speedo with th400

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Jan 3, 2002 | 11:11 AM

BlownBird

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Joined: Jul 2001

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From: NewCastle,DE USA !

speedo with th400

I have an 88 Firebird with a newly installed th400. Is there any way to retain my factory speedo operation? Any companies out there making an adaptor that will convert the mechanical output to a useable signal? Is there a tailshaft out that will bolt up to the th400 and give the appropriate signal? I have not had a driveshaft made yet, so switching the tailshaft won't hurt a bit. Thanks in advance, Don Barnett

Jan 3, 2002 | 07:57 PM

buickman

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Joined: Dec 2001

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From: Oklahoma

well, know that TCI makes an adapter for converting an electrical signal to a cable drive, you might check thier site or contact them. www.tciauto.com might also check www.hughesperformance.com

Jan 3, 2002 | 08:15 PM

Apeiron

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From: Mercedes Norte, Heredia, Costa Rica

Car: 1984 Z28 Hardtop

Engine: 383 Carb

Transmission: 4L60

Axle/Gears: 3.54 Dana 44

The TH400 uses the same speedometer gears as the TH700R4, so you should be able to take the VSS from a car with an electronic speedo and just stick it in.

No wait. Sorry, I lied.. the housings are different depths.

Jan 4, 2002 | 05:49 PM

Jay 727

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From: FL

Quote:

Originally posted by Apeiron
The TH400 uses the same speedometer gears as the TH700R4, so you should be able to take the VSS from a car with an electronic speedo and just stick it in.

No wait. Sorry, I lied.. the housings are different depths.

The diameter of the speedo housing is different also. I tried that before. 700R4 is 2" 400 is 1 7/8".