4x4 vss with cable speedo - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85burb · 08-30-2018, 09:27 PM

I need some help. My truck has had a 6.0 in it for years. Now I’m going to a4l60e from a 700r4. I need a vss that I can use with my cable speedo. I have a samosa digital one now and the best I can get is 3 mph at about 75 mph actual road speed. It has not been and issue but with the new trans I will have to have it working better. Is there something I can change in the programming to help or do I need a better vss sensor?

**mongocanfly** · 08-30-2018, 09:43 PM

Do you mean its off 3 mph at 75?..I have a Dakota digital convetor in mine and it's dead on...
If your changing the pulse to a cable I wouldn't think it'd be the vss

85burb · 08-30-2018, 09:53 PM

My cable speedo reads 75 mph and the ecm sees 3mph.

Wildkarde · 08-30-2018, 10:37 PM

If you are using a 4l60e behind an LS you need to use the stock VSS and a cable drive convertor.

Something like this http://www.dakotadigital.com/index.c...rod/prd886.htm

**mongocanfly** · 08-30-2018, 11:08 PM

That's the one I used...

**JMac11** · 08-31-2018, 11:09 AM

I have the same issue, inline VSS, CPU sees about 10% of actual speed on mine. Not a problem on drivability but want to solve so I can hook up cruise.

Wildkarde · 09-01-2018, 12:17 AM

The GM computer is expecting 40 pulses per output shaft resolution, which is 80,000 plus pulses per mile, depending on exact tire size/gear ratio. Most of the aftermarket VSS setups are like 8,000 or 16,000 pulses per mile. You can change the pulses per mile with something like HPTuners, but im not sure if the computer will be happy with numbers that low, never tried it.

85burb · 09-01-2018, 08:16 AM

I have hptuners. I’m going to attempt to change the ppm around before buying anything else. Hope to have the trans in this weekend. So I’ll let y’all know how things work out. Thanks for the help so far.

**JMac11** · 09-21-2018, 12:09 PM

any word on this?

85burb · 09-21-2018, 12:14 PM

I just changed my pcm settings. It does not read super stable but it reads.

08-30-2018, 09:27 PM	#1
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	4x4 vss with cable speedo I need some help. My truck has had a 6.0 in it for years. Now I’m going to a4l60e from a 700r4. I need a vss that I can use with my cable speedo. I have a samosa digital one now and the best I can get is 3 mph at about 75 mph actual road speed. It has not been and issue but with the new trans I will have to have it working better. Is there something I can change in the programming to help or do I need a better vss sensor? __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

08-30-2018, 09:43 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,579	Re: 4x4 vss with cable speedo Do you mean its off 3 mph at 75?..I have a Dakota digital convetor in mine and it's dead on... If your changing the pulse to a cable I wouldn't think it'd be the vss __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

08-30-2018, 09:53 PM	#3
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: 4x4 vss with cable speedo My cable speedo reads 75 mph and the ecm sees 3mph. __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

08-30-2018, 10:37 PM	#4
Wildkarde Registered User Join Date: Mar 2018 Location: Ardmore Posts: 100	Re: 4x4 vss with cable speedo If you are using a 4l60e behind an LS you need to use the stock VSS and a cable drive convertor. Something like this http://www.dakotadigital.com/index.c...rod/prd886.htm

08-30-2018, 11:08 PM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,579	Re: 4x4 vss with cable speedo That's the one I used... __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

08-31-2018, 11:09 AM	#6
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: 4x4 vss with cable speedo I have the same issue, inline VSS, CPU sees about 10% of actual speed on mine. Not a problem on drivability but want to solve so I can hook up cruise.

09-01-2018, 12:17 AM	#7
Wildkarde Registered User Join Date: Mar 2018 Location: Ardmore Posts: 100	Re: 4x4 vss with cable speedo The GM computer is expecting 40 pulses per output shaft resolution, which is 80,000 plus pulses per mile, depending on exact tire size/gear ratio. Most of the aftermarket VSS setups are like 8,000 or 16,000 pulses per mile. You can change the pulses per mile with something like HPTuners, but im not sure if the computer will be happy with numbers that low, never tried it.

09-01-2018, 08:16 AM	#8
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: 4x4 vss with cable speedo I have hptuners. I’m going to attempt to change the ppm around before buying anything else. Hope to have the trans in this weekend. So I’ll let y’all know how things work out. Thanks for the help so far. __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

09-21-2018, 12:09 PM	#9
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: 4x4 vss with cable speedo any word on this?

09-21-2018, 12:14 PM	#10
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: 4x4 vss with cable speedo I just changed my pcm settings. It does not read super stable but it reads. __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle



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