Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Speedo operation Q ???

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Old Oct 14, 2009 | 05:45 PM
  #1  
ZONES89RS's Avatar
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Speedo operation Q ???

Well, wifes 700R crapped in my 86 (her) TA, i removed the trans in favor of a 91 truck 700R and swapped tail housings, it has the metal sleeve and magnetic style speedo setup instead of gear driven on hers, can i splice the truck style plug in to get it to work or is there more PITA work to it than that?

Never ran into this problem before.
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Old Oct 17, 2009 | 11:43 AM
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Nobody have a clue?
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Old Oct 17, 2009 | 02:24 PM
  #3  
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From: Leicester,Massachusetts
Car: 1983 CHEVROLET CAMARO Z28
Engine: Forged 355 with a GT45 turbo
Transmission: TKO 600
Axle/Gears: built 4th gen rear with 3.27s
Re: Speedo operation Q ???

yes you should be able to .. use the connector from the newer trans and wire it into the 86....it should be 2 wires anyways
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Old Nov 2, 2009 | 11:30 AM
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

I wonder how it will be, the original gear was a 2.73 and i swapped it to a 3.23, so if it has a 3.23 in the truck the trans cam out of it might be right.
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Old Nov 2, 2009 | 05:05 PM
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dyed's Avatar
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From: Kansas
Car: 84 Z/28
Engine: 350
Transmission: 700R4 - rebuilt by me
Axle/Gears: 3.73 posi
Re: Speedo operation Q ???

Ok, it sounds like you're making this far harder than it needs to be. Reuse the old speedo parts, all of them. If you changed the rear end gear, you will need to change gears accordingly. I'm too lazy to type it all out, call if you want.

David

913 620 0963
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Old Nov 5, 2009 | 08:25 PM
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Well, then it should work i would hope. The problem is, the hook up for the trans am is not the same as the trans from the truck. I could nto swap it all out on the tail shaft since it had that sleeve i could not figure out how to remove...if you can even remove it.
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Old Nov 5, 2009 | 09:48 PM
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From: Kansas
Car: 84 Z/28
Engine: 350
Transmission: 700R4 - rebuilt by me
Axle/Gears: 3.73 posi
Re: Speedo operation Q ???

It can be removed. Look in the tech articles for pics but there is a little spring clip you need to fight with. Also, it is very nearly press fit, so... hammer time. Carefully.
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Old Nov 5, 2009 | 10:42 PM
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Well, if i can get the pig tail fro the truck and splice it, that is the way i will go, other than that, i will have my trans guy do it since it is his bag. He wont charge much if it is reall possible.
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Old Nov 5, 2009 | 11:52 PM
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From: Kansas
Car: 84 Z/28
Engine: 350
Transmission: 700R4 - rebuilt by me
Axle/Gears: 3.73 posi
Re: Speedo operation Q ???

Is the speedo in the car electronic? My 86 was mechanical. If electronic, they should be roughly interchangeable.
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Old Nov 7, 2009 | 11:17 PM
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Yea, it is electric.
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Old Nov 7, 2009 | 11:22 PM
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From: Concordia Kansas
Car: 1987 Iroc Z 1990 RS 1991 RS
Engine: 454 soon 496
Transmission: Soon T56
Axle/Gears: 308 Posi
Re: Speedo operation Q ???

Weird my 86 is mechanical but its camaro.
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Old Nov 7, 2009 | 11:48 PM
  #12  
ZONES89RS's Avatar
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Trust me, i was baffled too when i got the car 8 years ago. I was like, WTF? My 89 RS has a mechanical but my 86 TA is electric????....i give...LOL.
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Old Nov 8, 2009 | 07:03 AM
  #13  
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Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Speedo operation Q ???

"Birds" electric, 86 (IIRC)-92
Camaros, electric, 90-92

JamesC
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Old Nov 8, 2009 | 10:17 AM
  #14  
dyed's Avatar
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From: Kansas
Car: 84 Z/28
Engine: 350
Transmission: 700R4 - rebuilt by me
Axle/Gears: 3.73 posi
Re: Speedo operation Q ???

So, I would say, use the pickup and sleeve from the old tranny. Reluctor rings are generally the same for 700s.
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Old Nov 9, 2009 | 02:17 AM
  #15  
ZONES89RS's Avatar
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From: Hou. TX
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Speedo operation Q ???

Originally Posted by JamesC
"Birds" electric, 86 (IIRC)-92
Camaros, electric, 90-92

JamesC

??? Wow, did not know that!
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