2004-2008 Chrysler Crossfire Drive Shaft: Decoding Vibrations and Part Variants
This guide covers the common failure points, symptoms, and critical differences between the Automatic, Manual, and SRT-6 rear drive shafts.
- There are three non-interchangeable drive shafts for the Crossfire: one for automatic, one for manual, and one for the SRT-6. Verifying the correct length and part number is essential before buying.
- The most common failure point is the rubber housing of the center support bearing, which dry-rots and sags, causing vibrations.
- Original OEM drive shafts have non-serviceable (staked-in) U-joints. Most aftermarket replacements feature serviceable U-joints, making future repairs easier and cheaper.
- When buying a used shaft, the most critical inspection point is the condition of the center support bearing's rubber carrier.
Critical Compatibility Warning: Three Different Drive Shafts
Before purchasing a replacement drive shaft, you must correctly identify your vehicle's specific model. The 2004-2008 Chrysler Crossfire used three different rear drive shafts that are NOT interchangeable. Installing the wrong shaft will lead to improper fitment, severe vibrations, and potential damage to the transmission or differential.
Warning: The most significant difference is the length. Using a shaft that is too long or too short can prevent installation or cause catastrophic failure while driving. Always measure your original shaft or verify the part number before ordering.
| Vehicle Model | Transmission | Approx. Length | Key Part Numbers |
|---|---|---|---|
| Base / Limited | Automatic | 47.375 inches (1203 mm) | Chrysler: 5102636AA; Mercedes: 1704102706; Dorman: 936-496 |
| Base / Limited | 6-Speed Manual | 49.625 inches (1260 mm) | Chrysler: 5099384AA; Dorman: 936-497 |
| SRT-6 | Automatic (Supercharged) | Unique Length (Not interchangeable with other models) | Chrysler: 05135420AA, 5135420AA; Mercedes: A1704102806 |
Symptoms of a Failing Drive Shaft
Drive shaft failures on the Crossfire typically relate to the wear of its supporting components. The symptoms can range from subtle noises to severe, speed-dependent vibrations.
- Vibrations From Underneath: This is the most common symptom. The vibration may only appear at certain speeds (e.g., above 30 mph) or during acceleration. This is often caused by a sagging center support bearing or a worn U-joint.
- Shuddering on Acceleration: A noticeable shudder or jolt when accelerating from a stop can indicate a worn center support bearing or failing flex discs.
- Abnormal Noises: A variety of sounds can point to a bad drive shaft. These include squealing or howling that changes with speed (center bearing), grinding or knocking sounds (center bearing or U-joint), or a clunking noise when shifting from Park to Drive or accelerating (worn U-joint).
- Burning Rubber Smell: In some cases, a failing center support bearing can cause enough friction and heat to melt the surrounding rubber components, producing a distinct burning smell.
Known Issues and Common Failure Points
The Crossfire drive shaft assembly is generally robust, but its supporting parts are known to wear out.
Center Support Bearing Failure
This is the most common issue. The center support bearing is held in a rubber carrier that is bolted to the car's chassis. Over time, this rubber dry-rots, cracks, and sags. This allows the drive shaft to move off-center, causing vibrations, stress on the U-joints, and the other symptoms listed above. On the Crossfire, Chrysler and Mercedes-Benz dealers traditionally did not sell the bearing separately, forcing owners to buy a complete and expensive drive shaft assembly.
Worn Flex Discs (Giubos)
These rubber couplings are located at the front and rear of the drive shaft. They absorb shock and allow for slight misalignment. With age, the rubber can crack and deteriorate, leading to driveline slack and clunking noises. When replacing the drive shaft, it is highly recommended to install new flex discs at the same time.
Non-Serviceable U-Joints
The universal joints (U-joints) on the original factory drive shafts are staked-in, meaning they are not designed to be easily replaced. When a U-joint wears out, the official repair is to replace the entire drive shaft. Many new aftermarket drive shafts are built with serviceable U-joints that use snap rings, making future repairs much cheaper and easier.
Buying a Used Drive Shaft, Rear
A used OEM drive shaft can be an excellent, cost-effective solution, especially since the shaft tubes themselves rarely fail. However, a thorough inspection is critical to ensure you're getting a good part.
Pro Tip: A low-mileage used OEM shaft is often a better choice than a cheap, new aftermarket part. OEM shafts are balanced to high standards from the factory, while the quality and balance of some low-cost aftermarket units can be inconsistent.
- Verify the Variant: First and foremost, confirm you are buying the correct shaft for your car (Automatic, Manual, or SRT-6). Use the table above to check the length and part numbers.
- Inspect the Center Support Bearing: This is the most important checkpoint. Examine the rubber carrier surrounding the bearing. Look for any cracks, tearing, or sagging. The rubber should be firm, not brittle or mushy. Grab the shaft near the bearing and try to move it up and down; there should be very little play.
- Check the U-Joints: Hold one half of the shaft while trying to twist the other. There should be no noticeable play or clunking in the central U-joint. The joint should pivot smoothly in all directions without binding or feeling gritty.
- Examine the Shaft Tubes: Inspect the entire length of both shaft sections for dents, deep gouges, or any signs of bending. A dented shaft will be out of balance and will vibrate. Ensure the factory balance weights are still present and securely welded to the tube.
- Check the Splines: If the shaft is separated, inspect the splines on the male and female ends. They should be clean and well-defined, with no signs of twisting or stripping.
Cost Comparison
Prices can vary, but this provides a general estimate for the different repair options.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM | $1400+ | Often discontinued or hard to find. Typically sourced from a Chrysler/Mopar dealer. |
| New Aftermarket | $600 - $1,300 | Prices vary by brand. Dorman and other brands are widely available. |
| Used OEM | $150 - $350 | A common option from auto recyclers. Price depends on condition and mileage. |
| Shop Labor (Replacement) | $200 - $450 | Typically 2-3 hours of labor. |
Replacement Overview
Replacing the drive shaft is a moderately difficult job that can be done by a skilled DIY mechanic.
- Difficulty: 3/5
- Estimated Time: 2-3 hours
- Tools Needed: Jack stands, metric socket set, E-Torx sockets, torque wrench, pry bar.
The general process involves safely lifting and supporting the vehicle, removing the center exhaust section and heat shields for access, and then unbolting the flex discs at the transmission and differential. The center support bearing is then unbolted from the chassis, and the entire assembly can be lowered and removed. It is critical to mark the alignment of the two shaft halves before separating them (if necessary) and to torque all bolts to factory specifications during reinstallation.
Recalls and Technical Service Bulletins (TSBs)
As of this writing, there are no specific NHTSA recalls or widespread TSBs issued for the rear drive shaft on the 2004-2008 Chrysler Crossfire.
Frequently Asked Questions (FAQ)
Can I just replace the center support bearing?
Yes. While the dealership solution was to replace the whole shaft, the aftermarket offers solutions. You can buy just the rubber carrier and press out the old one, or purchase an upgraded two-piece carrier that bolts around the existing bearing, which is an easier installation. However, this only solves the problem if the bearing itself and the U-joints are still in good condition.
Is the Crossfire drive shaft the same as a Mercedes-Benz SLK?
Yes, in some cases. The Crossfire is based on the Mercedes R170 platform. The drive shaft for the automatic transmission Crossfire is the same as the one used in the 2001-2004 Mercedes-Benz SLK320. The SRT-6 drive shaft is related to the one from the SLK32 AMG. Always verify part numbers for an exact match.
What are the alignment marks on the drive shaft?
The two halves of the drive shaft are balanced as a single unit. To ensure they are reassembled in the same orientation, the factory stamps alignment marks on the splined connection point. Typically, there is one mark on one half that must line up between two marks on the other half. Failing to align these marks will cause a severe vibration.
Do I need to get the new drive shaft balanced?
No. New aftermarket and remanufactured drive shafts are pre-balanced at the factory before being shipped. They are ready to install out of the box. If you are having individual components like U-joints replaced at a specialty shop, the shop should balance the complete assembly before returning it to you.
Technical Specifications
OEM Part Numbers: 05099384AA 5099384AA 05102636AA 5102636AA 05135420AA 5135420AA 1704102706 A1704102706 1704102806 A1704102806
Automatic (Non-SRT) Length: 47.375 inches. Manual (Non-SRT) Length: 49.625 inches. All are two-piece steel shafts with a center support bearing and non-serviceable U-joints on OEM units.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chrysler Crossfire:
- Critical Compatibility Warning: Three Different Drive Shafts
- Symptoms of a Failing Drive Shaft
- Known Issues and Common Failure Points
- Center Support Bearing Failure
- Worn Flex Discs (Giubos)
- Non-Serviceable U-Joints
- Buying a Used Drive Shaft, Rear
- Cost Comparison
- Replacement Overview
- Recalls and Technical Service Bulletins (TSBs)
- Frequently Asked Questions (FAQ)
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