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10-16-2012, 10:11 PM
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#1 |
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Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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VIN help
i have a 78 thats pretty much junk. except the axles are supposed to be dana 60 and corporate 14 with 5.xx:1 gears... this is what im told. it is impossible to get under the truck to verify numbers, i would have to dig the truck out from its grave as its very very overgrown into place as its been in its place for 20 years.
is there a way to know what the gears are based on vin or spid if its not specified? heres the info i have VIN CKR248J149958 SPID MODEL: CK20903 A28 SLIDING REAR WINDOW E63 FLEETSIDE BED G80 LOCKING DIF. K76 61 AMP DELCOTRON GE MX1 AUTO TRANS NL2 AUX FUEL TANK UO1 ROOF MARKER LIGHTS VO2 TRANS OIL COOLER XUE 9.50X16.5 TUBELESS Z53 GAGES VOLTMETER 71W XRR1 RED CUSTOM VINYL A01 SOFTRAY GLASS DG4 EXT. B/EYE MIR (7.5" F60 H.D. FRONT SPRINGS & HEAVY DUTY POWER BRAKES LF4 400 4B ENG NA2 STANDARD EMISSION UA1 4000 WATT HD DELCO F U63 AM PUSHBUTTON RADIO U76 TOWING DEVICE YUE 9.5X16.5 TUBELESS Z62 SCOTTSDALE EQUIP 9V1 COLOR COMBINATION BL I GOT THE BASIC VIN DECODE- 78 CHEVY 3/4TON 400CID MADE IN JANESVILLE. SEEMS LIKE A PRETTY WELL ORDERED TRUCK I JUST WISH I KNEW OR COULD VERIFY THAT THE GEARS ARE THE 5.13 THAT IM TOLD THANKS A TON! |
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10-16-2012, 10:42 PM
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#2 |
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Registered User
Join Date: Dec 2011
Location: Elkhart, IN
Posts: 1,308
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Re: VIN help
I'm pretty positive the only way is if it shows on the SPID in the glove box of the truck, or stamped or a tag that is actually on the axles themselves.
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1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257 |
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10-16-2012, 11:28 PM
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#3 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: VIN help
I can't imagine them being that low from the factory, especially being only a 3/4 ton. I would bet they are 3.73 or 4.11, unless the gears have been changed out. 5.13's are awfully low.
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1974 Jimmy- 5.3/4L80e/NP241 |
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10-17-2012, 12:03 AM
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#4 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: VIN help
Quote:
20903 is a K20. It would have GT4 3.73 or GT5 4.10 gears with a Dana 44HD axle up front. The only CK trucks with 5.xx gears are the 2wd Cab-N-Chassis trucks with the Dana 70 dually and 19" wheels. If it really has a Dana 60 up front then it could have anything for gears. Look behind the front wheel. A Dana 44 has ball joints the 60 has king pins. If dirt is over the top of the axles they're likely hurt bad.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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10-17-2012, 07:11 AM
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#5 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: VIN help
Per the powertrain chart in the GM Heritage Center archives the base axle (and only available axle) for a '78 K20 with the LF4 is a 3.73:1.
Your truck has 3.73's in it, assuming they have not been changed. K  Link to free downloads of information kits: http://www.gmheritagecenter.com/gm-h...tion-kits.html
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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10-17-2012, 07:33 AM
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#6 |
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Registered User
Join Date: Jul 2010
Location: Janesville, WI
Posts: 664
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Re: VIN help
Thanks Keith that's the type of chart I was hoping to see. They may have been changed. Its my dads truck I know its a 350 th400 in it now dad says he remembers it just screaming at road speed And he says 5.13 or 5.38 however he is generally knowledgeable he's also getting forgetful and a 373 scream may seem like. 5.13 20+ years later: ) thanks again they'll be pulled eventually for a.straight. axel convervison on a 93 and ill let you guys know what I come up with then
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