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03-16-2010, 06:02 PM
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#1 |
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Registered User
 
Join Date: Nov 2008
Location: Cape cod, ma.
Posts: 394
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when using a 700r4 trans do i need adapter on speedo cable?
my 71 GMC has a 700r4 trans. the speedometer that was on the truck originally will not screw into the 700r4. the truc originally had a TH400 in it. do i need a new aftermarket cable or some kind of adapter on the cable to fit in the trans? thanks
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03-16-2010, 06:24 PM
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#2 |
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Senior Member
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: when using a 700r4 trans do i need adapter on speedo cable?
good question. subscribed, I believe you need a turbo 350 cable though buuuut I could be wrong, I havent tried hooking mine up yet
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1967custom |
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03-16-2010, 07:13 PM
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#3 |
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sharp as a marble
Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: when using a 700r4 trans do i need adapter on speedo cable?
I have done this swap several times, and the existing speedo cable should screw onto the 700r4 trans. Just got finished doing a 200r4, and it screwed right on.
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03-16-2010, 07:17 PM
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#4 |
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Registered User
Join Date: Mar 2008
Location: Las Cruces New Mexico
Posts: 214
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Re: when using a 700r4 trans do i need adapter on speedo cable?
Yup should just screw right in. TH-350 to 700R4 to 4spd manual now and all with the same spedo cable.
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03-16-2010, 07:54 PM
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#5 |
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Senior Member
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: when using a 700r4 trans do i need adapter on speedo cable?
isint a 400 speedo cable different from the turbo 350 though?
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1967custom Last edited by michael bustamante; 03-16-2010 at 07:56 PM. |
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03-16-2010, 07:54 PM
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#6 |
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Registered User
 
Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,887
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Re: when using a 700r4 trans do i need adapter on speedo cable?
Later 700R4's have the VSS sender, older ones have the speedo gears. The tailshafts can easily be swapped and the TH400 should screw right in. Go to the parts store and get a 4wd speedo cable, they're a bit longer and fit perfect.
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
Last edited by LEEVON; 03-16-2010 at 07:55 PM. |
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03-16-2010, 11:17 PM
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#7 |
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Registered User
Join Date: Nov 2008
Location: Cape cod, ma.
Posts: 394
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Re: when using a 700r4 trans do i need adapter on speedo cable?
hey sorry guys but there was originaly a th350 not th400, as for what year the 700r4 is il try to see if i can get some numbers off of it. do u guys know where the numbers would be on the case? thanks
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