> I need to adapt a 1993 2wd 4l60 to a Dana
300, and retain the Vehicle Speed Sensor (VSS). Does the Advance Adapter part number 50-6303 kit have the required components to keep the VSS functional?
Some added data on the specific VSS I have.
A four-pulse (4000 pulses per mile) sine-wave (A.C. current or
alternating current) signal is required by the 1990-1993 TPI,
1992-1993 LT1
engines, and 1990-1993 Camaro 3.1/3.4 V6 engines.

> Thanks Mike

I believe Novak makes an adapter for that.

That adapter should have a provision in it for the VSS. And should even come with a new VSS. This adapter does require you to install a new tailshaft into your transmission too. (new tailshaft will be in the kit).

Call Scott at www.rockbuggysupply.com and he'll hook you up.

Ricky

http://www.painlesswiring.com/fiacc.htm

They go inline with the speedo cable.

CJ

Originally posted by Garza
That adapter should have a provision in it for the VSS. And should even come with a new VSS. This adapter does require you to install a new tailshaft into your transmission too. (new tailshaft will be in the kit).

Call Scott at www.rockbuggysupply.com and he'll hook you up.

Ricky

I have talked with Scott about this swap too, and it appears that the adapter does NOT come setup to deal with the VSS. His AA rep said the best was was to get an aftermarket VSS from JTR (or Painless as mentioned above) and use that on the Tcase speedo output.

Seems very strange to me that AA would make a kit to cover the 4l60/700r4 - Dana 300 swap, yet not address the VSS.

Ed

the bad thing about the in line (speedo cable) speed sensors is if your t-case speedo connection leaks then it'll ruin the speed sensor. my atlas started leaking at the speedo connection and the oil flowed right into the sensor. needless to say the speed sensor is no longer good. i read a post on here a few months ago and it seems the atlas t-cases have a problem with leaking there. my rig is just a trail rig and it works fine for wheeling without the sensor. i can only tell the sensor isn't there when i am on the road and trying to wind it out. your d300 may not have this problem though.

This is the way to go, http://www.novak-adapt.com/catalog/kit_4l63.htm
I wouldn't mess with the speedo VSS, it needs to read transmission output shaft RPM, if you go throught the speedo, you will get a different reading from the speedo gears unless they correct for that. There some of the GM efi systems take different VSS signals so make sure what ever you do puts out the correct signal.

Originally posted by Rock Taxi


I have talked with Scott about this swap too, and it appears that the adapter does NOT come setup to deal with the VSS. His AA rep said the best was was to get an aftermarket VSS from JTR (or Painless as mentioned above) and use that on the Tcase speedo output.

Seems very strange to me that AA would make a kit to cover the 4l60/700r4 - Dana 300 swap, yet not address the VSS.

Ed

Ooops, my bad for assuming:emb4: . I bought AA part number 50-0404 a few months ago. This was for a 1995 4L60E 4wd version to a dana 300. My kit included the provision in the adapter, a new tailshaft, and a brand new VSS.

BTW, this reminds me why do you need the VSS? The engine will run fine without it. I have a '98 Vortech 350 adapter to a TH350, no VSS and works fine. Also have set up 2 Vortech 4.3 swaps one with a 700R and one with a 4L60E. The only thing that happens is the engine will throw a engine check code for the VSS, but does not effect engine perf. They have worked fine for me without. I thought I had to have one also, but called Painless Perf, and that is what they told me it would do and seems to hold true.

Originally posted by Garza


BTW, this reminds me why do you need the VSS? The engine will run fine without it. I have a '98 Vortech 350 adapter to a TH350, no VSS and works fine. Also have set up 2 Vortech 4.3 swaps one with a 700R and one with a 4L60E. The only thing that happens is the engine will throw a engine check code for the VSS, but does not effect engine perf. They have worked fine for me without. I thought I had to have one also, but called Painless Perf, and that is what they told me it would do and seems to hold true.

I dunno. :D I assumed since it was there, it would be good to reinstall.

Mine's a 1993 700r4 / 4l60 behind an LT1 out of a Camaro. So programming it out of the ECM could be as good an answer as reinstalling? Like High5 said, doesn't it possibly cause issues as you wind the motor up? I want this thing to run as well as it did in the Camaro and not have any stalling or bogging issues.

Ed

Sunray. Just do it. I know it is hard.

Originally posted by wngrog
Sunray. Just do it. I know it is hard.

Not hard, just investigating all my options to find the most economical route. I only have "X" dollars to spend, and hopefully "X-1" dollars of work to have done. ;)

Scott DOES have outstanding prices on AA stuff.

Ed

So what are the downsides to not having the VSS? The Jags that run site indicates these problems:

http://www.jagsthatrun.com/Pages/SpeedSensors_Speedometer.html

This is enough to scare me off and take it to Sunray if accurate.

Ed

the only thing i can tell with my '99 vortec 350 is that when in high range on the streeet and i am trying to hammer it it just doesn't feel like it gives all that it is capable of. it is still not a dog by any means though. in low range i can not tell a difference. i don't get any kinda of stalling or popping or anything other than a slight lag on the road as i mentioned.

i would like to have mine working again just because. i'll probably buy another sensor once/if i get the leak in my atlas fixed.

Ed.
They are right, we have fixed plenty of peoples home installs and lots of them involved the VSS. We put it in the tranny so the adapter is only 3/4" instead of the old 5.5" adapters. Its easy stuff, just get it over here.
Lance

Originally posted by Rock Taxi


I have talked with Scott about this swap too, and it appears that the adapter does NOT come setup to deal with the VSS. His AA rep said the best was was to get an aftermarket VSS from JTR (or Painless as mentioned above) and use that on the Tcase speedo output.

Seems very strange to me that AA would make a kit to cover the 4l60/700r4 - Dana 300 swap, yet not address the VSS.

Ed

Really, this is AA we're talking about. :flipoff2:

I have one for my TPI that's a passthrough unit, I believe I got it from Fuel Injection Specialties in San Antonio or something. Never did bother to use it, the older motors, at least run fine without it. I believe JTR cited mileage and performance issues, but...I know in CA and probably other states, you need it or the computer will throw a code that they'll fail you for or some such...

Bryan

Originally posted by lanzg
Ed.
They are right, we have fixed plenty of peoples home installs and lots of them involved the VSS. We put it in the tranny so the adapter is only 3/4" instead of the old 5.5" adapters. Its easy stuff, just get it over here.
Lance

Ed Westerbeckstein.

Originally posted by lanzg
Ed.
They are right, we have fixed plenty of peoples home installs and lots of them involved the VSS. We put it in the tranny so the adapter is only 3/4" instead of the old 5.5" adapters. Its easy stuff, just get it over here.
Lance

Ok Lance,

Check your email for this and other questions / work to be done. :D

Ed

Edberg Westerbeckstein

Bwaaaahaaaahaaaa!
LG

When you are looking at the need for a VSS be sure consider the need.
** You may want a VSS signal for the engine: As you accelerate and/or decelerate your engine is going to see a different load brought on by a bunch of different things; transmission drag, hard braking, whatever. Your engine has a programmed idle speed within the ECU and the Idle Air Control Valve will adjust automatically to try to achieve the targeted idle in light of the drag mentioned above. This comes into effect mainly when your foot is completely off the gas pedal the engine is dropping back to a no-load condition. The VSS sends a varied signal that the ECU reads as a shaft speed reduction rate and the IAC motor adjusts accordingly to maintain the air to fuel ratio. * This type of VSS need is commonly taken from the back of the tcase using a hall effect sensor or a thru-cable style plulse generator. * If this is the only need for a VSS, your adapter doesn't need a provision for the sensor.

** If you want a VSS to manage the shift points of a 4L60E:
The shift points are programmed into the ECU and they are managed as a function of transmission output shaft speed and also the rate of change of that speed. When you are in 2HI, the transmission output shaft speed has a true correlation to speed and acceleration/deceleration RATE of the driveshaft. If you mount the sensor in front of the tcase (in the adapter), the ECU will always read tranny shaft speed no matter if you are in high range or low range.
* If you mount the sensor in the tail of the tcase, the VSS will pick up a slower shaft speed (if in low range) than the speed of the transmission shaft . Your computer won't know any difference and it will continue to send "rpm" based shift commands to the 4L60E. This is why it is common to hear folks complain that their shift points are wierd when in low range. In the OEM truck application, there is a pin on the computer plug that acknowledges the activation of low range. When this happens, thh 4L60E shift points follow a different program to account for the 2.72:1 range reduction. Tripping that pin connection with your tcase shift lever is another story but it works well if you are using the stock ECM 4x4 program for the 4L60E.
** If your ECM can't acknowledge low range to the 4L60E you may experience low range shift flaws such as:
Early upshifts in low range-VSS sensor located in the adapter
Late upshifts in low range-VSS sensor in the tcase tailhousing

Hope this helps; sorry for the long message - John; www.jbconversions.com.