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03-17-2021, 09:36 PM
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#1 | |
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Registered User
Join Date: Nov 2011
Location: 19
Posts: 607
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88-up speedo
Are they all electric speedos, working on a swap in my 93 and would need a cable driven speedo.
Does the engine computer control the speedo ? Thanks
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1999 Chevy K2500 RCLB 350 4L80e 2004 Chevy 3500 C&C Dmax Allison Quote:
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03-18-2021, 05:07 AM
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#2 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,453
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Re: 88-up speedo
After 88 they are electric speed-o-meter. I’m pretty sure it goes thru the ECM. I had an 89 that I SAS’s with no speedo, CEL for no VSS or speed signal something or other.
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03-18-2021, 09:23 AM
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#3 | ||
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Registered User
Join Date: Nov 2011
Location: 19
Posts: 607
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Re: 88-up speedo
Quote:
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1999 Chevy K2500 RCLB 350 4L80e 2004 Chevy 3500 C&C Dmax Allison Quote:
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03-18-2021, 09:30 AM
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#4 |
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Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,589
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Re: 88-up speedo
93 should have a VSS buffer box thats separate from the ECM, it receives the signal first from the sensor on the transmission and then sends the conditioned signal to the speedometer, ecu, etc.
https://harristuning.com/Tbi/vssb-drac-calibration/ http://www.tradecraftspecialties.com/DRACmodule |
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03-18-2021, 11:27 AM
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#5 | ||
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Registered User
Join Date: Nov 2011
Location: 19
Posts: 607
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Re: 88-up speedo
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I think I should stick with leaving it TBI and the 4L60e, I just want something to cruise around with.
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1999 Chevy K2500 RCLB 350 4L80e 2004 Chevy 3500 C&C Dmax Allison Quote:
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03-19-2021, 05:12 PM
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#6 | |
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Registered User
Join Date: May 2004
Location: Minnesota
Posts: 4,620
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Re: 88-up speedo
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Good accurate information. The VSS buffer is also known as the DRAC
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For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. |
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03-19-2021, 07:00 PM
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#7 | |
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Registered User
Join Date: Jun 2014
Location: Orlando Florida
Posts: 1,598
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Re: 88-up speedo
VSSB and DRAC are two different things, as shown in the link. Modified DRAC on the left, unmodified VSSB on the right.
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03-23-2021, 10:39 AM
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#8 |
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Registered User
Join Date: Sep 2009
Location: Beaverton, OR from WA State
Posts: 1,515
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Re: 88-up speedo
The cluster plug changes in '92, so for your '93 the range you'll be looking for is '92-'94, unless you want to cut into the dash and repin the connector to the earlier style.
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Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96 |
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