{"id":32226,"date":"2016-07-26T13:28:50","date_gmt":"2016-07-26T18:28:50","guid":{"rendered":"http:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=32226"},"modified":"2016-07-26T13:28:50","modified_gmt":"2016-07-26T18:28:50","slug":"transmission-filter-change-1988-gmc-sierra","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/07\/transmission-filter-change-1988-gmc-sierra","title":{"rendered":"Transmission Filter Change 1988 GMC Sierra"},"content":{"rendered":"

\"transmissionWhat are the signs of a dirty transmission filter. When\u00a0 is it time for a transmission filter change?<\/p>\n

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RESPONSE<\/p>\n

Shouldn’t be any signs, most transmission filters are changed by age instead of fluid color.<\/p>\n

It is recommended that the transmission filter and fluid be changed every 12,000 miles according to the manufacturer. for 3\/4 ton trucks and larger. Every 15,000 miles for 1\/2 ton trucks.<\/p>\n

Use Dexron lll(r) or its superseding fluid<\/span> type.<\/p>\n

Check the level of the fluid<\/span> at least once a month. The fluid<\/span> level should be checked with the engine at normal operating temperature and running. If the truck has been running at high speed for a long period, in city traffic on a hot day, or pulling a trailer, let it cool down for about thirty minutes before checking the level.<\/p>\n

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  1. Park the truck on a level surface with the engine idling. Shift the transmission<\/span> into \u00a0P<\/b>\u00a0and set the parking brake.<\/li>\n
  2. Remove the dipstick (on newer models, you may have to flip up the handle first), wipe it clean and reinsert if firmly. Be sure that it has been pushed all the way in.<\/li>\n
  3. Remove the dipstick and check the fluid<\/span> level while holding it horizontally. All models have a HOT and a COLD side to the dipstick.<\/li>\n<\/ol>\n