Alternative VSS to the JTR?

[WT91]

I ordered a 2 PRS speed sensor for my TBI setup back in the middle of February. Jags that run took my money from PayPal and has had it now for coming up on 3 months. I've called them twice and both times I have gotten the same story that the parts are being made and that they will ship whenever they are done. The guy on the phone even said that it could be a few more months. I am planning on taking this truck on a trip in 3 weeks. Is there any alternative vehicle speed sensor that can be made to work with a 7427 TBI set up?

I can understand that these are custom parts that are made in house but there was nothing on their website that even hinted at a possible six-month lead time. At this point I am going to be getting a refund and don't plan on sending money in their direction again.

[babywag]

Not that I'm aware of...You could use a GM buffer box dealio to convert and utilize the stock cruise sensor signal.
I forget who, but someone on ifsja wrote something up?
Maybe Woodchomper?

[jpswapmohn]

Not sure if this is what you are after, but the Novak kit I used to tie my 4L60E to the NP229 (yea, thats gone..I didn't know better back in '04..) came with a VVS that mounts into the tail of the 4L60E and reads off a ring on the tailshaft (also part of the kit). It talks to the ECM and I still have manual speedometer out of the transfer case (now an upgraded NP242).. Maybe they have something that you can use? They are good to work with and tech support was great, assuming they have not changed in the last 12 years. Damn, has it been that long? No wonder I am contemplating a 6L/6L80 upgrade..

[WT91]

Dakota Digital apparently sells a converting box that multiplies/divides incoming VSS signals for you. For $80, it's a hair less expensive than the JTR VSS. I think I am going to go with that device and the stock Wagoneer 8k VSS.

[babywag]

Just in case you didn't know…

The 7427 has the ability to accept either the the 40 pulse signal, or the 2 pulse signal.
Just a setting in the .bin that needs to be changed for the 2 pulse, and pinout on pcm connector(s) of course.

[WT91]

I know the 7427 has the ability to accept different VSS pulses per rev, but I have no idea how to program it to accept the 8 pulse per rev VSS in the Wagoneer.

[Bill usn-1]

If you want to spend $150+ you can call Howell. They are sourcing from a different supplier now.

[babywag]

I know the 7427 has the ability to accept different VSS pulses per rev, but I have no idea how to program it to accept the 8 pulse per rev VSS in the Wagoneer.

What I meant was it'll also take a 40 pulse signal, and pretty sure I've seen universal driveshaft mounted 40 pulse deals for cheaper than $80??

[WT91]

I've also seen the universal driveshaft mounted ones, but I'm not a huge fan of that design. Doesn't seem like it'd last very long in an off road truck.

I ended up with the Dakota box and it works fine, does the job as advertised and saved me $17. Can't complain. Thanks all for the help.

[Nikkormat]

I've also seen the universal driveshaft mounted ones, but I'm not a huge fan of that design. Doesn't seem like it'd last very long in an off road truck.

I ended up with the Dakota box and it works fine, does the job as advertised and saved me $17. Can't complain. Thanks all for the help.

That's cool too, because now you can run an electronic speedo.

Does anyone know if there is a replacement unit available for our VSS's if they go out?

[WT91]

That's cool too, because now you can run an electronic speedo.

Does anyone know if there is a replacement unit available for our VSS's if they go out?

In my 20~ minutes of internet searching, I have to say no. I haven't been able to find one. Maybe if I had a part # that I could search directly I could come up with something, but the internet has nothing for a vehicle speed sensor for a 1989 Grand Wagoneer.

Guess that's another bonus of the Dakota digital box...when/if my VSS ever goes out, I can just grab any in-line VSS from any vehicle and use the Dakota to convert the signal to something useful.

[cmaje72]

Dakota digital sells a 8k inline vss for about $45. The stock wag VSS for the cruise control is also 8k. I use a stock wag VSS for the efi in my setup. What code are you running on that 7427? I'm pretty sure you can set that ecu up for the 8k vss but I would have to look at the parameters available.

[FSJ Guy]

The setting is simply labelled "VSS not from DRAC" or something like that.

I'm not sure what type of signal it expects from the DRAC, but when this box is checked, it lets you use the 2000 pulse VSS such as the 2PRS which is now no longer available.

[WT91]

I'm running the $OE mask. The computer can take either a 4k or 2k signal, not an 8k. I looked all up and down gearhead-efi looking for a solution. Saw a few people talking theory but no actual working implementations.

Glad Dakota sells a reasonably priced 8k replacement unit. Will have to remember that if my stocker goes out.

[cmaje72]

So I dusted off the old OBD1 laptop and took a look at the various settings and ecu code you guys are correct. Ecus from applications that had a DRAC will only work with a 2k square wave VSS for engine functions. There does not appear to be a setting for vss type and a road speed constant on these (I only quickly skimmed the hacks so I could be wrong). For tranny functions we could trick it into using a 8k vss without the drac but the 8k signal may be a little low resolution for trans control..

[JeepsAndGuns]

You could try a speed sensor for a 91 YJ, that is as far as I can tell, a 8k sensor. Then use the dakota digital converter box.

http://www.rockauto.com/en/moreinfo.php ... 05&jsn=353

http://www.dakotadigital.com/index.cfm/ ... prd126.htm

You could also use the sender from dakota digital along with the above converter box. The YJ sender does not look like it will hook to the original waggy cable. The dakota digital one should work in pass through fine.

http://www.summitracing.com/parts/dak-sen-01-4160