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12-29-2011, 06:00 PM
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#1 |
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Registered User
Join Date: Nov 2009
Location: Hazlehurst, Ga.
Posts: 822
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speedometer not working after trans replaced
I bought a truck and the transmission was just replaced. The guy I got truck from had just bought it and put a trans in it. Well my mechanic told me the trans is a newer model with electronic speedometer and I have original mechanic. Do they make an adapter to remedy this or will my mechanic have to open bell housing and replaced the magnet there with gears?
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1972 Custom Deluxe LT1 Gen V Swap "Green Lantern" 1984 Silverado Red Baron-72 c10 Project |
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12-29-2011, 10:29 PM
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#2 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: speedometer not working after trans replaced
don't know but have seen where a shop didn't put a gear in because they didn't know the rear end,but that was a th350
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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12-30-2011, 11:06 AM
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#3 |
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Registered User
Join Date: Feb 2008
Location: Hickory, NC native, but stuck in Valdosta, Ga
Posts: 615
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Re: speedometer not working after trans replaced
I put A 700r in my truck and the mechanic had to get some sort of adapter for it to convert it back to the 84 style mechanism. I'll asked him what he had to do!!!
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01-03-2012, 11:08 AM
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#4 |
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Registered User
Join Date: Nov 2009
Location: Hazlehurst, Ga.
Posts: 822
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Re: speedometer not working after trans replaced
Id appreciate the info when you get a chance.
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1972 Custom Deluxe LT1 Gen V Swap "Green Lantern" 1984 Silverado Red Baron-72 c10 Project |
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05-04-2012, 10:35 PM
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#5 |
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Registered User
Join Date: Dec 2010
Location: Houston Tx
Posts: 12
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Re: speedometer not working after trans replaced
Did u ever figure this out
Posted via Mobile Device |
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05-05-2012, 12:07 AM
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#6 |
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Registered User
Join Date: Sep 2009
Location: westbank bc
Posts: 239
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Re: speedometer not working after trans replaced
I got a 76 with a 350 and a 700r4 when I got the truck and the speedo worked exact then when the trans crapped out my buddy pulled it and put a 350 turbo in and the speedo stopped working, my luck that one crapped out two weeks after and I got it tow'ed to a trans shop and got the guy to rebuild my 700 and put it back in and now the speedo reads half my speed.guy said the clip didn't fit? I have no clue how to fix it so if you can fix yours please post ASAP it would be much help
Posted via Mobile Device |
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05-05-2012, 12:14 AM
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#7 |
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Registered User
Join Date: Nov 2009
Location: Hazlehurst, Ga.
Posts: 822
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Re: speedometer not working after trans replaced
I ended up buying the old style gear and my mechanic put it into the place of the newer magnet and it worked fine.
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1972 Custom Deluxe LT1 Gen V Swap "Green Lantern" 1984 Silverado Red Baron-72 c10 Project |
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05-05-2012, 09:06 AM
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#8 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: speedometer not working after trans replaced
Quote:
It sounds like he put the wrong drive gear on the mainshaft because he couldn't get a replacement clip to fit the original. I'd ask him to give you back your original drive gear. I'd also ask for the color and tooth count of the new one.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
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