So I. Finally think I had all the gremlins out of my jeep I get it running and now the jeep won't move in drive I can put it inreverse it works fine I put it in 3rd its fine put it in 1-2 its fine what could this be I will say that I had to get a new shifter cable to go from the shifter to tranny and I pulled one from a h.o motor and it was alot shorter than the original I don't know if that would be an issue or not the tranny is also one I got from a junk yard i'm just hoping tranny doesn't need rebuilt any input Would be great thank

 

Bump anyone?

 

first look under the pass side dash you will see a 10a fuse in the harness pull it this is for the tcm...drive the truck but u will have to shift it manually it will not have 2nd gear that is electronicaly controld if you can drive it the tranny is still good....next replace the tps that is the problem i had this happen to me but i lost all forward gears had to drive it home in rev ...the tranny shifts like new agan

 

ok i will look into the tps sensor correction after further investigation the jeep has park reverse neutral drive and third but in drive tranny will not shift out of first gear i checked inline fuse at tcm and it was a little melted but fuse wasnt blown and wires were not melted i did go ahead and replaced it but still no change....

 

TAKE THE FUSE OUT...and try to drive it manually

 

will do and will report back

 

If you pull the fuse on the TCM, you will need to start driving with the gear selector in 1-2, then shift up to 3 or D once you get up some speed. Kind of like a manual without the clutch.

Thre is a little inline resistor as well to check out as well as the fuse. It doesn't hurt to put some better grounds around that area. See Cruisers ground posts.

I installed a toggle switch so I can turn off the TCM when it acts up.

 

i will put all my money on the TPS.

been there, done that.

 

If it wont shift out of first gear when in drive, its a bad tps 99% of the time.

 

So basically the Jeep moves from a stop in every gear selection except D?

If so, I can't see that being a TPS issue.

 

according to his first post its that way, but in another post he said it just wont shift out of first when in D

 

correct first post is incorrect it has drive but will not shift out of first gear

 

Now we're getting somewhere.

Here's how to test and adjust the tPS. Be sure to do the test on the square 4 wire connector.
RENIX TPS ADJUSTMENT
Before attempting to adjust your TPS be sure the throttle body has been recently cleaned. It's especially important that the edges of the throttle butterfly are free of any carbon build-up.
IMPORTANT NOTE: With the Key OFF, and using the positive (red) lead of your ohmmeter, probe the B terminal of the flat 3 wire connector of the TPS. The letters are embossed on the connector itself. Touch the black lead of your meter to the negative battery post. Wiggle the wiring harness where it parallels the valve cover and also over near the MAP sensor on the firewall. If you see more than 1 ohm of resistance, or fluctuation in your ohms reading, some modifications to the sensor ground harness will be necessary. The harness repair must be performed before proceeding. I can provide an instruction sheet for that if needed.
MANUAL TRANSMISSION:
RENIX manual transmission equipped XJs have only a flat three-wire TPS mounted on the throttle body and it provides data input to the ECU. It has three wires in the connector and they're clearly embossed with the letters A, B, and C. Wire "A" is positive. Wire "B" is ground. Key ON, measure voltage from "A" positive to "B" ground by back-probing the connectors. Note the voltage reading--this is your REFERENCE voltage. Key ON, back-probe the connector at wires "B" and "C". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be seventeen percent of your REFERENCE voltage. For example: 4.82 volts X .17=.82 volts. Loosen both T-20 Torx screws attaching the TPS to the throttle body and rotate the TPS until you
have achieved your desired output voltage. Tighten the screws carefully while watching to see that your output voltage remains where it is supposed to be. If you can't achieve the correct output voltage, replace the TPS and start over.
Sometimes, after adjusting your TPS the way outlined above, you may experience a high idle upon starting. If that happens, shut the engine off and reconnect your probes to B and C. Start the engine and while watching your meter, turn the TPS clockwise until the idle drops to normal and then rotate it back counterclockwise to your desired output voltage.
AUTOMATIC TRANSMISSION: RENIX automatic transmission equipped XJs have a TPS with two connectors. There is a flat three-wire connector, same as the manual transmission vehicles have, and it is tested the same as the manual transmission equipped vehicles, as outlined above—FOR ALL ENGINE MANAGEMENT RELATED ISSUES.
However, the automatic TPS also has a square four-wire connector, clearly embossed with the letters A,B,C, and D. It only uses three wires and provides information to the Transmission Control Module. THIS SQUARE FOUR WIRE CONNECTOR IS USED FOR TRANSMISSION/SHIFTING RELATED ISSUES ONLY. Key ON, measure voltage between "A" positive and "D" ground. Note the voltage. This is your REFERENCE voltage. Back-probe the connector at wires "B" and "D". Measure the voltage. This is your OUTPUT voltage. Your OUTPUT voltage needs to be eighty-three percent of your REFERENCE voltage. For example 4.8 volts X .83=3.98 volts. Adjust the TPS until you have achieved this percentage. If you can't, replace the TPS and start over. So, if you have an automatic equipped XJ your TPS has two sides--one side feeds the ECU, and the other side feeds the TCU.
FOR AUTOMATIC TRANSMISSION RELATED ISSUES: Check the square four-wire connector side of the TPS.
If you have ENGINE ISSUES check the flat three-wire connector side of the TPS.
For those with a MANUAL TRANSMISSION--the TPS for the manual transmission XJs is stupid expensive. You can substitute the automatic transmission TPS which is reasonably priced.
Revised 09-22-2012

 

So let me ask you this I was checking a few things and the speedo cable is not hooked up could this cause it not to shift?

 

Uh, no.