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2006 Toyota Tundra powertrain problems
severe 20 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
20
Recalls
0
Avg fix
$2,500
4crashes
4injuries
When does it fail?
Of the 20 powertrain complaints filed for the 2006 Toyota Tundra, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA powertrain complaint has been filed on this vehicle in over 8 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: 2006 Tundras have chronic transmission control issues—cruise malfunction with dangerous RPM surge, transmission mount looseness, and unexplained multiple transmission failures—plus serious rear-end corrosion and drivetrain failures including driveshaft yoke and gear breakage. Avoid this model year unless you can get a thorough independent inspection of the transmission, rear differential, driveshaft, and frame.
These 2006 Tundra owners describe a mix of transmission, drivetrain, and corrosion issues. Cruise control malfunctions emerge most prominently: the system unexpectedly causes engine RPM to spike to 5000-plus without the transmission downshifting to match, leaving the truck in a neutral-like state. In one case, this happened mid-incline; in another, the truck lunged forward at a stop despite the driver pressing the brake. One owner had three transmissions replaced by 53,000 miles and was never given a diagnosis—the dealer said the manufacturer told them not to look at it.
Transmission bolts came loose from the factory on at least one truck, creating metal knocking that the owner fixed himself for $3.40 in parts. The overdrive button malfunctions on another, turning on the O/D light and causing unexpected gear holding and surges that require pressing the button repeatedly to clear.
Rear differentials leak from corrosion, gears break at low mileage (and break again shortly after "repair"), and yoke assemblies snap off driveshafts. One shop says driveshaft yoke failure is common across many Tundras. Frames and rear axles corrode heavily—some owners got frame recall coverage, others on the same model year did not. One truck's frame had holes above the wheels at 150,000 miles; another developed persistent vibration after frame replacement and no dealer could fix it.
The 4WD system was installed incorrectly at the factory and failed two days after purchase. Floor-mat anchor design is missing, creating potential accelerator-pedal entrapment.
Same Toyota Tundra powertrain reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Cruise control surge/runaway throttle behavior
When cruise control is activated or resumed, engine RPM spikes sharply (to 5000-5200 RPM) without corresponding transmission downshift, creating a neutral-like condition where the truck surges forward despite brakes being applied. Multiple owners report this happens unpredictably during acceleration, inclines, or gear shifts.
When: First incidents reported early in vehicle ownership; ongoing intermittent failures across various mileages
Symptoms owners cite: Engine RPM spikes to 5000-5200 RPM when resuming cruise control; Transmission fails to downshift to match engine speed; Vehicle lurches forward with high RPM despite brakes applied; No check engine light illuminated despite condition; Condition may be intermittent; works normally on retry
Repairs/costs cited: Dealers report being baffled by the condition; one case states manufacturer advised dealer not to diagnose the vehicle. No repairs documented in narratives.
Transmission mount bolt looseness/failure
Three of four 12mm hex bolts securing the automatic transmission mount/crossmember were missing or loose from the factory, allowing the transmission to shift excessively during acceleration and braking. Plastic retainer also detached.
When: Early in vehicle life, discovered at 10,000 miles with light knocking becoming progressively worse
Symptoms owners cite: Metal knocking sound under center console during acceleration and braking; Sound becomes progressively more noticeable after initial light noise; Rear transmission mount visibly loose, moveable by hand
Repairs/costs cited: Owner found and hand-tightened loose bolts; purchased 2 replacement hex bolts for $3.40 and realigned mount. Knocking stopped completely after repair.
Overdrive (O/D) button malfunction causing erratic shifting
The O/D button malfunctions, causing the overdrive light to illuminate and transmission to hold incorrect gear, producing RPM surge and vehicle surge. Owner must wiggle shifter or press O/D button repeatedly to restore normal operation. Problem recurs daily.
When: Ongoing throughout vehicle operation, happens at any given time
Symptoms owners cite: O/D light illuminates unexpectedly while driving; Engine RPM increases abnormally at highway speeds (65 MPH); Vehicle surges or pulls back and forth; Shifter wiggle or O/D button press temporarily corrects condition; Condition repeats daily at unpredictable intervals
Repairs/costs cited: Owner reports dealer wanted to charge for inspection and repairs; no repairs documented.
Multiple transmission replacements due to shifting and engagement failures
Transmission has required three replacements before 53,000 miles. Failures include inability to shift correctly, abnormal RPM increase during light pedal application, extreme high idle on startup affecting shift quality, and rear-end collision from unintended reverse engagement.
When: First failure at 20,000 miles; subsequent replacements by 53,000 miles
Symptoms owners cite: Abnormal increase in engine RPM causing incorrect shifting; Tachometer increases to 2 and will not decline when brakes applied; Vehicle takes off at high speed from light accelerator tap; Engine races extremely high at startup; High idle affects shift quality into gear
Repairs/costs cited: Three transmissions replaced; no diagnosis or repair attempted by dealer per manufacturer instruction
Recalls/TSBs owners mention: Dealer advised by manufacturer not to diagnose the vehicle
Rear differential fluid deterioration and noise
Rear differential fluid becomes discolored prematurely, leading to vibration and chatter on initial morning drives and during turns. Multiple fluid changes (by dealership and independent shop) and additive treatments have not resolved the condition.
When: Discovered during routine 7/12/11 oil change at dealership; vibration persisted for 2+ years afterward
Symptoms owners cite: Discoloration in rear differential fluid; Rear end vibration and chatter on first morning drive; Vibration and chatter increases during turns; Condition returns repeatedly after each fluid/additive service
Repairs/costs cited: Dealership replaced fluid and added additive; Midas later replaced fluid again. No permanent resolution.
Rear differential housing rust-out and leakage
Rear differential housing corrodes and rusts out, causing oil leakage around the differential pumpkin. Complete housing replacement required. Owners report this is endemic to these trucks despite frame recall for same rust issue.
When: Discovered after approximately 200 miles of normal driving; occurs on vehicles with high mileage (135,000+ miles) and those with recent frame replacement
Symptoms owners cite: Large grease spot visible in driveway/under truck; Oil leaking around differential pumpkin area; Entire rear differential housing rusted out internally
Repairs/costs cited: One owner reports frame was previously replaced due to rust recall; complete rear end housing replacement required due to rust damage. No good used housings available; new housing required.
Driveshaft yoke assembly failure
The yoke assembly on the rear driveshaft breaks, causing the rear portion of the shaft to fall off during vehicle operation. No warning signs or noises precede failure. Shop reports this is a common problem on many Tundras across model years.
When: At 135,000 miles without warning
Symptoms owners cite: Rear driveshaft yoke assembly breaks; Rear portion of driveshaft falls to ground while making turn; No warning lights or unusual noise prior to failure
Repairs/costs cited: Vehicle had to be towed for repair; repair facility confirms this is a common issue seen on many Toyota Tundras
Rear differential gear failure
Gears in the rear differential break, requiring full replacement. One owner experienced this twice: first at 55,000 miles (repaired under warranty), then again at 71,000 miles (only 16,000 miles on replacement gears). Raises questions about repair quality or inherent differential weakness.
When: First failure at 55,000 miles; second failure at 71,000 miles (8 years from purchase date)
Symptoms owners cite: Gears in rear differential break
Repairs/costs cited: First repair covered under warranty near expiration; second failure suggests either improper first repair or defective differential design
Driveshaft failure causing vibration
Driveshaft fails, producing pronounced vibration while driving. Failure diagnosed at dealer but not repaired. Occurs at moderate to high mileage.
When: At 79,000 miles
Symptoms owners cite: Vehicle vibration while driving between 30 and 60 MPH; Driveshaft failure confirmed by dealer diagnosis
Repairs/costs cited: Diagnosed by authorized dealer as failed driveshaft; vehicle not repaired per narrative
4-wheel drive engagement system defect from factory
The 4WD engaging unit was installed improperly at the factory, causing it to fail immediately and cascade failure to the electronic control unit. Neither system was tested before vehicle left factory or dealer.
When: Two days after purchase; discovered when attempting initial 4WD use
Symptoms owners cite: 4-wheel drive does not engage when activated
Repairs/costs cited: Both 4WD engaging unit and electronic control unit were replaced after 6 days in service department
Transmission shift problems and neutral kickout while driving
Transmission kicks out of gear unpredictably while driving and shifts very hard into second gear during acceleration, then randomly drops into neutral and coasts.
When: Timing not specified in narrative
Symptoms owners cite: Vehicle kicks out of gear while driving; Hard shift into second gear during takeoff; Random kickout into neutral during highway cruising; Vehicle coasts after kickout
Post-frame replacement vibration that will not resolve
After frame replacement due to rust recall, vehicle developed persistent vibration between 30 and 70 MPH that worsens when unloaded. Despite six dealer visits, vibration remains undiagnosed and unresolved. Toyota customer service could not help; owner escalated to state attorney general.
When: Following frame replacement for recall work
Symptoms owners cite: Vibration present between 30 and 70 MPH; Vibration becomes extreme when vehicle is not under load (during deceleration); Condition persistent despite multiple dealer attempts
Repairs/costs cited: Six dealer visits; no resolution achieved
Recalls/TSBs owners mention: Toyota customer experience department recommended owner pursue alternative recourse
Front differential noise and subsequent failure requiring rebuild/replacement
Growling and whirring sound with vibration emerges from front driver's side of vehicle at approximately 35 MPH. Initial dealer inspection found nothing; subsequent visit diagnosed bad front differential requiring rebuilding or replacement.
When: Timing not specified; occurs at 35 MPH speed range
Symptoms owners cite: Repetitive growling/whirring sound; Vibration at front driver's side; Noise and vibration at approximately 35 MPH
Repairs/costs cited: Initial dealer visit found no problems; second visit diagnosed need for rebuild or replacement. No completion status noted in narrative.
Severe frame and axle corrosion making vehicle unsafe
Frame developed severe corrosion with holes forming above front wheels and rear end heavily corroded within vehicle's service life. Toyota refused warranty or recall coverage despite 2006 Tundras and Tacomas being excluded from frame corrosion recalls that older and newer model years received. Earlier recall spray had limited availability and was not fulfilled when owner brought truck to dealer.
When: At 150,000 miles when broken brake line led to frame inspection
Symptoms owners cite: Severe frame corrosion with holes above front wheels; Rear end severely corroded; Vehicle deemed unsafe to drive by independent mechanic
Repairs/costs cited: Dealer advised owner to fix frame holes at owner's expense. Earlier recall spray had limited availability from Toyota and could not be fulfilled by dealer when requested.
Recalls/TSBs owners mention: No warranty or recall coverage despite older and newer Tundra/Tacoma model years being warrantied for same issue
Rear differential cover plate leakage due to corrosion
Rear differential cover plate is not bolted but rather fixed in place, and excessive corrosion of the entire rear axle assembly causes leakage of gear oil. Complete rear axle replacement is the only solution. Owner notes this is a safety issue if cover plate fails while driving at highway speeds.
When: Timing not specified in narrative
Symptoms owners cite: Gear oil leaking from rear differential cover plate; Excessive corrosion of entire rear axle assembly
Repairs/costs cited: Only solution is complete rear axle assembly replacement
Recalls/TSBs owners mention: Toyota stated they will not address problem without NHTSA recall initiation, despite existing recall for same issue on Tacomas
Unintended acceleration causing collision
While stopped in 4WD with brakes applied behind another vehicle, the truck lunged forward at very high RPM, colliding with the stationary vehicle ahead. Owner attributes this to transmission/engine malfunction. Owner also reports earlier cruise control surging issue on same truck.
When: During stationary stop after 4-wheeling activity
Symptoms owners cite: Vehicle lunges forward at high RPM despite brakes being applied; Unintended acceleration into vehicle ahead; Owner reports prior cruise control surging issues with same truck
Repairs/costs cited: Owner put transmission into Park and shut engine off to stop vehicle; significant front end damage resulted
Synthesized from 20 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
Vehicle kicks out of gear while driving would shift real hard into second gear taking off then when up to speed would kick out of gear as into neutral and coast randomly. *tr
This filing is in reference to my 2006 Toyota tundra sr5 v8 4.7 ltr 10,000 miles. For the past few weeks of driving the above referenced vehicle I started to notice a knocking metal sound under the center console when accelerating and braking... I took no immediate action as I found it to be a very light sound. After a few more days of driving the knock became more noticeable I was more alarmed,…
Had powertrain trouble with your 2006 Toyota Tundra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2006 Toyota Tundra?
It's a meaningful issue. 20 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 17 complaints that reported odometer mileage, most powertrain failures cluster between 41,000 and 102,000 miles, with the median around 67,293. A quarter of owners report trouble before 41,000; a quarter make it past 102,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2006/Toyota/Tundra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.