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12-14-2007, 11:52 AM
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#1 |
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1975 C-10 Silverado LWB
Join Date: Nov 2007
Location: Sacramento, CA
Posts: 326
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Transmission help!
So on my truck, there is a little problem with something that connects from the spedometer/odometer cable to the transmission, it supposedly adjusts the speed so the spedometer is accurate (dont know the name of it). unfortunately it broke on the truck so the spedometer and odometer are off by some 11%? the ratio on the part said something like 1:0.9something. can i just find a turbo 400 in a junkyard and pull it off and swap it, or am I screwed? do they sell new ones?
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12-14-2007, 12:41 PM
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#2 |
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Wishin' I had more money!
Join Date: Feb 2007
Location: Eugene, OR
Posts: 1,242
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Re: Transmission help!
You can get a new speedo gear from a driveshaft or rear end shop usually. I guess you could get one from a junk yard, but you'd have to know what rear gears the junkyard truck had in it, along with yours.
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12-14-2007, 12:46 PM
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#3 |
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: Transmission help!
You can still get these gears from GM...
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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12-14-2007, 01:25 PM
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#4 |
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Registered User
Join Date: Oct 2005
Location: Pittsburgh, Pa
Posts: 106
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Re: Transmission help!
Check out www700raptor.com You'll have to give them the percentage of speed you are out.. You may have to figure out the percentage.. Marvxyz1
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12-14-2007, 01:25 PM
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#5 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,310
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Re: Transmission help!
On some th400s ive seen this metal box type of thing that the speedo cable screws into and that in turn screws into the trans into where the speedo cable usually goes is that what youre talking about?
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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12-14-2007, 01:31 PM
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#6 |
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1975 C-10 Silverado LWB
Join Date: Nov 2007
Location: Sacramento, CA
Posts: 326
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Re: Transmission help!
sort of like that, its kindof in the shape of an "L" one goes to the transmission, the other to the cable. it has some gears inside, but thats about all i know. oh, and that the one i have is broken
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12-14-2007, 02:22 PM
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#7 |
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Registered User
Join Date: Dec 2007
Location: Garner ,NC
Posts: 66
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Re: Transmission help!
Find a local speedometer shop and they should have one on the shelve .
I used to work on 18wheeler's and kept a bunch at the shop because they fell apart after a few hundred thousand miles . the pice you are talking about is a reduction box to keep the speedometer accurate . also GM should have them and they are fairly cheep. |
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