 ton status

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    '82 burb, 1/2 ton, 350, 10b & 12b rear. sticker in the glove says '1GQ1" and description says "Standard Axle" I looked it up on the RPO codes and it says "GQ1 AXLE, STD RATIO" Does anyone know what standard ratio came on these burbs? or at least the most common on '82 1/2 tons? Like to swap 'em in and hoping they're better then my dog 3.42's. Thanks - Jersey

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>[/b]PICS[/b]</a>
     
  2. outlaw612

    outlaw612 1/2 ton status

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    Not positive, but I think the base gear was a 3.08. Someone should be able to decifer the code for ya.

    <a target="_blank" href=http://www.geocities.com/outlaw613/K5.html>http://www.geocities.com/outlaw613/K5.html</a>
     
  3. Jersey

    Jersey 1/2 ton status

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    you're killing me outlaw!!!! :) i hope they're not 3.08's. I was realllllly hoping for 4.10's or at least 3.73's. Anyone have any better answers??? haha. sorry outlaw, just bustin.

    - Jersey

    '91K5 - 350, 700R4, NP241, Flowmaster
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>[/b]PICS[/b]</a>
     
  4. 90K5

    90K5 1/2 ton status

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    I think most 80's Subs came with 3.42's...thats not one of the normal codes though...look for one of these
    GU2=2.73
    GU4=3.08
    GU6=3.42
    GT4=3.73

    90K5
     
  5. outlaw612

    outlaw612 1/2 ton status

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    Hopefully Im wrong, but thats what the default gears were in my Blazer. Maybe the sub is different.

    <a target="_blank" href=http://www.geocities.com/outlaw613/K5.html>http://www.geocities.com/outlaw613/K5.html</a>
     
  6. reddog64

    reddog64 1/2 ton status

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    AO1 - Softray Tinted Glass

    AO1 - Tinted Glass All Windows

    A28 - Sliding Rear Window

    A31 - Power Windows

    AU3 - Power Door Locks

    B32 - Color Keyed Front Floor Mats

    B3J -Diesel Equipment

    B84 - Black Body Side Moldings (Fleetside Only)

    B85 - Bright Body Side Moldings (Fleetside Only)

    B93 - Door Edge Guards

    B96 - Wheel Opening Moldings

    C42 - Heavy Duty Front Heater (Not Available with RPO C60 A/C)

    C60 - Air Conditioning

    C91 - Dome Lamp

    CD4 - Intermittent Windshield Wiper System

    D44 - Painted Below Eyeline Mirrors

    D45 - Stainless Steel Below Eyeline Mirrors

    D73 - Pickup Box Side Rails

    DF2 - Camper Style Stainless Steel Mirrors

    DG4 - Extended Below Eyeline Mirrors

    DG5 - Senior West Coast Style Painted Mirrors

    E63 - Fleetside Pickup Box

    E81 - Wood Floor Fleetside Pickup Box

    F60 - Heavy Duty Front Springs (Came With HD Front &amp; Rear Shocks Recommended For Snow Plow Use On 1/2 Ton Trucks)

    G80 - Locking Rear Differential

    J55 - Heavy Duty Power Brakes

    K22 - 94 Amp Alternator

    K34 - Electronic Speed Control

    K30 - Speed &amp; Cruise Control

    K81 - Cold Climate Package (Including Special Insulation, 66 Amp Alternator, Special Heater &amp; Defroster, Engine Block Heater, HD Battery.)

    KC4 - Engine Oil Cooler

    KC4 - Engine Oil Cooler

    KO5 - 600 Watt Engine Block Heater

    LE8 - 7.4 Liter V 8

    LE9 - 5.0 Liter V 8

    LF3 - 5.0 Liter V 8

    LF4 - 400 V 8 Engine

    LO5 - 5.7 Liter V 8

    M40 - TH 400 Transmission

    MX0 - TH 700 Transmission

    One of these two below is a 3spd manual trans, and the other a 4spd manual, not sure which yet, sorry!

    MM4 -

    MM7 -

    MX1 - TH 350 Transmission

    N33 - Comfortilt Steering Wheel

    N41 - NP 203 Fulltime 4wd Transfer Case

    N67 - Rally Wheels (1/2 Ton Trucks Only)

    N90 - Aluminum Cast Wheels

    NL2 - Auxiliary Fuel Tank

    NY7 - Transfer Case Shield (Skid Plate)

    P11 - Glide Out Spare Tire Carrier

    P13 - Side Mounted Spare Tire Carrier (Fleetside Only)

    PO1 - Bright Wheel Covers (1/2 Ton Trucks)

    PA1 - Bright Metal Wheel Covers (3/4 Ton Trucks)

    RO5 - Dual Rear Wheels ( 1-Ton Trucks Only)

    TP2 - 3500 Watt Aux. Delco

    TT5 - Halogen High Beam Headlamps

    U01 - Roof Marker Lamps

    U16 - Tachometer

    U35 - Quartz Electric Clock

    U37 - Cigarette Lighter

    U58 - AM/FM Stereo Radio

    U63 - AM Radio

    U69 - AM/FM Pushbutton Radio

    U69 - AM/FM Radio

    U76 - Windshield Antenna

    UA1 - Heavy Duty Battery

    UF2 - Cargo Lamp

    UM6 - AM/FM Stereo Radio With Seek, Scan, Stereo Cassette Player &amp; Clock

    UN3 - AM/FM Stereo Radio With Stereo Cassette Player

    VO1 - Heavy Duty Radiator

    VO2 - Heavy Duty Radiator &amp; Transmission Cooler

    V22 - Chrome grille

    V31 - Chrome Front Bumper Guards

    V42 - Chromed Rear Step Bumper (Fleetside Only)

    V43 - Painted Rear Step Bumper

    V76 - 2 Front Tow Hooks

    VF1 - Chromed Rear Bumper

    X6Z - Automatic Front Locking Hubs

    YE9 - Silverado Package

    YG1 - Custom Package (Fleetside Only) Including Bright Wheel Opening Moldings, RPO #'s B84, B96, &amp; Bright Trim For Side Marker Lamps &amp; Tail Lights.

    YG3 - Deluxe Package Including Bright Trim For Side Marker Lamps &amp; Tail Lights.

    YJ6 - Decor Value Package

    YWF - 10 x 16.5/ Load Rating "D" Tubeless Tires

    Z53 - Gauge Package (Including Voltmeter, Engine Coolant Temp, 66 Amp Alternator)

    Z75 - Front Quad Shock Absorbers (Dual Shocks)

    Z81 - Camper Special Chassis Equipment

    ZQ2 - Operating Convenience Package Including AU3 Power Door Locks &amp; A31 Power Windows

    ZY1 - Solid Paint

    ZY4 - Deluxe 2-Tone Paint

    ZY5 - Exterior Decor Package



    This is by no means a complete list. It's a good start though!
     
  7. jerseymudder

    jerseymudder Registered Member

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    I had an 80 'Burban with that exact set up. I still have the rears at my old mans and they are 3.08, SORRY. Are you on the yahoo jersery k5 group?
     
  8. Russell Keys

    Russell Keys 1/2 ton status

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    there should be a three digit letter code on the top of the rear axle tube between the shock mount and the spring pad on the pass side. The service or parts dept. at your local dealer should be able to tell you what you have w/that code. I've been told that there is also a code on the front axle, but not sure which side. Hope this might help-Russell
     
  9. Jersey

    Jersey 1/2 ton status

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    90K5 - what is weird is that it doesn't look like the tag in my k5 with the 80 different codes. It was listed with only about 15 codes, all starting with a 1, and a description after each of them. Maybe a reprint? But it does say "1GQ1" and "Standard Axle" for the description for one of them.

    OUTLAW - unfortunatly, i hope you are wrong in this situation! [​IMG]

    RED - Thanks for posting all that. I'm sure that'll come in handy to a bunch of people. There is also a site... i think

    [/b]PICS[/b]
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    Pulled two ten bolts out of 80's 'burbs with OD, both were 3.42's.

    There a reason not to pull the cover off and check what the ring gear tells you?


    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  11. Jersey

    Jersey 1/2 ton status

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    long story, but basically real tough to get to the truck in daylight and pull the cover. truck not in my possesion or i would have never posted this question, just would have pulled the cover and checked. i asked a buddy that works there to jack it up and spin the tire one rev and count how many times the driveshaft spun and he said a little more than 1 1/2. Not sure how to figure that out. was expecting like 3 1/2 or just over 4 revs of the driveshaft to figure 3.73 or 4.10, 4.11's but nooooo....couldn't be that easy! I think im just going to have to take a half day off work and dig that thang out to be sure. Went to GM and gave them the tag out of the glove, and they couldn't even tell me what was the "standard ratio" for that truck. Says they delete all older truck info to have room for the newer stuff. nice. thanks for all the help.

    - Jersey

    '91K5 - 350, 700R4, NP241, FlowMasters, 33's
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>[/b]PICS[/b]</a>
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    I'm not sure even GM could get that info back in the day! I don't believe even the service manual covers the "standard axle ratio" like they used to in the 60's. I *think* about the only place you can find that info is in one of the dealer brochures that the dealers got that would explain more in depth about the trucks than an owners manual...colors available, wheel options, etc.

    I hate how GM did this, cars are the same way. Anything other than the base axle ratio is listed as a seperate RPO, but if you don't know the base ratio, and don't have 5 different trucks form the same year with RPO tags, there really doesn't seem to be a way to determine that "standard" RPO. Doesn't help that the axle codes carried over on all GM vehicles, so a "standard" ratio in a car certainly isn't the same as a truck.

    You can always scrape the rear axle passenger side front of the tube, and use those codes, but that of course isn't 100% on a used vehicle either.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  13. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Hate to say it man, but it sounds like you have 3.42's If he just spun one tire, while holding the other, he would have had to spin it 2 times to get the correct number (assuming open differential). If you take 3.42 and divide it in half (for only turning the wheel one complete revolution instead of 2) you get 1.71 which is "a little more than 1 1/2". It could be worse though, it could of had 3.08's or the rare 3.23's (I think only 1980 had 3.23's as an "option"). There has been "debate" on here as how to identify R&amp;P ratios, and the best method is to pull the cover and count teeth (in a situation like this it could be tough though).

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot>http://coloradok5.com/gallery/Leadfoot</a>
     
  14. Jersey

    Jersey 1/2 ton status

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    yeah, thought about it last night. probably 3.08's or 3.42's, depending on how the "little" was in "a liittle more than 1 1/2" I'm just going to have to go down there one day and pull the diff cover and check it out. Thanks for the feedback.

    - Jersey

    '91K5 - 350, 700R4, NP241, FlowMasters, 33's
    <a target="_blank" href=http://pages.zdnet.com/len1313/blazer>[/b]PICS[/b]</a>
     
  15. dyeager535

    dyeager535 1 ton status Premium Member

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    Interesting. Check this out www.dorianyeager.com/index2.html
    Why insist on counting when the ring gear has the tooth counts stamped in?
     

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