Possible to adapt the Chevy VSS to run Jeep speedo? - JeepForum.com
LinkBack Thread Tools
post #1 of 4 Old 07-02-2011, 11:51 AM Thread Starter
Registered User
1992 YJ Wrangler 
Join Date: Oct 2010
Location: New Orleans
Posts: 290
Possible to adapt the Chevy VSS to run Jeep speedo?

I'm in the planning stages of a tbi350/4l60e swap. At the moment I am trying to decide how I want to handle the transfer case.

As I see it, there are several options:

1. Run the np241 that I have with this combo (1993 Z71 truck). I can get the super short sye and keep the overall length down to a reasonable level. The only problem so far is that I am unable to find information on getting the Jeep speedo to work off of the Chevy VSS since they do not use compatible signals. For me to go this route, I'd have to be able to buy an adapter to make the factory speedo work. I'd rather not have to spend money on all new gauges.

2. Use the front case half from an NP231/233c and adapt my np231j to the 4l60e. This would retain my Jeep vss and allow my speedo to work. To keep the chevy pcm happy, I'd have to add a reluctor ring and sensor to the tail of the 4l60e. Cost for this is $60 for a 233c from the local "pull it yourself" boneyard and ~$100 for the vss/reluctor ring kit. I'll probably still need an sye kit due to the length of the engine/tranny/tc combo. This is currently my likely choice unless someone has a better idea.

3. Buy the adapter kit from Novak/Advance to make my 231j fit the 4l60e. This is kind of like option 2 except it's more expensive. $500+ for the kit. And again, I will likely need a sye anyway due to length.

So does anyone know of a way to make the Jeep speedo work with the chevy vss? Anyone see a better idea than what I mentioned above?

AaronJ is offline  
Sponsored Links
post #2 of 4 Old 07-02-2011, 07:12 PM Thread Starter
Registered User
1992 YJ Wrangler 
Join Date: Oct 2010
Location: New Orleans
Posts: 290
Bumping this for the evening crowd.
AaronJ is offline  
post #3 of 4 Old 07-02-2011, 08:36 PM
Registered User
1999 TJ Wrangler 
Join Date: Sep 2008
Location: michigan
Posts: 427
I have a Vortec 350/ 4l60e/ 231chd in mine! I found the trans to transfercase adaptor on ebay for $45. I added the Advance Adaptor 40 pulse reluctor ring to the tall shaft of the tranny. To make the speedo work, I got ahold of Dakota Digital! They sell a little device that changes the signal. I think it was around $80. The slick part of it is you can always adjust it for gear or tire size. I calibrated it with my gps and its right on the money from zero to as fast as I want to go. With the VSS signal comeing from the tranny and not the t-case, it might shift funny in low range. The guy that made my wireharness left me a wire that I had to put on a switch for when I am in low range. Im also using My stock tach! I had to do some surgery on it (changed a resister inside it) but its pretty close now. Hope this helps.
rinking is offline  
post #4 of 4 Old 07-02-2011, 09:00 PM Thread Starter
Registered User
1992 YJ Wrangler 
Join Date: Oct 2010
Location: New Orleans
Posts: 290
Do you have something like this?: http://www.dakotadigital.com/index.c...rod&prd126.htm

Also, did you ever do a build thread on your swap? Can you go into detail about getting your tach to work?

As much info as you care to provide would be great. I think I've read every swap thread on this site (and several on other sites) and there are still some "knowledge gaps".
AaronJ is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
rough country rock sliders for TJ adapt to YJ? Toms87 Wrangler General Discussion 16 07-17-2010 10:04 AM
Need to adapt front driveshaft to NP241C treefiddyYJ YJ Wrangler Technical Forum 3 11-11-2009 02:37 PM
NP208 Input gear to adapt to 700R4? Root Moose YJ Wrangler Technical Forum 3 11-27-2008 11:31 AM
84 chevy 350 in my JEEP raZe YJ Wrangler Technical Forum 8 09-27-2004 01:54 PM
Adapt a yj hardtop to a tj??? Wingryder TJ Wrangler Technical Forum 1 11-24-2003 10:39 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome