Differential or transfer case failure on the 2001 Jeep Wrangler
Only 6 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When differential or transfer case failure gets reported
There are 9 reports of differential or transfer case failure on the 2001 Jeep Wrangler, 6 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 110,000 miles. It is the 7th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 130,428 miles | — | — |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $900–$4,200 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 16 model years of this car. It shows up earliest on the 2002, at a median of 100 miles, and latest on the 2001 at 130,000 miles.
By volume the 2019 carries the most reports, with 14; the 2001 has 9. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Frame is rusted through at all points where skidplate attaches to frame!! The underside of the frame is rusted through/gone at the area where skidplate bolts to. As a result the skidplate is hanging down and not properly supporting transmission and transfer case.. Because of this hanging it is causing misalignment of the drivetrain.. Damaging components of the drivetrain. I cannot imaging if this goes undetected and the frame cracks and/or breaks while the vehicle is in motion, at what is the middle of the frame. *js
This is been an ongoing problem since I purchased this vehicle the frame is pretty much completely rotted away basically since the day I bought it it is cost me almost $4000 to get the frame repair of repeatably. One such time my transmission and transfer case actually fell out because the skid plate rotted out for bolts on. This specific repair cost me almost $3000 to fix as I had to get another transfer case and a newport of rail made. I also have my rear upper control arm mounts rust off of the frame destroying my rear axle . That was another $2000 replacement. I have seen instances at the shop where ports of falling off of these vehicles due to the same issue. I respect the toyota recall the rusted frames and I think it's finally time to make chrysler do the same . They have known this is an issue since the 80s and continue to do this.
My 2001 jeep is in real good shape visibly and no rust anywhere I can tell on the body or outside of the frame. However, when pulling the crossmember off that holds the transmission/transfer case to the frame, I noticed a massive amount of rust in the frame. It looks as if the frame came out of a 1920 model car or worse under there. I may attempt to have that section fixed, but I have noticed the boxed frame on the jeep has no where for water to go once inside of it. My only option would be to make drainage holes for water and try to spray cosmoline or something inside the frame and just "hope" the rest of the frame is not rotting from the inside out. I would not even complain but a vehicle that is barely 15 years old already rusted out this bad on the frame must have been designed poorly or made with garbage steel and coated poorly. I am surprised people in the salty areas of the us have not had their crossmember simply fall off while driving. If you need a picture of the rust it is in my phone and can not access it from this pc.
Also reported on the 2001 Jeep Wrangler
Other body or interior problem
Other electrical problem
Other powertrain problem
Other suspension problem
Rust or structural corrosion
Other engine problem
How far this goes
This page is kept out of search results because 9 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 9 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does differential or transfer case failure happen on the 2001 Jeep Wrangler?
Across 6 owner reports that included an odometer reading, half were filed by 130,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is differential or transfer case failure on the 2001 Jeep Wrangler?
9 reports have been filed with NHTSA, about 0.1 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed