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Transmission failure - M5OD - Only 4th gear

patternfall

New Member
Joined
June 20, 2010
Messages
7
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0
City, State
Seattle, WA
Year, Model & Trim Level
1990 XLT
1993 Explorer 4x4 XLT w/ M5OD manual transmission

Driving down the highway and suddenly 5th gear drops out like it's in neutral. Switch to 4th and it drives. Further testing shows Reverse, 1st, 2nd, 3rd, and 5th gears are all not engaging. The shifter moves, it feels like it "engages" with a little bit of expected resistance, but alas no power.

I ended up driving from Oregon to Seattle - 190 miles - in just 4th gear. Actually made it in the driveway, too.

So I've researched that 4th gear is direct drive 1:1, which I am guessing is the reason it kept working... but I know very little about transmissions, unfortunately. I've started looking around the area for a cheap replacement, but I wanted to make sure this is a major problem that can't easily be repaired.

Any thoughts?
 


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Wrench

Well-Known Member
Joined
December 30, 2005
Messages
256
Reaction score
1
City, State
Courtenay, BC
Year, Model & Trim Level
99 B4000 4.0L OHV
What's the tranny oil look like?
 




KPT

Explorer Addict
Joined
February 5, 2003
Messages
1,554
Reaction score
1
City, State
NC
Year, Model & Trim Level
'95 XL 4x4
Look through my rebuild thread (its stickied in this section). Fourth gear is not a gear. The input and output shafts get locked together. Something is up with the countershaft or gears that drive it/the output shaft from it.
 




patternfall

New Member
Joined
June 20, 2010
Messages
7
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0
City, State
Seattle, WA
Year, Model & Trim Level
1990 XLT
Well, update. Found a good condition replacement from a 1996 4WD ($200).

Tranny oil (atf) was burnt as hell, smelled terrible, and only about 2-3 cups came out.

Removed it, got the top cover off, and much to my surprise first gear was GONE all the way to the shaft. Heat melted the little plastic fluid trough. It was ugly. Took a few pictures.

I now know a lot more about transmisisons. No teacher like experience.
 




swetrid

Explorer Addict
Joined
September 30, 2010
Messages
1,888
Reaction score
3
City, State
Reading Pa
Year, Model & Trim Level
1999 Eddie Bauer
Low fluid level is the main killer of manual trans. We have had many towed in over the years for same problem, no fluid in trans.
 




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