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05-02-2002, 11:29 AM
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#1 |
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Registered User
Join Date: Apr 2000
Location: Peru,NY
Posts: 183
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Changing Gear Ratio's
My 70 k-10 has a 4:10 rear,my parts truck has a 3:73 rear.Has anyone changed gear ratios without changing out the whole rearend? I was reading the overhaul manual where it said the original shims are cast and cannot be reinstalled for fear of breaking or cracking them.Where can you buy the steel shims to do this change over and is it a easy swap or a pain in the a$$ ?
------------------ 1970 K-10 292 Longbed stepside powersteering but manual brakes!Factory step bumper,Deluxe gauges no Tach 4 speed manual 1 out of 464 made with protectoplate intact.Its basic for a farm truck
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Where Am I ? How did I get Here ?  1970 K-10 292 Longbed stepside (now a stakerack)powersteering ,Factory step bumper,Tow Hooks,Deluxe gauges Tach & Throttle, 4 speed manual 1 out of 464 made with protectoplate intact . |
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05-02-2002, 11:44 AM
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#2 |
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Senior Member
 
Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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05-02-2002, 02:39 PM
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#3 |
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Account Suspended
Join Date: May 2000
Location: IL
Posts: 0
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4.10 was not avaialble on K-10, maybe you mean K20 ?
3,73 and 3.07 is all was availaable in 67-72 K series 1/2 ton 4,11 could be had on 1/2 ton 2wd C10 thoguh, but is verrrrrryyyy rare to find, only one person or possibly maybe two n this whole forum have a 12 bolt half ton with actual 4.11 in it and is listed on glovebox like it should be if was original good luck ------------------ Randy- Lincoln, IL randy@ccaonline.com 2177353230 *many GM parts bought, traded, or sold -am parting out: '81 Cutlass Supreme Brougham current fleet: -71 C-10 350/CH465/3.07- basketcase -84 Z28 5.0L/700R4/3.73 daily driver -84 Firebird/SE 2.8L/T-5/3.73/engine bad -82 purple Trans Am, project #2 *Paint is overrated* © RSS Enterprises 2000 |
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05-02-2002, 04:02 PM
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#4 |
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Senior Member
Join Date: Apr 2000
Location: Orlando, FL
Posts: 1,076
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I have found that service manuals can be a great help if your unsure of what's involved. Shims can be found at a GM dealer or through a driveline shop. Randy's Ring and Pinion, National Drivetrain, and others should be able to help you out. Many 4x4 outfits could help you also. Here's a few links I had handy.
http://www.drivetrain.com/ http://www.natldrivetrain.com/ ------------------ Orlando,FL 72 Chevy 4x4 3/4T CustomCamper w/SB 406
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............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements. |
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05-02-2002, 05:11 PM
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#5 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,723
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It is possible to reuse the cast iron shim, but getting the new one is the right way.
------------------ 70 GMC 3/4 ton Sierra Grande 402/TH400 72 Jimmy 4WD 4spd 4" & 35's 64 Corvette Coupe 68 Camaro 'vert TPI & TH700 69 Z/28 355 12.6's @110 72 Datsun 240Z-ol' reliable
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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05-03-2002, 11:20 AM
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#6 |
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Registered User
Join Date: Apr 2000
Location: Peru,NY
Posts: 183
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Fast..My book shows K-10 axle Of 3:07 3:73 4:10 and 4:11 for 1970.1971-72 are limited to 3:07 and 3:73 ratio's only.
------------------ 1970 K-10 292 Longbed stepside powersteering but manual brakes!Factory step bumper,Deluxe gauges no Tach 4 speed manual 1 out of 464 made with protectoplate intact.Its basic for a farm truck
__________________
Where Am I ? How did I get Here ? 1970 K-10 292 Longbed stepside (now a stakerack)powersteering ,Factory step bumper,Tow Hooks,Deluxe gauges Tach & Throttle, 4 speed manual 1 out of 464 made with protectoplate intact . |
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