putting in the tranny

Seth14 · #1 (**permalink**) 12-09-2010, 03:08 AM

I'm gettin ready to install a rebuilt tranny into my L99 F250. was just wondering what you guys thought on tranny fluid.....regular, mobile syn, or royal purple....its a diff of around 150 bucks from top to bottom.....talked to some other guys who said "The red stuff has been around a long time, you know it works", meaning the cheap stuff.

cj45lc · #2 (**permalink**) 12-09-2010, 05:23 AM

I'd go with whatever the rebuilder recomends. Mercon has been around a long time..

dmd · #3 (**permalink**) 12-09-2010, 06:59 AM

If it is rebuilt with all new seals you should be able to run Mercon V, if not then
get the Mercon III/ Dextron that is recommended for the trans

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