whats wrong with my car

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whats wrong with my car

Postby kylelyk on Mon Oct 27, 2008 10:27 pm

can anyone help me out. i have a 1990 nissan 240sx automatic. i was driving it down the highway until it just stopped moving.there was no noise when this happened, i just started coasting. my engines good but the tranny just isnt catching. i can put it in drive reverse 1, 2 and nothing happens but my engines revs. i changed the transmission with another automatic thinking it would fix the problem. but it didnt. i still have the same problem. i really dont know what it could be. can anyone give me some suggestions to what might be wrong? thank you.kyle.
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Re: whats wrong with my car

Postby thetest on Tue Oct 28, 2008 12:24 am

All Right... when you changed the tranny did you also change the tranny control unit (ATCU)? if not, it could be the culprit... otherwise look at the manual in the drivetrain section for diag procedures.

here's a link to an online manual: http://www.240edge.com/manuals/89-90_240sx/auto_tra.pdf

the link will take you to the said manual, go to p.20-21 for the '90 240sx section, also look at the first few pages to get more details...

here's the excerpt for diagnostic procedure (missing images, which is why the link is provided, check p.21)

240SX (1990)
1) Ensure engine is at normal operating temperature. With
ignition switch in OFF position, set overdrive switch to ON position.
Move selector lever to "P" position. Turn ignition switch to ON
position, but DO NOT start engine. If OD OFF indicator lamp comes on
for about 2 seconds, go to next step. If OD OFF indicator lamp does
not come on for about 2 seconds, see Fig. 11.
2) Turn ignition switch to OFF position. Push shift lock
release button and move selector lever to "D" position. Set overdrive
switch to OFF position. Turn ignition switch to ON position, but DO
NOT start engine. Wait for more than 2 seconds, after turning ignition
switch ON, and move selector lever to "2" position.
3) Set overdrive switch to ON position and move selector
lever to "1" position. Set overdrive switch to OFF position. Depress
accelerator pedal to floor and release. Set overdrive switch to ON
position. OD OFF indicator lamp will flash trouble code. Refer to
appropriate SELF-DIAGNOSTIC CODE chart. See Figs. 16-20.
Fig. 11: Diagnostic Procedure 1 (240SX - 1990)
Courtesy of Nissan Motor Co., U.S.A.

hope that helps,

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Re: whats wrong with my car

Postby Nismo on Tue Oct 28, 2008 1:22 am

Sounds like the torque converter kicked the bucket.
"Don't put the power on, till you know you never have to take it off" -- Sir Jackie Stewart
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Re: whats wrong with my car

Postby kylelyk on Tue Oct 28, 2008 4:20 pm

where is the tranny control unit located?
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Re: whats wrong with my car

Postby thetest on Tue Oct 28, 2008 10:48 pm

Nismo wrote:Sounds like the torque converter kicked the bucket.


maybe, but then it would be noisy and it could prevent the engine from turning...

where is the tranny control unit located?


RTFM (Read The F***in Manual) :P no seriously look up the manual i posted, it should tell ya, or do a parts location look up at another part of the manual
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Re: whats wrong with my car

Postby Nismo on Wed Oct 29, 2008 12:25 am

thetest wrote:
Nismo wrote:Sounds like the torque converter kicked the bucket.


maybe, but then it would be noisy and it could prevent the engine from turning...



Had the torque converter go in both the Oldsmobile and the Caravan.

Both felt like a box of neutrals.

No noise, no gears... just engine revving.
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Re: whats wrong with my car

Postby kylelyk on Wed Oct 29, 2008 3:14 pm

i changed the torque converter when i changed the tranny
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Re: whats wrong with my car

Postby Nave on Wed Oct 29, 2008 11:44 pm

Scrap the slush box and put in a 5 speed. :grin:
- 90 Coupe a la SR
- 90 Coupe a la KA
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Re: whats wrong with my car

Postby markatos on Thu Oct 30, 2008 2:58 pm

Nave wrote:Scrap the slush box and put in a 5 speed. :grin:


Or a six-speed straight-cut dog-box?
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