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4L60E transmission rebuild manuals (700R4)
Information about rebuild 4L60E (700R4) transmission
In the early 90s there was a problem of development of a heavy-duty automatic gearbox, which could be used in the Hummer cars equipped with the powerful petrol and diesel engines. A principally new four-speed automatic transmission 4L60E was developed, which got a reinforced hydro block and a special pump’s design that allowed in a high-quality way to ensure engine lubrication. To ensure high-quality transmission’s lubrication solenoids channels were significantly increased. This required the use of updated and enlarged in size solenoids. It should be noted that certain functions of modification of transmission are controlled by electronics. Altogether thes automatic gearbox makes a positive impression. It differs by reliability and reparability. It means that you can repair the automatic gearbox GM 700R4.

Transmission 4L60E problems
At the same time, it must be said that due to the increased sizes the repair of automatic transmission 4L60E of this modification is more difficult. Dismantling transmission is time-consuming task, which is made only under the force of the special equipment. The self-sufficient repair of the automatic transmission can’t be carried out.

4L60E scheme diagram


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