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mt_goat · 12-11-2008, 07:43 AM

Quote:

Originally Posted by ahickman

My 94 3.0 Runner is on the road and runs reasonably smooth except when shifting from Park or Reverse into Drive. Almost jumps when put in gear. Doesn't seem to do it when going from Neutral or Park into Reverse. Idle is about 900 RPM.

I recently rebuilt the engine, but have done nothing to the transmission. I have done a number of searches on the various forum in an attempt to answer my questions, but have not found enough info for the following quesitons:

1. Given that the runner has 177K miles on it and I don't know what maintenance has been done to the tranny, what does everyone recommend doing as preventive maintenance? Fluid flush, filter replacement, fluid exchange, etc.? I have hear on more than one occassion that a complete flush is not recommended as it may dislodge buildup and clot jets/ports.

2. What ATF fluid is recommended?

3. ATF fluid is low on dipstick (below FULL mark when hot). Would this be the culprit for the sudden lunge/jump when moving to Drive?

I know little to nothing about AT's and need advice.

Thanks,

Aaron

1. That's a tough call, I probably would myself as long as it didn't look too bad. But I'd drop the pan and clean the magnets & pan and change the filter (with OEM).

2. Dex III, but I've been using Mobil 1 ATF. They (mobil) makes one that is specially for Aisin trannies, but I haven't tried that one because I've never seen it in a store.

3. Are you checking it with the engine running and hot after going through all the gear selections? If so just add a little bit to bring it up to full.

My Taurus shifts hard too and I don't know what it is. I've flushed it with Mobil 1 ATF and have the fluid level correct. It mainly does it when its cold.

Here's a good write-up on flushing: http://www.gadgetonline.com/TransFlush.htm