Having trouble finding the right VSS for T5 swap
Thread Starter
Supreme Member
Joined: Sep 2000
Posts: 1,562
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From: Los Angeles, CA
Engine: LH0 3.1L
Having trouble finding the right VSS for T5 swap
Ok, i'm putting a T5 from an 85 bird into my 90 RS. The 85 bird used a cable speedo. My RS uses an electronic speedo.
I tried to order an electronic VSS for a 90 RS and the sensor they gave me way too big. It had like a 2" diameter. The cable speed sensor is only 1" in diameter.
My question...did GM change the tailshaft and sensor housing when they changed to the electronic speedo's????????? Or should the 2 be interchangeable???
------------------
-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes
-Currently collecting parts for T5 swap
I tried to order an electronic VSS for a 90 RS and the sensor they gave me way too big. It had like a 2" diameter. The cable speed sensor is only 1" in diameter.
My question...did GM change the tailshaft and sensor housing when they changed to the electronic speedo's????????? Or should the 2 be interchangeable???
------------------
-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes
-Currently collecting parts for T5 swap

Member
Joined: Nov 1999
Posts: 429
Likes: 0
From: Fayetteville, Arkansas, USA
Car: 1994 Trans Am
Engine: 5.7L LT1
Transmission: 6-speed
Hey, I have the electronic deal in my cable driven 88 IROC (the tranny is a T-5 out of a 91 Z). I noticed the opening is way too small for the cable driven speedo drive I have. Do u have a cable speedo drive that will fit the small hole? I have the small VSS that u're looking for but I need the cable drive unit in exchange. Also, the tranny is in my car so I can't remove the VSS unless I have the cable drive unit ready to go in.
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'88 IROC 305 TPI
Crappy 700R4 slushbox
Gutted airboxes
180 degree T-stat
Advanced base TPS voltage
Relocated IAT sensor
Momo steering wheel (gotta luv it)
Ram-air setup coming soon
Flowmaster muffler (puke)
Taylor SpiroPro wires
Accel cap and rotor
Ported plenum
Throttle body bypass
Kills: '94 Z28, Olds Aurora V8, bunch of Mustangs, T-birds, ricers, and others who assumed a 12 year-old car would be too slow.
------------------
'88 IROC 305 TPI
Crappy 700R4 slushbox
Gutted airboxes
180 degree T-stat
Advanced base TPS voltage
Relocated IAT sensor
Momo steering wheel (gotta luv it)
Ram-air setup coming soon
Flowmaster muffler (puke)
Taylor SpiroPro wires
Accel cap and rotor
Ported plenum
Throttle body bypass
Kills: '94 Z28, Olds Aurora V8, bunch of Mustangs, T-birds, ricers, and others who assumed a 12 year-old car would be too slow.
Thread Starter
Supreme Member
Joined: Sep 2000
Posts: 1,562
Likes: 0
From: Los Angeles, CA
Engine: LH0 3.1L
<font face="Verdana, Arial" size="2">Originally posted by 88irocz28:
I noticed the opening is way too small for the cable driven speedo drive I have.
</font>
I noticed the opening is way too small for the cable driven speedo drive I have.
</font>
Is the one you have from your 700R4?? The VSS for automatics are like twice the diameter.
Yes, i do have a cable driven VSS from an 85 T5. It's about 1 inch in diameter. Would you be willing to trade??
EDIT: You know what, i'm not sure if this would work because i think the VSS is set up depending on the rear gear ratio. The VSS i have is from a car with 3.42's.
------------------
-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes
-Currently collecting parts for T5 swap

[This message has been edited by CaliCamaroRS (edited August 29, 2001).]
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
The VSS is the same no matter what the gear ratio is. You put whatever speedo gears on it, and that makes it correct. However, make sure you get the right sensor, 4000 pulses or 2000 pulses. I know the MAF TPI uses 2000 pulses and the SD TPI uses 4000 pulses, but I forget on the V6's and TBI's.
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
Member
Joined: Nov 1999
Posts: 429
Likes: 0
From: Fayetteville, Arkansas, USA
Car: 1994 Trans Am
Engine: 5.7L LT1
Transmission: 6-speed
OK, well my T-5 is out of a 91 Z so that would make it a SD then. The gear on the VSS is either tan or white colored, and yes I have the cable speedo drive from a 700R4.
CaliCamaro, is your car MAF or SD? I don't know the rear end ratio of the car that the VSS came from, but I'm hoping that it's color coded like the auto versions. What color is the gear on the cable speedo drive you have?
------------------
'88 IROC 305 TPI
Freshly converted to 5 speed
Gutted airboxes
180 degree T-stat
Advanced base TPS voltage
Relocated IAT sensor
Momo steering wheel (gotta luv it)
Ram-air setup coming soon
Flowmaster muffler (puke)
Taylor SpiroPro wires
Accel cap and rotor
Ported plenum
Throttle body bypass
Kills: '94 Z28, Olds Aurora V8, bunch of Mustangs, T-birds, ricers, and others who assumed a 13 year-old car would be too slow.
CaliCamaro, is your car MAF or SD? I don't know the rear end ratio of the car that the VSS came from, but I'm hoping that it's color coded like the auto versions. What color is the gear on the cable speedo drive you have?
------------------
'88 IROC 305 TPI
Freshly converted to 5 speed

Gutted airboxes
180 degree T-stat
Advanced base TPS voltage
Relocated IAT sensor
Momo steering wheel (gotta luv it)
Ram-air setup coming soon
Flowmaster muffler (puke)
Taylor SpiroPro wires
Accel cap and rotor
Ported plenum
Throttle body bypass
Kills: '94 Z28, Olds Aurora V8, bunch of Mustangs, T-birds, ricers, and others who assumed a 13 year-old car would be too slow.
Thread Starter
Supreme Member
Joined: Sep 2000
Posts: 1,562
Likes: 0
From: Los Angeles, CA
Engine: LH0 3.1L
My car is SD. The gear on the cable VSS is tan/white color. It's from a MAF V6 car.
------------------
-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes
-Currently collecting parts for T5 swap
------------------
-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes
-Currently collecting parts for T5 swap

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