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Discussion in 'Ram Trucks' started by SnoFarmer, Apr 13, 2007.

  1. SnoFarmer

    SnoFarmer PlowSite Fanatic
    from N,E. MN
    Messages: 9,883

    98, 2500
    Fresh rebuild, RV shift kit and removed the drain back valve.

    Q. Would you increase the line psi. or leave it alone?
  2. Ggg6

    Ggg6 Senior Member
    from IL
    Messages: 521

    The problem with increasing the line pressure on a CDX trans is the stock pump was not designed for any higher pressure than stock, and the tolerances and seals inside will not hold the pressure so it just bypasses or as some would say leaks pressure internally. This is not specific to your trans it is common in almost all CDX trannies, as they are designed to work with relatively low line pressures compared to Ford and GM trannies. That is not to say the other brand trannies are better, they just run higher line pressures. They all have their own issues because they are designed as light duty trannies, then put behind medium duty engines.
  3. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    I'd agree with gg6 here, most transmissions respond well to a line pressure increase but it just seems to do more harm than good with the Dodges, usually just leads to broken apply pistons and wear on the front pump.

    RODHALL Senior Member
    Messages: 374

    727 and 518/46re/rh we alwalys turn them up a little. the newer 48's we don't.

    more line presser will give it firmer shift .... but as said to much can kill it quicker.
  5. Oshkosh

    Oshkosh PlowSite.com Addict
    Messages: 1,655

  6. SnoFarmer

    SnoFarmer PlowSite Fanatic
    from N,E. MN
    Messages: 9,883

    Thanks for the input,
    I'll leave the line psi alone.