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12-26-2008, 09:52 PM | #1 |
LET'S GO...MOUNTAINEERS
Join Date: Oct 2007
Location: Williamstown, WV
Posts: 339
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Trans sending unit????
I have just replaced the gears from 3.08 to 3.73, where can I find a sending unit that will give me the correct speedo? I have a turbo 350 automatic trans. Thanks for any help.
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12-26-2008, 11:11 PM | #2 |
Too Dumb To Know Better
Join Date: Nov 2005
Location: Texas
Posts: 882
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Re: Trans sending unit????
You can do several things, first change out the gear in the transmission where your speedo cable goes in. You may or may not have to change the gear on the mainshaft of the transmission. The other thing you can do is get a little box that changes the ratio for you. Or you can do a combination of the 2. The little boxes come up on the sales forum occasionally. Good luck.
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12-26-2008, 11:13 PM | #3 |
LET'S GO...MOUNTAINEERS
Join Date: Oct 2007
Location: Williamstown, WV
Posts: 339
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Re: Trans sending unit????
^^ Thanx. I was going to try the gear. Where can you find these?
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12-27-2008, 06:34 AM | #4 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Trans sending unit????
Here is an article on selecting the gears you need and a source link is included in the article.
http://chevelleengineer.home.comcast...eer/speedo.htm Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
12-27-2008, 08:02 AM | #5 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
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Re: Trans sending unit????
Gears your local GM dealer
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1997 GMC Sierra Ext 1965 Mustang |
12-27-2008, 11:45 AM | #6 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,226
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Re: Trans sending unit????
The 350 is easy to calibrate. Take out the driven gear & it will have the number of teeth on it or count them. Try one with about 2 more teeth on it. You can get them from a dealer or Carquest has them in their Motor -Mite line. If you have a trans. shop that will help you, they always have an asssortment of them. After you put it in match the odometer up with the mile markers on the freeway. Then you can change it again if ness. to get it real close.
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12-27-2008, 12:42 PM | #7 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Trans sending unit????
Any tranny shop or go to the Chevy parts counter.
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12-27-2008, 09:03 PM | #8 | |
LET'S GO...MOUNTAINEERS
Join Date: Oct 2007
Location: Williamstown, WV
Posts: 339
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Re: Trans sending unit????
Quote:
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