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09-01-2013, 12:06 AM
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#1 |
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Registered User
Join Date: Jun 2010
Location: Manitoba
Posts: 223
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speedometer help
Hello, I am in need of some advice, I really need to get the speedo working in my truck before I get nailed for driving to fast...
I have a 77 chev, it has 295/50r-15 rears, running 3:73 gears, I installed a 700r4 from a 93 truck into it, had an electric gauge drive, so switched it over to the bits from an 80's 700r4 with mechanical drive, the speedo sits pegged all the time, if I put a ratio adapter in it slows it a bit but still not close. Where do I start? what gears do I need on the tail shaft, and speedo drive gear? or am I hooped with the ratio/tire size I am running any help would be great thanks |
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09-01-2013, 03:43 PM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: speedometer help
To keep from getting a ticket you could borrow a GPS to see what your speed actually is.
There's a transmission/speedometer site that tells you what you need to check but I don't have the url handy. Maybe someone else can post it for you.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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09-01-2013, 08:17 PM
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#3 |
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No No
Join Date: Jun 2005
Location: Pueblo Colorado
Posts: 1,781
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Re: speedometer help
You need to figure out how fast you are going before you can decide on speedo gears. GPS would be great for that. http://www.transmissioncenter.net/sp...n_______va.htm
Posted via Mobile Device
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1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler |
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09-01-2013, 10:48 PM
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#4 |
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Registered User
Join Date: Jun 2010
Location: Manitoba
Posts: 223
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Re: speedometer help
ya I have carried my gps, and cruising speed is around 2200rpm, but I have unhooked the speedo drive, cause it just bounces off the peg all the time.
will look into the transmission center thanks |
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09-02-2013, 09:18 AM
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#5 | |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: speedometer help
Quote:
Let us know how you do.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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