91 sl no overdrive - 3000GT/Stealth International Message Center

mheidemanjr · 10-13-2009, 05:55 PM

well it will shift thru 1-3 fine but as soon as it hits overdrive it goes in to nuteral? but if i rev the piss out of it it will catch for a second and the go back to nuetral? any ideas?

creynolds · 10-13-2009, 06:18 PM

Very likely that your end clutch is going out. Not a difficult fix, though. Pull off your right front wheel and the transmission shielding and the end clutch is right there. If the plates are warped or the friction material is worn smooth, this is likely your problem. Somebody on here has a great write-up on replacing it. I used it when I did mine earlier this year.

IPT has a nice upgraded end clutch kit. Go to Import Performance Transmissions and select the first item on the Mitsubishi ATX page. "IPT End Clutch Kit (new and improved again)." $89 and well worth it.

Recommendations: Get a pair of snap ring pliers for this. It will make the install much, much easier. Also, be sure to soak all the pressure plates in tranny fluid before assembling the new kit. Just note how the old one came off and put the new one on the same way. All the teeth have to line up as it's sliding back on, though. Don't force them if they're out of line or they'll bend.

creynolds · 10-13-2009, 06:34 PM

Update: found the write-up on replacing the end clutch. Here it is.

mheidemanjr · 10-13-2009, 06:47 PM

Quote:

Originally Posted by creynolds

Update: found the write-up on replacing the end clutch. Here it is.

well i am glad to hear its only a 90 doller part thanks man!

creynolds · 10-14-2009, 11:23 AM

No problem. Like I said, I did it earlier this year and loved it. The only thing that made it take longer than an hour was messing with the snap ring because I didn't have the pliers for it. Get a pair of those and it's a quick, easy job.

And for that $90, you get the end clutch with all new gaskets as well.

If you feel I've helped you out, positive rep is always nice.

JJay · 10-21-2009, 01:51 PM

I have a 1992 Stealth R/T Non-turbo automatic. What happens with my car is It slips into nuetral as soon as the overdrive button is engaged. If I don't engage the overdrive I can drive the car out of overdrive. Do I have the same problem or is it different if you have a 5-speed verses and automatic? Let me know what you think. I have to drive my car with overdrive NOT ENGAGED and I think it burns more gas that way.

creynolds · 10-21-2009, 02:11 PM

Quote:

Originally Posted by JJay

I have a 1992 Stealth R/T Non-turbo automatic. What happens with my car is It slips into nuetral as soon as the overdrive button is engaged. If I don't engage the overdrive I can drive the car out of overdrive. Do I have the same problem or is it different if you have a 5-speed verses and automatic? Let me know what you think. I have to drive my car with overdrive NOT ENGAGED and I think it burns more gas that way.

This problem is specific to the automatic transmission. The issue you have is exactly what happened with mine last year. Having overdrive on disengages the tranny after 3rd gear, slipping it into neutral when it should shift into 4th. Turning it off lets you drive 1st through 3rd with no problem, but then you don't have 4th.

I think you will burn more gas that way only at speeds above, say, 45 or 50, when you might want to be in 4th gear. You can fix that with the IPT end clutch kit and the write-up I linked to. I think you'll find, when you take your end clutch apart, that the friction material on the pressure plates is worn smooth compared to the new plates in the kit.

I think it saves me a decent bit of gas because, with a SOHC engine and an end clutch that actually works, I can do 65 on the freeway at only 2500 rpm. Like I said, cheap, easy fix. $90 plus a pair of snap ring pliers and an hour of your time should take care of it.

Damn, IPT should be giving me commissions on their end clutch sales, haha. Again, I would appreciate positive rep if you feel I answered your question. Let me know how it works out, guys.

JJay · 10-22-2009, 06:46 PM

Thanks Cyreynolds. I will get right on that and let you know how it turned out. Right now the car in question is sitting in another state in my cousins garage and I will be picking it up in a month or so....but I will come back to the thread and upadate on how it turned out. Excellent exhange of information as usual on www.3si.org!

talon3kgt · 10-29-2009, 08:15 AM

i was reading these threads and it sounds alot like what i got perhaps you can help me here we go. I have a 1993 3000gt automatic it has no overdrive if you turn it on it goes into neautral also very slugish in acceleration. Heres the catch tho i had the transmission rebuilt and nothing fixed it. I need help cause its sitting around cause i cant pour money in gas cause no overdrive. Is it the tranny computer, a shift sensor, the ECU, ?.

drgonzo3000 · 10-29-2009, 09:42 AM

If you had the tranny rebuilt I would take it back and have them fix it the correct way! Just cause they rebuilt it doesn't mean they fixed the problem. They may have just put the end clutch from the old one back into the transmission.

I would start with replacing the end clutch as the stock ones seem to wear out fast. I have heard nothing but good things about the IPT end clutches.