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david, Auto Service Technician
Category: Ford
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Experience:  Certified Master Technician,Certified in diesel & gasoline engines
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1988 Ford F-250 7.3 Diesel 5 speed manual ...

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1988 Ford F-250   7.3 Diesel 5 speed manual transmission-----What is the recommended fluid to put in it ????   Thanks for your help.

thank you for your question hope this helps.

All 5-speed transmissions tack

Manual transmission filler location

  1. Park the truck on a level surface, turn off the engine, apply the parking brake and block the wheels.

  2. Remove the filler plug from the side of the transmission case with a proper size wrench. The fluid level should be even with the bottom of the filler hole.

  3. If additional fluid is necessary, add it through the filler hole using a siphon pump or squeeze bottle.

  4. Replace the filler plug; do not over tighten.

hope this helps


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