OEM-grade Transmission Mount 7L0399249B – Direct replacement without modification, perfectly compatible with various vehicle models, reducing engine noise and vibration. The Transmission Mount 7L0399249B delivers a quieter driving experience. Made from high-strength materials for durability, it offers factory-level performance at an affordable price.
7L6 399 225 F
7L6 399 225 Q
955 375 057 20
AUDI Q7
VW TOUAREG
The Transmission Mount 7L0399249B is optimized for high-performance vehicles, designed to withstand high stress during aggressive driving.
Effectively prevents transmission damage caused by excessive movement.
Wear-resistant and heat-tolerant, designed for demanding operating conditions.
The Transmission Mount 7L0399249B provides a quieter and smoother driving experience.
A reliable, long-lasting solution for performance vehicle owners.
Transmission Mount Replacement Guide
|
Item |
Budget Option (Amazon Basics) |
Pro Pick |
|
Floor jack + jack stands |
$45 |
$120 |
|
Torque wrench (20–150 ft-lb) |
$59 |
$120 |
|
13mm, 16mm, 18mm sockets |
$15 set |
$45 |
|
Pry bar / trim tool |
$8 |
$20 |
|
Wood block (2x4 scrap) |
Free |
— |
|
Thread locker (blue) |
$5 |
Loctite 243 |
|
Shop rags + brake cleaner |
$10 |
— |
1. Safety & Prep (5 min)
1. Park on flat concrete.
2. Chock rear wheels, engage parking brake.
3. Disconnect negative battery terminal (prevents airbag codes on VW/Audi).
4. Pro tip: Spray all bolts with PB Blaster 10 min prior.
2. Lift & Support (10 min)
1. Jack under front subframe center (use wood block to spread load).
2. Place jack stands under pinch welds.
3. Lower jack slightly so weight rests on stands.
4. Pitfall: Never work under car supported only by jack.
3. Access the Mount (10 min)
1. Remove underbody splash shield (8–12 plastic clips + 10mm bolts).
2. Locate mount: passenger side, between transmission & subframe.
3. Visual ID: Aluminum bracket with black rubber puck.
4. Support the Transmission (CRUCIAL – 5 min)
1. Slide second jack + wood block under transmission oil pan.
2. Raise just enough to take weight (1–2 cm).
3. Pitfall: Too high = cracked pan. Too low = mount won’t drop.
5. Remove Old Mount (15 min)
1. Top bolts (3x 16mm): Engine-side bracket → loosen.
2. Bottom nuts (2x 18mm): Subframe side → remove.
3. Pry bar gently: Wiggle mount out (it’s stuck from heat/age).
4. Keep hardware! Label in zip bag.
6. Inspect & Clean (5 min)
1. Check subframe & trans bracket for cracks/bent metal.
2. Clean mating surfaces with brake cleaner + wire brush.
3. Pro move: Apply thin layer of anti-seize to new bolts.
7. Install New Transmission Mount 7L0399249B (15 min)
1. Align new mount (arrow faces forward on VW/Audi).
2. Hand-thread all bolts/nuts.
3. Torque sequence:
1. Bottom nuts: 55 Nm + 90° (angle torque)
2. Top bolts: 40 Nm + 90°
4. Use blue Loctite on bottom studs.
8. Lower & Reassemble (10 min)
1. Slowly lower trans jack.
2. Remove jack stands → lower car.
3. Reinstall splash shield.
4. Reconnect battery.
9. Test Drive & Final Check (10 min)
1. Start engine → shift D → power brake test (brake + light throttle).
2. Engine should lift <1 inch.
3. Listen for clunks or vibes.
4. Recheck torque after 100 miles.
One-Sentence Summary
Support trans → unbolt old → clean → torque new 8W0399156BH to 55+90° → power brake test → done in under 90 min.
Inspect the mount every couple of months for cracks, slack, or loose parts—these are dead giveaways it's failing. Proven quick check (every mechanic swears by it): have a buddy in the driver's seat, drop it in Drive, brake locked, then slowly feed throttle to torque the engine. Open the hood and look—if the drivetrain shifts more than a slight tilt, the mount is toast. Keep up with fluid replacements. Stick religiously to the manufacturer's schedule; degraded, scorched fluid destroys rubber and speeds breakdown. Common question: “Must I replace the filter with every fluid change?” Absolutely—without fail. A blocked filter ramps up system pressure and pounds the mount from afar. Operate the vehicle as if longevity matters. Skip aggressive launches, abrupt halts, or nonstop towing. Gentle throttle and brake use is the best free protection available. Overheard at the service desk recently: “Brought it in expecting warranty on the mount—they blamed my heavy foot and denied coverage.” Core takeaway from two decades wrenching: Routine checks + timely fluid swaps + light pedal = far fewer replacements, big money saved.
Typical Transmission Mount Issues and Fixes: Quick Guide While on the road, certain glitches can mess with your ride's handling, and a beat-up or broken transmission mount is often the culprit behind many of them. This component is key for holding the transmission steady, soaking up shakes, and keeping things quiet. As it starts to give out, a bunch of warning signs pop up. Here's a rundown of the usual suspects with failing mounts, plus straightforward ways to sort them out.
Banging Sounds A dead giveaway of a faulty transmission mount is that banging noise, mainly during gear changes. Loads of drivers mention hearing it when switching from reverse to drive. It can also show up at slow speeds while shifting.
Solution: If banging is your problem, the mount has probably lost its grip on the transmission, letting it jiggle around on shifts. Swap in a solid replacement Transmission Mount 7L0399249B to kill the racket.
Powertrain Shakes Failing mounts often cause powertrain shakes, especially with the car idling in gear. You might feel the vehicle rumbling or quaking at low revs. Plenty of folks describe these shakes hitting hard in gear at idle when the mount is worn out.
Solution: Shakes mean the mount isn't damping vibes properly anymore, leaving the powertrain unsteady. Fit a tougher, upgraded Transmission Mount 7L0399249B to cut the tremors and bring back that smooth feel.
Jerky Gear Changes A bad mount can make gear changes feel jerky too. It's often worse at low speeds, like going from first to second or second to third. Drivers call the shifts "bumpy," with that hesitant or abrupt snap between gears.
Solution: Worn mounts let the transmission shift a bit mid-change, ruining smoothness. Install the Transmission Mount 7L0399249B to sharpen up shifts and ditch the jerkiness.
Engine Hesitation Engine hesitation ties right back to a tired transmission mount, usually when you back off the throttle at slow speeds. With the mount shot, the transmission drifts out of position, making the motor feel lazy or boggy on lift-off.
Solution: Sort this by replacing the bad mount. A fresh Transmission Mount 7L0399249B locks the transmission down, stops the hesitation, and perks up response at low speeds.
Powertrain Play Extra powertrain play can leave the car feeling sloppy and harder to drive cleanly. Owners complain about slack and clearance woes from the factory mount's flex, leading to "clanging" and tough smooth cruising due to all that wiggle.
Solution: When the OEM mount flexes too much and creates play, step up to a stiffer Transmission Mount 7L0399249B. It'll minimize movement, boost throttle snap, and make the whole drive feel tighter.
Wrap-Up: A busted transmission mount sparks all sorts of headaches like banging, shakes, jerky shifts, hesitation, and play. Spot any of these? Tackle it fast with a new mount. Go for a reliable Transmission Mount 7L0399249B to get performance back on track and enjoy a quieter, comfier ride.
Our Transmission Mount 7L0399249B comes with at least a one-year warranty. If any quality issues occur within the warranty period, we will provide free replacement or repair services. Our after-sales team is always ready to offer technical support to ensure product issues are resolved promptly.
Whether it's installation advice or product quality concerns, we are committed to providing timely assistance to our customers, ensuring the parts function properly and helping reduce maintenance costs for our clients.
