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3/17/2008 

 

4248-301-900 - INST 

 

 

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10.  If not already installed, install drain plug and torque plug to 

15 ft-lbs

.   

11. 

Note:

 With the transmission drained, it is a good time to change the 

control main filter (canister style filter on driver’s side of transmission). 
See steps 11 through 18 for installation instructions. 

12.  Use a standard strap-type filter wrench to remove control main filter. 

Remove filter by rotating counterclockwise. 

13.  Remove magnet from filter attachment tube in the converter housing or 

from the top of the control main filter. 

 

14.  Clean any metal debris from the magnet. Presence of any metal pieces 

larger than dust may indicate that transmission replacement or overhaul 
is required. 

15.  Reinstall magnet on filter attachment tube in converter housing. 

16.  Lubricate gasket on the control main filter with clean transmission fluid. 

17.  Install, by hand, control main filter until gasket on the filter touches 

converter housing. 

18.  Turn main filter ¾ to 1 full turn after gasket touches. Turning past 1 full 

turn can damage filter and cause fluid leakage.  

19.  To fill transmission, add approximately 

10 quarts 

of new 

DEXRON III

 

automatic transmission fluid to transmission through fluid filler tube 
located under hood of truck.  

Filter Attachment Tube

Filter Magnet

Control Main Filter

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