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I have a 1988 Ford Ranger automatic transmission. When I place it in park it will not move. I have to rev up the rpms to get it to engage. Then it runs fine until I shift out of drive then I have to rev it up again to get it to engage. Reverse works fine with no problems.
If reverse works fine, then I don't think this is a linkage or cable problem.
A few possibilities: Trans fluid is low, front band is burnt up or out of adjustment, vacuum modulator is leaking, front pump has developed a weak relief spring or the first gear clutch pack is toast.
Check your trans fluid with the engine warmed up and running and the truck parked on a fairly level surface. Fluid should be pink with no stink. Top off if needed. If the fluid is low, pull the vacuum line off the modulator; If it has trans fluid in it, it's failed and needs to be replaced.
If you adjust the front band, adjust both. Trans should be STONE COLD. Loosen the jamb nut and tighten the adjuster until it bottoms. DO NOT OVER TIGHTEN. tighten until it stops with light pressure, don't crank down on it. Once the adjuster bottoms, back off (loosen) 1 quarter turn and then tighten the jamb nut.
If these 3 don't help, you're looking at a rebuild.
I should also add that I recently purchased this truck the previous owner had swapped the tranny, it was not an exact swap as the replacement tranny does not have a speedo cable. I also dropped the pan and changed fluid and filter, both looked fine.
That's part of your problem right there; The previous owner swappped in a newer transmission. If the wiring doesn't match and your truck doesn't use a PSOM (Power Speedometer/Odometer Module), the lock up won't work and this is probably causing your delay in drive engaging.
If you can't wire this to work, you may need to swap in the correct transmission.
I have a 1988 ford ranger 2.9L V6 autom 2 wheel drive. Whin i put it in drive it jerks real hard to where the engine dies. I've changed the fluid and filter and it still does it what should i do.
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