Auto tranny wont shift to 4th. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tetsusounds13 · 05-19-2013, 03:30 PM

Exactly as the title says. My '95 s14 won't shift to the fourth gear and for the life of me I don't know why. Please help!

coupesallday! · 05-19-2013, 03:40 PM

It probably needs to be rebuilt or you need a tps sensor

PeaceOnesxWai · 05-19-2013, 03:43 PM

overdrive is on?

tetsusounds13 · 05-19-2013, 05:08 PM

Is there a way to test the sensor before I actually go ahead and spend on one? And thanks for the tips!

future · 05-19-2013, 05:11 PM

Push on the over drive you fool

Lunghz · 05-19-2013, 05:13 PM

time for 5 speed?

tetsusounds13 · 05-19-2013, 05:13 PM

Quote:

Originally Posted by future

Push on the over drive you fool

I'm not a fool. Just slightly ignorant. Lol.

I did. That was the first thing I did, but no effect.

tetsusounds13 · 05-19-2013, 05:14 PM

Quote:

Originally Posted by Lunghz

time for 5 speed?

I'm working on it!

I'm just fed up with 3 speed so I'm looking for a quick fix

future · 05-19-2013, 05:23 PM

Try jumping the connection. Don't want to drive like that too long. My cousin blew his engine not fixing his problem

tetsusounds13 · 05-19-2013, 05:27 PM

Quote:

Originally Posted by future

Try jumping the connection. Don't want to drive like that too long. My cousin blew his engine not fixing his problem

Ok now I might sound like a fool. I have no idea how to do that. I might be able to look at the electrical diagrams, but I don't think I'd know how to do it properly.

tetsusounds13 · 05-19-2013, 05:28 PM

Quote:

Originally Posted by future

Try jumping the connection. Don't want to drive like that too long. My cousin blew his engine not fixing his problem

Does it reset if I turn off the engine? Does it continuously stay on OD?

genericforumname · 05-19-2013, 05:40 PM

I'm not going to claim I know a lot about auto's but don't they use solenoids to shift? could be that. otherwise my local Nissan dealer offers free diagnostics, maybe see if your will too. could be as simple as one call to set up a time to bring it in.

tetsusounds13 · 05-20-2013, 07:42 AM

Quote:

Originally Posted by genericforumname

I'm not going to claim I know a lot about auto's but don't they use solenoids to shift? could be that. otherwise my local Nissan dealer offers free diagnostics, maybe see if your will too. could be as simple as one call to set up a time to bring it in.

I'll be sure to take advantage of the free diagnostic.

Thanks for the heads up!

Frank_Jaeger · 05-21-2013, 10:16 AM

When you start the car check the O/D light near the windshield wipers. If it blinks count them.

tetsusounds13 · 05-21-2013, 11:16 PM

Quote:

Originally Posted by Frank_Jaeger

When you start the car check the O/D light near the windshield wipers. If it blinks count them.

I've checked for that light. The thing is, there is no flash at all. You're talking about the O/D flash that happens under the tachometer, right?

EchaKqulo · 05-22-2013, 04:56 PM

Quote:

Originally Posted by Lunghz

time for 5 speed?

I concurrrrr!!!!

Frank_Jaeger · 05-22-2013, 10:15 PM

Quote:

Originally Posted by tetsusounds13

I've checked for that light. The thing is, there is no flash at all. You're talking about the O/D flash that happens under the tachometer, right?

Yeah. I forgot you have an S14, I'm unfamiliar with their interiors. Maybe the bulb's burnt out?

Maybe the overdrive switch doesn't have continuity? Try bypassing it.

Flicktitty · 05-22-2013, 10:20 PM

For what it's worth.... check the fuse for your reverse lights. For some reason Nissan has the overdrive tied in with the reverse lights fuse.

tetsusounds13 · 05-23-2013, 11:06 PM

Quote:

Originally Posted by Flicktitty

For what it's worth.... check the fuse for your reverse lights. For some reason Nissan has the overdrive tied in with the reverse lights fuse.

Seriously? That seems highly inconvenient. I'll give it a shot.

tetsusounds13 · 05-24-2013, 12:05 AM

Ok for now thank you all for your tips. I still haven't foxed it, but for now I've made a new thread on a 5 speed conversion. If you would be kind enough to check it out and offer input, that'd be great! I know it's a little off topic, but I just couldn't resist with the 5 speed advice on this thread. XD

idlafie · 05-28-2013, 12:35 AM

Quote:

Originally Posted by tetsusounds13

Exactly as the title says. My '95 s14 won't shift to the fourth gear and for the life of me I don't know why. Please help!

How many miles do you have on the 95 S14? Are you the original owner?? Does the torque converter slip during heavy acceleration? Have you ever changed the transmission fluid & transmission filter?? Try putting the Engine Control Module, (ECM), into Diagnostic Mode & see what code the ECM kicks out. Use the SEARCH function here on ZILVIA to locate a FACTORY SERVICE MANUAL for your S14.

I'm having the same problem myself, (I've got a 95 S14 also), but I know what the issues are with my S14....the previous owner did a poor job maintaining it!! I swapped out the tranny fluid & filter & put in Redline D4 Auto tranny fluid, Red Line Synthetic Oil - Automatic Transmission Fluids - D4 ATF, and it seems to have helped. I still have an intermittent shifting problem...won't go into 4th sometimes... but I think the problems are with old / failing / dirty solenoids inside the transmission. Anyone ever take one out & clean it??

Anyhow, hope this helps.....

ID

tetsusounds13 · 06-05-2013, 07:44 PM

Quote:

Originally Posted by idlafie

How many miles do you have on the 95 S14? Are you the original owner?? Does the torque converter slip during heavy acceleration? Have you ever changed the transmission fluid & transmission filter?? Try putting the Engine Control Module, (ECM), into Diagnostic Mode & see what code the ECM kicks out. Use the SEARCH function here on ZILVIA to locate a FACTORY SERVICE MANUAL for your S14.

I'm having the same problem myself, (I've got a 95 S14 also), but I know what the issues are with my S14....the previous owner did a poor job maintaining it!! I swapped out the tranny fluid & filter & put in Redline D4 Auto tranny fluid, Red Line Synthetic Oil - Automatic Transmission Fluids - D4 ATF, and it seems to have helped. I still have an intermittent shifting problem...won't go into 4th sometimes... but I think the problems are with old / failing / dirty solenoids inside the transmission. Anyone ever take one out & clean it??

Anyhow, hope this helps.....

ID

Thanks a lot brother! So far I switched out the TPS. I thought it would be best to do so since the one it had probably is freakishly old and it looked in not so good of a shape. I adjusted the voltage to .48 ~ .49. I haven't tested the results yet since i'm doing it as i type.

Haven't been able to update or do much since it was finals.

Thanks for all the help!

tetsusounds13 · 06-05-2013, 08:11 PM

I would like to see if it's the OD. Does anytime b know where I can trace the OD circuit or something specific that controls it?

tetsusounds13 · 06-06-2013, 02:46 PM

also, I checked the tranny fluid. I read that if it's good, then it should be a red color (which it is).

Flicktitty · 06-06-2013, 02:59 PM

did you ever check the fuse for the reverse lights?

tetsusounds13 · 06-06-2013, 04:49 PM

Quote:

Originally Posted by Flicktitty

did you ever check the fuse for the reverse lights?

I looked at the electrical diagram for it, and I can't possibly see how it's related to the OD issue. :/ I'll check the fuse anyways.

could it possibly be the OD relay fuse?

Flicktitty · 06-06-2013, 05:05 PM

it may be, I just know my 2JZ s13 coupe i pulled the reverse light fuse since my reverse lights dont work, to replace a different fuse in a pinch and the overdrive never worked. Put a fuse in and the issue was fixed, i know it's REALLY strange.

tetsusounds13 · 06-06-2013, 05:24 PM

Quote:

Originally Posted by Flicktitty

it may be, I just know my 2JZ s13 coupe i pulled the reverse light fuse since my reverse lights dont work, to replace a different fuse in a pinch and the overdrive never worked. Put a fuse in and the issue was fixed, i know it's REALLY strange.

Damn, my brain is wrinkling...

On the side note, i neither can't find the reverse light fuse -_- i can't even find a proper diagram for the fuse box.

97nismo · 06-06-2013, 06:13 PM

Its your torque converter.... After it warms up does it shift into 4 th?....also u will lose reverse pretty soon at least i did. Nissan told me it was a sensor regulating the tranny on the torque converter or some crap or the converter itself idk. A shop quoted me 1500 to fix and so i did a sr redtop swap with a 5 speed lol

tetsusounds13 · 06-06-2013, 07:29 PM

Damn it this is beginning to sound expensive. Lol. Ok does anyone know where the OD relay is because I've looked EVERYWHERE and I can't find it. Might it be on the a/t control unit? Im gonna try with that fuse before I full swing begin the 5 speed swap since I still need a few parts

05-19-2013, 03:30 PM	#1
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	Auto tranny wont shift to 4th. Exactly as the title says. My '95 s14 won't shift to the fourth gear and for the life of me I don't know why. Please help!

05-19-2013, 05:13 PM	#6
Lunghz Zilvia Junkie Join Date: Apr 2012 Location: Moreno Valley Age: 30 Posts: 452 Trader Rating: (13) Feedback Score: 13 reviews	time for 5 speed? __________________

05-22-2013, 10:20 PM	#18
Flicktitty Post Whore! Join Date: Apr 2007 Location: Wisconsin Age: 38 Posts: 3,686 Trader Rating: (13) Feedback Score: 13 reviews	For what it's worth.... check the fuse for your reverse lights. For some reason Nissan has the overdrive tied in with the reverse lights fuse. __________________ 2JZ-GTE Swapped S13 Coupe - 1994 Supra Turbo

06-06-2013, 02:59 PM	#25
Flicktitty Post Whore! Join Date: Apr 2007 Location: Wisconsin Age: 38 Posts: 3,686 Trader Rating: (13) Feedback Score: 13 reviews	did you ever check the fuse for the reverse lights? __________________ 2JZ-GTE Swapped S13 Coupe - 1994 Supra Turbo

06-06-2013, 05:05 PM	#27
Flicktitty Post Whore! Join Date: Apr 2007 Location: Wisconsin Age: 38 Posts: 3,686 Trader Rating: (13) Feedback Score: 13 reviews	it may be, I just know my 2JZ s13 coupe i pulled the reverse light fuse since my reverse lights dont work, to replace a different fuse in a pinch and the overdrive never worked. Put a fuse in and the issue was fixed, i know it's REALLY strange. __________________ 2JZ-GTE Swapped S13 Coupe - 1994 Supra Turbo

05-19-2013, 03:43 PM	#3
PeaceOnesxWai Zilvia FREAK! Join Date: Mar 2010 Location: SoCal Age: 33 Posts: 1,220 Trader Rating: (34) Feedback Score: 34 reviews	overdrive is on?

05-19-2013, 05:08 PM	#4
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	Is there a way to test the sensor before I actually go ahead and spend on one? And thanks for the tips!

05-19-2013, 05:40 PM	#12
genericforumname Zilvia Member Join Date: Sep 2007 Location: Florida, where we prove that shit does in fact run down hill Age: 36 Posts: 229 Trader Rating: (0) Feedback Score: 0 reviews	I'm not going to claim I know a lot about auto's but don't they use solenoids to shift? could be that. otherwise my local Nissan dealer offers free diagnostics, maybe see if your will too. could be as simple as one call to set up a time to bring it in.

05-21-2013, 10:16 AM	#14
Frank_Jaeger Zilvia FREAK! Join Date: Jan 2012 Location: Port Charlotte, Florida Age: 33 Posts: 1,352 Trader Rating: (1) Feedback Score: 1 reviews	When you start the car check the O/D light near the windshield wipers. If it blinks count them.

05-24-2013, 12:05 AM	#20
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	Ok for now thank you all for your tips. I still haven't foxed it, but for now I've made a new thread on a 5 speed conversion. If you would be kind enough to check it out and offer input, that'd be great! I know it's a little off topic, but I just couldn't resist with the 5 speed advice on this thread. XD

06-05-2013, 08:11 PM	#23
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	I would like to see if it's the OD. Does anytime b know where I can trace the OD circuit or something specific that controls it?

06-06-2013, 02:46 PM	#24
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	also, I checked the tranny fluid. I read that if it's good, then it should be a red color (which it is).

06-06-2013, 06:13 PM	#29
97nismo Nissanaholic! Join Date: Oct 2008 Location: Asheville Posts: 2,133 Trader Rating: (53) Feedback Score: 53 reviews	Its your torque converter.... After it warms up does it shift into 4 th?....also u will lose reverse pretty soon at least i did. Nissan told me it was a sensor regulating the tranny on the torque converter or some crap or the converter itself idk. A shop quoted me 1500 to fix and so i did a sr redtop swap with a 5 speed lol __________________ Feedback: http://zilvia.net/f/itrader.php?u=78978

06-06-2013, 07:29 PM	#30
tetsusounds13 Leaky Injector Join Date: May 2013 Location: Los Angeles Posts: 61 Trader Rating: (0) Feedback Score: 0 reviews	Damn it this is beginning to sound expensive. Lol. Ok does anyone know where the OD relay is because I've looked EVERYWHERE and I can't find it. Might it be on the a/t control unit? Im gonna try with that fuse before I full swing begin the 5 speed swap since I still need a few parts