Which speedo to buy?

[tshearer]

Hey guys,

I'm another newbie to all of this but am hooked for life. I recently bought an 89 YJ that has a Chevy 350 and Turbo 400 AT. I'm running it on 33" tires now on the stock D35 3.55s.

The problem is there is no speedo in it at all. I was pulled over last week and issued a warning so I figure it might be best to install a speedo.

Will a used YJ speedo work with the Chevy transmission or do I need a different one? Do I hook the speedo cable to the transmission or transfer case?

Thanks a million,
Tom

 

[Bounty__Hunter]

In stock form, the mechanical speedo of an '89 is hooked to the rear output of the transfer case. Which transfer case was used in your engine/transmission swap?

 

[tshearer]

OK, I checked on the transfer case. It is a Chevy/GM 241C w/ 2.72 ratio. I saw where the speedo cable attaches as well. Does this mean I should go with a Chevy speedo and cable?


Thanks again,
Tom

 

[redrooster]

A YJ speedo and speedo cable should hook right up to the 241. The only thing is that it will be a few mph off with the 33's. You can get replacement gears for the speedo drive or get the Truspeed from Superlift.

 

[Bounty__Hunter]

The truspeed would likely be for an electronic speedo, right? His '89 shoud be mechanical, and shoud plug into the 241c using the stock jeep parts.

 

[redrooster]

Yes, Truspeed is for electronic speedo. Yours "should" be mechanical. You would use the Truspeed if you had a vehicle running EFI (TBI, TPI or Vortec 350's)which required use of the speed sensor for the ECM's calibration of the timing curve.

 

[Sparky-Watts]

Last summer I bought a pair of red Speedos. I look damn good in them, too!