My speedometer does not work on my 1993 Jeep Grand

probley the speed sensor on the rear of transfere case

Usually a bad crank sensor or a bad ecu computer.

The transfer case is bolted directly to the back of the transmission. Follow the drive shafts, they connect to the transfer case. It is never a bad idea to check fluid levels, however, unless you have a leak, you should not have to add fluid to the transfer case with any kind of regularity.

Whether you have a drive shaft on or not the roll back is the ebrake not properly working like it should it will need a adjustment,and as for the bouncing speedometer you will need to inspect the cable as they can wear out.

I just fixed the same problem with my own GC Limited - and it WAS a dealer part (in my case). In order to get the correct switch you need to determine what type of transfer case you have. You can do this by crawling under the vehicle near the middle and look for a small round metal tag mounted on the back side of the transfer case. Once you have that number (new process type 231, 242, 249...) you can order the correct part.

If your local jeep dealer is of a friendly sort you may even be able to avoid all the crawling around and just tell the parts manager your VIN# and he will be able to tell you what type transfer case you have - provided that it is the factory installed original.

According to the mechanic who works on my 93 Jeep it's one of three things:
1) Corrosion on the connector to the switch (which is located on top of the transfer case).
2) A bad switch. Part cost about $22.00, or
3) A bad console display. he says they have had a fair number of console display units fail. That one runs about $240.
My Jeep display it only once in a while. I have checked the connections and they are fine so the switch replacement is next. If that doesn't fix it I will opt to ignore the error.

Hope this helped (remember comment and rated this).

On the back of the case you should see a round tag. The numbers you are looking for are right on there.

you either have a bad u joint or the transfer case chain is jumping off the gear

Visit someone dealer, and review this index:
- ZJ-Secc-0-Lubrication-and-Maintenance (Section 0, Page 0-18 and next)
- Jeep-1991-1993-MOPAR-Parts-Catalog
- Crown Catalog/ Transfer_case

Good luck!!!

No, it is for the speedometer only. The cable that runs to the throttle from the transmission needs adjusted.

Sounds like a transfer case problem. But I can't verify that from here. Coupler is inside the unit on the output shaft and needs teardown to get to it.