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Rear End Ratio RPO Codes Here

This is a discussion on Rear End Ratio RPO Codes Here within the Technical / Maintenance forums, part of the General Discussion category; does an one no before i go mesher if a rear end from a 84 1500 will go wright in ...

  1. #181
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    Re: Rear End Ratio RPO Codes Here


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    does an one no before i go mesher if a rear end from a 84 1500 will go wright in my 89 or are they different. Thanks

  2. #182
    Run What You Brung
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    Re: Rear End Ratio RPO Codes Here

    is the GT4 an open diff?
    1994 GMC 1500 stepside
    -4" lift with 33's on American Racing Outlaw's
    -two 10" subs
    -eclipse deck
    -dual flowmaster exhaust (no cat)
    -Tranny rebuilt w/ HD internals, custom
    converter
    -Turbo Action shift kit
    -Custom pinstriping
    -3.73's
    -edelbrock headers awaiting install
    -2" cowl hood

  3. #183
    Run What You Brung
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    Re: Rear End Ratio RPO Codes Here

    I tried to swap out an 87 10 bolt but it was a no go, brakes were way too big and the axle itself was 2-4 inches shorter. while the 87 was also a half ton like my 94, it wasnt even close.
    1994 GMC 1500 stepside
    -4" lift with 33's on American Racing Outlaw's
    -two 10" subs
    -eclipse deck
    -dual flowmaster exhaust (no cat)
    -Tranny rebuilt w/ HD internals, custom
    converter
    -Turbo Action shift kit
    -Custom pinstriping
    -3.73's
    -edelbrock headers awaiting install
    -2" cowl hood

  4. #184
    Registered User SierraDan's Avatar
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    Re: Rear End Ratio RPO Codes Here

    Mine is GU6, which is apparently 3.42, now how do I know is it's posi or open without trying to do a burnout?

    95 Sierra C1500 SL
    99 Suburban K1500 LT

  5. #185
    Registered User 92blackchev's Avatar
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    Re: Rear End Ratio RPO Codes Here

    Where can you look if the stickers in the glove box are worn out?
    92 Chevy 350tbi
    175,000 mi
    Rebuilt Motor
    Rebuilt Tranny with shift kit
    Dual Exhaust
    265's

  6. #186
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    Re: Rear End Ratio RPO Codes Here

    i have a 1992 z71 ext cab with a 350 my door sticker and glove box sticker is wore out. tag is missing on rear but i got these numbers off the ring gear 3988517 11-41 G.M.K can anyone tell me what it means

  7. #187
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    Re: Rear End Ratio RPO Codes Here

    i have a 78 chevy k20 and the info i got on the gear ratio's are 3.92 front and a 4.56 in the rear is this possible

  8. #188
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    Re: Rear End Ratio RPO Codes Here

    If You Want The Rpo Codes For 1973-1987 Chevy Fullsize Trucks Go To Chuckschevytruckpages.com For One Of The Most Complete Lists I've Seen

    Hope I Help'd

  9. #189
    Homesick NBer
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    Re: Rear End Ratio RPO Codes Here

    if you need to find your rpo codes if the list in the glovebox is worn off, take your vin into a dealer, they should be able to print you out the list.
    2003 Chev Silverado 4x4 4.10 gears and it has a 4.8L
    1997 GMC Sierra 4x4 4.3L 4L60E KOSS CD player,16mpg,3.73 gears z71 skid plates <<<sold

    4th year apprentice at Chev Dealer

  10. #190
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    Re: Rear End Ratio RPO Codes Here

    I bought a 93 Chevy ECSB and someone has swapped out the rearend from the 10 bolt to a 14, where is the marking on the rear end to find out what gear ratio is in it. The only reason I know they changed them is because I ran the vin and it was supposed to have a 10 bolt. I am pretty sure it has a locker or posi in the 14 bolt because both tires hook up if it spins.
    2000 RCSB Z71|5.3L|K&N Intake|Flowmaster|Vette Servo|4.88s|6" Trailmaster|3" Body|Keys|Moto Metal 955s|Pro Comp A/T 37's|Kenwood In-Dash|JBL|Kicker

  11. #191
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    Re: Rear End Ratio RPO Codes Here

    41-11 is a 3.73

  12. #192
    Registered User ahhwataday's Avatar
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    Re: Rear End Ratio RPO Codes Here

    daaaaaammm. I loooked at mine and I have gt5 g80. So its 4.10 posi
    Last edited by ahhwataday; 06-22-2008 at 08:59 AM.

  13. #193
    Registered User Harley1650's Avatar
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    Re: Rear End Ratio RPO Codes Here

    GU2 2.73.....dang....
    88' Peterbilt 383SS
    383 stroker 325 hp
    MAACO paint
    Lots of cash, blood, sweat and new swear words

  14. #194
    Registered User joshknoxville's Avatar
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    Re: Rear End Ratio RPO Codes Here

    my glove box had 2 numbers

    GQ1 and GU4 in that order, which gear do i have stnd or 3.08?

  15. #195
    Registered User N0DIH's Avatar
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    Re: Rear End Ratio RPO Codes Here

    3.08.

    Bet the GQ1 means you have the 7.5" axle.

    Quote Originally Posted by joshknoxville
    my glove box had 2 numbers

    GQ1 and GU4 in that order, which gear do i have stnd or 3.08?

  16. #196
    Registered User LON3STAR's Avatar
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    Re: Rear End Ratio RPO Codes Here

    are these codes applicable to a 94 K1500? mine had a lot of different codes in it, but it did have the GT4 code, which on your list means 3.73 gearing. does this mean that is the gearing I have?
    2004 Chevy 2500HD 6.6L Duramax


  17. #197
    Registered User joshknoxville's Avatar
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    Re: Rear End Ratio RPO Codes Here

    i totally forgot i posted on here but thnx for the details man
    ** Signature image removed by FSC Staff for exceeding the 500x200 limit **

    1993 c1500 262 4.3L sold
    1992 GMC Yukon 2dr Z71 sold
    2001 camaro SS 5.7L
    2000 z71 stdcsb 5.3L

  18. #198
    Registered User isenegger's Avatar
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    Re: Rear End Ratio RPO Codes Here

    my 90 says it has a gu2... which is a 2.73 or so.... is seams good with a 6cyl and th400 on 33s
    2004 Tahoe Z71 Pat G tune
    1998 Silverado C3500 CCLB 2wd

  19. #199
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    Re: Rear End Ratio RPO Codes Here

    what size is a std rear end...its the first one on the list??

  20. #200
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    Re: Rear End Ratio RPO Codes Here

    i have a 97 tahoe built in venezuela there are no rpo numbers anywhere on the vehicle, does any body know what gears did they use. They did not offer options when new, your only choice was the color.

    RDH

 

 
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