Tranny question for 88 RT4WD

chuckshinchuckshin Wagonist
in Engine & Drivetrain
Sorry I have searched the site for topics on transmissions and didn't see what I was looking for. Hope you guys can offer some asssitance and/or suggestions.

I am a new owner of a 88 RT4WD (since Sept. 2010) and not familiar at all what the gearing is but crusing on the highway at 70mph I'm already pushing 3400-3500RPMs. I'm almost at 4000RPMs at 80mph.

I have a couple of questions:
1. Is this normal on a RT4WD?
2. Is there a transmission I can do a straight swap without any modifications?

Any thoughts would be greatly apprecaited.

Thanks,
Chuck

Comments

  • n0rbi666n0rbi666 Band Wagon
    1) yup, yesterday on 5th gear and 4000RPM i've had~140km/h :)
    2) No, but I think you can try to swap 5th gear :)
  • bam-bambam-bam Council Member
    He's right^^

    1) yes
    2) no.
  • DRMORTYDRMORTY Council Member
    Or, Taller Tires = Re-Geared
  • SiWagonSiWagon Council Member
    NO! You can not swap in a 5th gear in the 4WD tranny.
    The 4WD is geared low for off roading.
  • The_HeadThe_Head familEE
    DRMORTY wrote:
    Or, Taller Tires = Re-Geared

    Don't go too tall or it will be a dog, well unless you have much more power than stock. I had 205/60 R15 tires on mine right before I sold it and it was not good. It also hurt fuel economy.
  • silentdork818silentdork818 Band Wagon
    The 5th gear on 85-87 4wd wagons may work. It is the only one I could find a while back that had similar dimensions to the 88-91 RT4WD gear (per service manual specs). Only problem is that it's only a .75 vs .787 or whatever they are, so it may not be worth all that work.
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