Jeep Cherokee

 Service Manual

Transmission and transfer case » Automatic transmission-30RH » Service procedures
Aluminum thread repair

Damaged or worn threads in the aluminum transmission case and valve body can be repaired by the use of Heli-Coils, or equivalent. This repair consists of drilling out the worn-out damaged threads. Then tap the hole with a special Heli-Coil tap, or equivalent, and installing a Heli-Coil insert, or equivalent, into the hole. This brings the hole back to its original thread size.

Heli-Coil, or equivalent, tools and inserts are readily available from most automotive parts suppliers.

Fluid level check

Fluid and filter replacement

Transmission fill procedure

Converter drainback check valve service

Oil pump volume check

Flushing coolers and tubes

Aluminum thread repair