Jeep Wrangler Forum - Conversation Between R-Sticker and Rubicon2
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Conversation Between R-Sticker and Rubicon2
Showing Profile Comments 1 to 4 of 4
  1. R-Sticker
    This looks interesting. If it works as advertised, the TruSpeed calibrator will not only adjust the speedometer, but will correct the transmission's shift points. Kinda sounds too good to be true. I'll investigate and let you know. Thanks...
  2. Rubicon2
    10-01-2012 05:57 PM
    Rubicon2
    Just be sure to check with Quadratec or someone else to make sure the TruSpeed calibrater will work with a Rubicon before you buy it, but I'm pretty sure it will.
  3. Rubicon2
    10-01-2012 05:53 PM
    Rubicon2
    Jeff-
    I can only post a short (1000) word message. I agree with you. The speedo does play a role in shift points for the trans. If you have a Rubicon, Superlift can help you out with their TruSpeed calibrater.
    Superlift Suspension 33002 - Superlift TruSpeed Speedometer Recalibration for 92-06 Jeep® Wrangler YJ & TJ with Over Size Tires - Quadratec It can be set for two different tire sizes and can be re-adjusted for others. It's a little pricey but it should help. Search the forum to see if anyone else has used it and to see if it works. Also do a Google search for Wrangler Speedo Adjustment.

    Otherwise if you have the NP231 transfer case it uses a gear instead of an electronic sensor and you can simply swap the gear Search Results - Quadratec

    If you have any other questions don't hesistate to ask! I hope this helps you out!

    -Steve
  4. R-Sticker
    Hey Rubicon2 - I saw your comments on speedo gears and transmissions and have a question that you may know about... I just put on 33s (285/75r16) and did 4.88s. I have an '05 with the 42RLE, which I know uses electronics for shifting. I've heard that the speedo gear should not have an effect on shift points, but I've also heard of 42RLEs running better after the right speedo-gear is installed.

    My engine is like a 94 yr. old grandmother with emphysema. I think the shift points somehow are effected by the R&P-gear/tire/speedo-gear combo; I think its shifting into OD prematurely. At 50 MPH, my RPMs drop to around 1200, and requires a full stomp on the gas pedal to get a downshift.

    What do you think? Does the speedo-gear play into this engine lag?

    Thanks,
    Jeff

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