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07-25-2005, 08:12 AM
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#1 |
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Registered User
Join Date: Mar 2005
Location: Melissa, TX
Posts: 799
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Speedo gear color?
How can I determine what speedo gear color I need? Truck had 3 speed now has TH350.
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68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear |
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07-25-2005, 08:22 AM
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#2 |
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You Are Not Forgotten
 
Join Date: Aug 2004
Location: Laurens, SC
Posts: 45
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speedo gear
Go to bowtieoverdrives.com and you can find all info you need.
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If you don't know where you are going, any road will take you there! |
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07-25-2005, 08:24 AM
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#3 |
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Registered User
Join Date: Mar 2005
Location: Melissa, TX
Posts: 799
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That was fast. Thanks.
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68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear |
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07-25-2005, 08:25 AM
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#4 |
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Registered User
Join Date: Mar 2005
Location: Melissa, TX
Posts: 799
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Then don't show anything for a TH350, only OD trans.
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68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear |
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07-25-2005, 08:39 AM
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#5 |
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You Are Not Forgotten
Join Date: Aug 2004
Location: Laurens, SC
Posts: 45
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speedo
sorry fade, bot i thought that the drive and driven gears were interchangeable, good luck in your hunt.
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If you don't know where you are going, any road will take you there! |
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07-25-2005, 09:05 AM
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#6 |
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Senior Member
Join Date: Apr 2005
Location: metro Phoenix, AZ
Posts: 241
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Howdy-
If you have a transmission parts supply house near you, they may be able to help. At a local ( to me in St Petersburg, FL) AC DELCO supplier/ warehouse, I have seen a application guide in which , by transmission type, there was listed, year by year, the make/model, rear end ratio, and then the correct speedo gear by color, number of teeth, and part #. They guarded that info closely until they couldn't find a listing,( they had little old truck info) then they handed me the book to pick something that would work in my truck, as the trans is a common T400. Good Luck! Hope this helps. cowboy33713 |
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07-25-2005, 09:06 AM
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#7 |
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Senior Member
  
Join Date: Jan 2005
Location: CA
Posts: 5,426
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They aren't interchangeable.
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07-25-2005, 12:00 PM
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#8 |
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Registered User
Join Date: Sep 2003
Location: Arizona
Posts: 305
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07-25-2005, 01:20 PM
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#9 |
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Registered User
Join Date: Mar 2005
Location: Melissa, TX
Posts: 799
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So far, none of the sites I have tried actully give a calculator. I need to determine what gear I need for a 3.07 rear and 235*75 R15 Tires.
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68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear |
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07-25-2005, 01:25 PM
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#10 |
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Registered User
Join Date: Jul 2003
Location: North Texas
Posts: 265
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235x75 R15 with a 3.07 rear
Turbo 350 Code:
Finding best gear combo... Drive Gear Driven Gear Correct 20 (brown) 43 (purple) 0.27% 19 (yellow) 41 (yellow) 0.64% 18 (blue) 39 (brown) 1.04% 17 (red) 36 (white) -1.24% 17 (red) 37 (red) 1.48% 18 (blue) 38 (blue) -1.56% 9 (green) 19 (natural) -1.56% 19 (yellow) 40 (black) -1.84% 20 (brown) 42 (green) -2.09% 10 (red or purple) 21 (red) -2.09% 10 (red or purple) 22 (gray) 2.54% 20 (brown) 44 (dark gray) 2.54% 19 (yellow) 42 (green) 3% 9 (green) 20 (blue) 3.51% 18 (blue) 40 (black) 3.51% 17 (red) 38 (blue) 4.08% 17 (red) 35 (orange/pink) -4.13% 18 (blue) 37 (red) -4.3% 19 (yellow) 39 (brown) -4.45% 20 (brown) 41 (yellow) -4.58% 8 (orange) 18 (brown) 4.7% 20 (brown) 45 (light blue) 4.7% 19 (yellow) 43 (purple) 5.26% 18 (blue) 41 (yellow) 5.87% 17 (red) 39 (brown) 6.54% 19 (yellow) 38 (blue) -7.2% 17 (red) 34 (light green) -7.2% 9 (green) 18 (brown) -7.2% 18 (blue) 36 (white) -7.2% 10 (red or purple) 20 (blue) -7.2% 20 (brown) 40 (black) -7.2% 19 (yellow) 44 (dark gray) 7.41% 18 (blue) 42 (green) 8.11% 9 (green) 21 (red) 8.11% 17 (red) 40 (black) 8.87% 19 (yellow) 45 (light blue) 9.47% 8 (orange) 19 (natural) 9.72% 20 (brown) 39 (brown) -9.95%
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'69 C/10 Short Wide 350/400/AC/Tilt/Tach Last edited by /<eystroke; 07-25-2005 at 01:26 PM. |
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07-25-2005, 02:06 PM
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#11 | |
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Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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keystroke- may i ask where you got that info? i need to find out what i need for my th350, i have 275/60/15 rear tires and if i remember right the gear that the cable hooks to is green. i was told the rear gear was 4.10, but i need to check it
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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07-26-2005, 03:37 AM
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#12 |
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Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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http://novaresource.org/speedo.htm uses tire diameter & rear end ratio to tell you what speedo gear ratio you need.
http://tciauto.com/tech_info/speedo_gears.htm converts tire size to tire diameter, and also has a list of gears for different transmissions. Click on part numbers & it will cross-reference with GM part numbers. http://www.bgsoflex.com/speedo1.html may also be helpful. Last edited by jimfulco; 07-26-2005 at 03:38 AM. |
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