GEELY 1077588700 TRANSMISSION MOUNT
Product Specifications
| GEELY | 1077588700 |
The TRANSMISSION MOUNT is a rubber-bonded hydraulic or solid elastomeric mount that supports the transmission or gearbox against the vehicle's body crossmember or subframe, performing three simultaneous functions: carrying the static weight of the transmission assembly; limiting transmission movement under the dynamic torque reaction forces generated during acceleration, deceleration, and gear changes; and isolating the vehicle body from the high-frequency vibration and lower-frequency torque pulses transmitted through the drivetrain from the engine and road surfaces. The mount consists of an inner metal sleeve that bolts to the transmission casing bracket and an outer metal bracket that bolts to the body crossmember, bonded together by a precision-formulated natural rubber or hydrogenated nitrile rubber element whose compound stiffness and geometry are calibrated to provide exactly the right balance between load capacity — the mount must not allow the transmission to sag or rotate excessively under full acceleration torque — and compliance — the rubber must deflect sufficiently to absorb vibration frequencies from the drivetrain without transmitting them to the body structure. On hydraulic transmission mounts used in high-refinement applications, the rubber element encloses a fluid-filled chamber with internal orifices that provide additional damping of specific vibration frequencies through hydraulic resistance — these mounts provide superior vibration isolation at low engine loads where solid rubber mounts transmit more vibration.
This unit — GEELY 1077588700 — is manufactured to OEM-equivalent specifications: inner sleeve bore diameter and thread for transmission bracket attachment, outer bracket dimensions and mounting hole positions for crossmember attachment, rubber compound Shore hardness and dynamic stiffness in the primary load axis, maximum static load capacity, and hydraulic fluid fill where applicable are matched to the original part. Supplied as a complete assembly ready for installation. Available wholesale from 11.51 USD, MOQ 1 pcs, production lead time 75-105 days.
Transmission mounts fail through rubber element cracking and delamination from ozone, heat cycling, and oil contamination — oil dripping from an engine or transmission seal onto the mount rubber degrades the compound and accelerates hardening that eliminates the mount's compliance and vibration isolation function; through rubber tearing from abnormal shock loads when the vehicle's wheel drops into a pothole under full acceleration torque; and through the inner or outer metal sleeve separating from the rubber bond from fatigue. A completely failed mount that allows the transmission to move excessively causes misalignment of the propeller shaft or driveshaft joints, accelerating their wear, and allows the gear lever to move in the cabin — on manual gearboxes a loose mount can make gear selection difficult as the selector mechanism moves with the transmission rather than remaining fixed relative to the driver.
- Support the transmission on a transmission jack before removing the mount — the transmission mount carries the full weight of the gearbox tail section; removing the mount bolts without supporting the transmission allows the tail to drop suddenly, potentially bending the propeller shaft, over-extending the CV joints on front-wheel-drive transmissions, or damaging the wiring harness and fluid lines routed along the transmission tunnel; position the jack under the gearbox sump or tail housing before loosening any mount bolt.
- Inspect the crossmember and transmission bracket for corrosion and distortion before fitting the new mount — a crossmember with corroded or cracked mounting flange cannot provide the rigid reference surface the new mount requires; a transmission bracket that is bent or cracked from the old mount's collapse must be replaced before a new mount is installed; torquing a new mount to a distorted bracket produces incorrect mount geometry that alters the transmission's position and driveline angle from the first installation.
- Address any oil leaks from the gearbox or engine before installing the new mount — oil contamination is the primary cause of premature rubber mount failure; a new mount installed under an active oil leak will harden and crack within a fraction of its designed service life; identify and seal the leak source — typically the rear transmission seal, the gearbox oil pan gasket, or an engine rear main seal — before fitting the new mount to protect the replacement investment.
- Tighten the transmission bracket bolts and the crossmember bolts hand-tight before final torquing — the mount must be able to adopt its natural position without constraint from either the bracket or the crossmember during assembly; tightening one end fully before the other forces the rubber element into a pre-stressed position that cracks it prematurely; with all bolts hand-tight, lower the transmission jack to allow the mount to carry the transmission weight in its natural position, then apply final torque to all bolts.
- Torque all mount bolts to OEM specification with the transmission at ride height — typical torque values are 40–80 Nm for the crossmember bolts and 25–55 Nm for the transmission bracket bolts; the specific values vary significantly between applications; undertorquing allows the mount to move on its bolts under load; overtorquing crushes the rubber element between the bracket and the crossmember flange, destroying its compliance immediately.
- Install the new TRANSMISSION MOUNT (GEELY 1077588700), lower the vehicle, and perform a road test that includes firm acceleration from rest, a gear change under load, and a coast-down deceleration — confirm the clunking noise has been eliminated, the gear lever no longer moves excessively during drivetrain load changes, and no new vibration has been introduced from an incorrectly positioned mount before returning the vehicle to service.
| Part | Reason for Combined Replacement |
|---|---|
| Engine Mounts Left and right — OEM ref. varies by engine | Engine mounts and the transmission mount form a matched set that positions the complete powertrain in the engine bay at the designed geometry for correct driveshaft angles, exhaust clearances, and gear selector alignment. All mounts age from identical ozone, heat, and oil exposure — a transmission mount that has failed from rubber degradation confirms the engine mounts are at the same stage. Replacing all three powertrain mounts simultaneously ensures the complete mount system is renewed in a single operation with consistent rubber compliance across all load paths. |
| Gearbox Crossmember Body-mounted transmission support beam | The crossmember that the transmission mount bolts to is subject to the same underbody road salt environment as the mount itself and frequently develops through-corrosion at its body attachment points or at the mount's crossmember flange over high mileage. A crossmember with corroded or cracked flange cannot provide the rigid reference surface the new mount requires — a new mount on a corroded crossmember will shift its position as the crossmember flexes, producing the same clunk as the failed mount within a short period. Inspect and replace the crossmember if any structural corrosion is found. |
| Rear Transmission Oil Seal Output shaft or extension housing seal — application-specific | If the transmission mount has failed from oil contamination — indicated by oil-soaked rubber and an oily residue on the mount body — the source of the oil must be identified and sealed simultaneously. The most common source is the transmission rear output shaft seal or extension housing seal, which is accessible from below with the propeller shaft disconnected. Replacing the seal simultaneously with the mount eliminates the ongoing contamination source and protects the new mount's rubber from immediate re-contamination. |