722.5 Transmission parts, repair guidelines, problems, manuals
Transmission general data
The 5-speed automatic transmission 722.5 had been used on rear- and four-wheel drive vehicles (Gelendwagen) from 1990 to 1997. The 722.5 design is based on successful 4-speed solution 722.3. The construction of the 3-rd series is complemented with advanced electronic control and the clutch package Overdrive. Almost all componentsin the 722.5 unit are interchangeable with 722.3. All typical problems are also identical.
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 5 | AT | RWD/AWD | 580 | 8,5 | 4 | 236.14 |
Technical issues and repair guidelines
The repair kit of gaskets and seals is ordered for reassembly of 722.5. In addition to typical overhaul procedures for this transmissions (replacement of gaskets and seals), repair specialists also replace the oil filter. The overhaul certainly includes repair of the torque converter caused by wear-out of friction linings of actively operating lock-up clutch (leaking pump seal is the sign of wear-out). In many cases, the repair consists of replacement of current pump seal and the pump bushing.
Transmission specialists also frequently have to replace all friction components. The package Reverse (piston) is replaced quite often because of damaged springs (because of old age) which are harmful for the whole unit.
The electrical part in the 722.5 unit (as well as hard parts) is quite reliable and its service life is compatible to the car's lifespan. Automatic transmission of 5-th series endures harsh operation conditions without any serious problems in contrast to following generations of 5- and 7-speed automatic transmissions 722.6 and 722.9.
Which cars run with this gearbox?
| Brand | Model | Year | Type | Engine |
|---|---|---|---|---|
| Mercedes-Benz | 300SL | 90-93 | 5 SP RWD | L6 3.0L |
| Mercedes-Benz | S CLASS | 94-95 | 5 SP RWD | L6 3.2L |
Instruction manuals and useful links
| Link type | Source | Description |
|---|---|---|
| web | www.at-manuals.com | Scheme |