Transmission not working

If when in gear, the engine accelerates(revs) like it is in park or neutral, it sounds like a transmission concern. Have you checked the transmission fluid, running in park? Verify that the level is full, and also take a sniff. If it smells burnt, and is off color(brown), it could indicate an internal problem.

This guide can help

https://www.2carpros.com/articles/automatic-transmission-problems

Please run down this guide and report back.

Hi there,

Auto transmissions are very complex items, you really have to dismantle the box first before you can give a quote, you may be better off asking for a price on a change over transmission fitted, this he should be able to quote with out a problem.

Mark (mhpautos)

If the check engine light is comming on, have the codes read, sounds like a shift solinoid, tcc lock up.

Have the suv scanned anyway, check for any "freeze frame data" could be a bad tranny as well. There is a tech bulliten for low line pressure, could be your problem.
4r44e/4r55e/5r44e/5r55e - low line pressure at wot - dtc p0732, p0733, p1762
technical service bulletin
reference number(s): 03-22-10, Ã date of issue:Ã november 10, 2003
ford: 1995-2001 explorer; 1995-2002 ranger; 1996-97 aerostar; 2000-2002 explorer sport; 2001-2002 explorer sport trac mercury:1997-2001 mountaineer
superceded bulletin(s): 03-11-9, Ã date of issue:Ã june 9, 2003, 02-13-8, Ã date of issue:Ã july 8, 2002, 02-08-2, Ã date of issue:Ã april 29, 2002 related ref number(s): 02-13-8, 02-8-2, 03-11-9, 03-22-10
article beginning
description
note: this article supersedes tsb's 03-11-9, 02-13-8 and 02-08-2 to update the model coverage.
Transmission - 4r44e - 4r55e - 5r44e - 5r55e - low line pressure reading at wide open throttle (wot) - possible diagnostic trouble codes p0732, p0733, p1762 - vehicles built before 12/1/2001
issue
some vehicles built prior to 12/1/2001 may exhibit the following shift and engagement conditions:
à   no 2nd gear
à   no 3rd gear
à   no engine braking in manual 1st.
Out of specification pressures controlled by the transmission main control valve body separator plate may be the cause.
Action
verify the condition, the main control valve body separator plate may need to be updated to the latest level. Refer to the following service procedure for details.
Service procedure
caution:a new separator 7z490 must be used when installing the special service kit 7m203 or additional transmission damage may occur. Refer to the parts application chart in this article for correct separator plate part listing.4r44e/4r55e/5r44e/5r55e - low line pressure at wot - dtc p0732, p0733, .
Page 2 of 2
note: this article does not apply to any other conditions or components that may cause similar symptoms and is only written to cover these specific conditions.
Note: an in-line service filter is not required to be added or replaced for this tsb.
1. Verify that one or more of the following conditions exist.
à   low line pressure while in drive at wot
à   no 2nd and/or no 3rd gear
à   no engine braking in manual 1st
à   dtc p0732, p0733 or p1762 2. Install kit (3l5z-7m203-ja) to update the main control valve body assembly, refer to the installation procedures found in the kit. 3. Reinstall the main control by continuing to follow the installation steps listed in the workshop manual, in-vehicle service, main control valve body. 4. After completing the procedure, verify the condition has been corrected. 5. Clear all dtcs.
Parts information

Spark plugs for trans overheating?

There is a temp sensor in the trans that monitors temp of the fluid. If the cooler is clogged, it will cause this issue. The fact that it is slipping means there is damage to the clutches.

Roy

IF you feel the transfer case is the problem, check to make sure the 4wd actuator is working properly. Remove it and check for operation.