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Auto Transmission Problems - 90 RX7 Convertible

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Old 06-17-05, 08:34 PM   #1
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Question Auto Transmission Problems - 90 RX7 Convertible

Hey Guys:

I could use some advice or a link to some pertinent articles/threads if anyone has any information concerning the following:

I recently changed the fluid and filter of my 1990 RX7 Convertible Automatic Transmission. Say, 3 weeks ago. I am now experiencing...........

1) All Gears are able to be accessed with the Shift Lever, and car goes into all Gears (P, R, N, D, S, L)

2) Shift Indicator on Dash only shows "N", even when car is in Park.

3) While running and driving, the car starts off fine while depressing the accelerator for a second or so........then shifts into high gear. It takes forever to wind up and get going. Seems to reset itself at every stop light. This is a new problem, so for about 1-3 seconds when a first start off from a stop, I think the car is we go again!!!!!!!!!!

I have stopped driving the car, as it is a little dangerous not to have the get up and go to compete with a bicycle..........

I have checked the Vacuum Line that is attached to the side of the Transmission (Drivers Side......on Tail of Transmission, a bit in front of Speedo Cable) ....wiggled it around a bit to make sure it was snug.....and pushed it back on to make sure it was tight. ( Might I need to remove this, silicone it to make sure it is sealed and slide it back on?) It seemed that it was affixed properly when I first took a look at it. I also tightened the speedometer cable cover at the Transmission as it seemed loose. Not really sure if that is the right Component name for what I tightened......sort of a thimble thing that went around the cable.....with a hex on one end...and knurled round on the other (Speed Sensor) was leaking a bit of I gave it a quick turn.

I believe that this is either a Vacuum Problem ( I am going to pull Vac readings in the next few days) or an electrical problem. But, as I am not familar with the eccentricity of these cars........I could be way off base.

Anywhey...........If anyone out there has any imput as to what I might be experiencing, I would surely appreciate any help or advice.........

and by the way guys......I know I ought to just yank the damn thing out and put the 5 Speed in.....but she is a daily driver, and I don't have the parts setting in my I feel kinda lame having my Wife shuttle me back and forth to work.......LOL. Waiting on a ride sucks.......even if some good lookin chick is coming to get you......I just need to get it fixed quickly, so that I can look at my options.........however, after reading through a lot of posts.....the 5 SPD sounds like the way to go.

Thanks for any help in advance!
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Old 06-18-05, 01:10 AM   #2
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I don't know if the RX7 transmission are electronic or not but I'll base my opnions of my thunderbird's transmission.

On a 4R70W Transmission, if it shifts too early, a few things could cause it;

1) Not Enough/Too Much fluid
2) Bad MLPS (Neutral Saftey Switch)
3) PCM (Power Control Module) - basically controls everything in the tranny.

I wish I could help you out more!

Good Luck

- Tech
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1990, 90, accerlator, auto, automatic, fast, fluid, gear, high, leak, problem, rx7, shifts, slipping, tranny, trans, transmission, troubleshooting

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