Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 01-26-2014, 04:42 PM   #1
Scraperondubz
Stock
 
Join Date: Feb 2010
Location: Oakland
Posts: 8
Scraperondubz is on a distinguished road
Unhappy Transmission Problems

I have a 1987 automatic n/a. Has been giving me trouble. When I start it up the idle is really high around (1500-1800) jumps into reverse gear when I shift but when I put it into drive it takes off like it is in overdrive (very slow). 2 acts as 3rd gear and low acts as 1st. It will not shift on its own. I replaced the ECT ECU and their has been no change. I attempted a transmission diagnosis but the light does nothing when I put the jumper wire in. The ect power, and o/d button do nothing accept turn the lights indicator on and off. The speedometer is also off and the cruise control doesn't work.
Transmission fluid level is good and has good color.
No check engine light is on I am clueless ass what to do next.
Any help is good help.
Scraperondubz is offline   Reply With Quote
Old 02-01-2014, 05:14 PM   #2
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

Every part you're having trouble with requires a speed signal from the speedometer. Find which section of the speedometer cable is broken and replace it. It runs from the passenger side of the transmission up along the firewall and through the firewall at the rear of the engine.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 02-02-2014, 01:21 PM   #3
Scraperondubz
Stock
 
Join Date: Feb 2010
Location: Oakland
Posts: 8
Scraperondubz is on a distinguished road
Default

Quote:
Originally Posted by cre View Post
Every part you're having trouble with requires a speed signal from the speedometer. Find which section of the speedometer cable is broken and replace it. It runs from the passenger side of the transmission up along the firewall and through the firewall at the rear of the engine.
Ok so the speedometer works but the speed it reads is slightly off. Should I grab a speedo cable and a speed sensor?
Scraperondubz is offline   Reply With Quote
Old 02-02-2014, 05:35 PM   #4
interested!
3" Exhaust
 
Join Date: Apr 2011
Location: redhill surrey uk
Posts: 142
interested! is on a distinguished road
Default Transmission Problems

Quote:
Originally Posted by Scraperondubz View Post
I have a 1987 automatic n/a. Has been giving me trouble. When I start it up the idle is really high around (1500-1800) jumps into reverse gear when I shift but when I put it into drive it takes off like it is in overdrive (very slow). 2 acts as 3rd gear and low acts as 1st. It will not shift on its own. I replaced the ECT ECU and their has been no change. I attempted a transmission diagnosis but the light does nothing when I put the jumper wire in. The ect power, and o/d button do nothing accept turn the lights indicator on and off. The speedometer is also off and the cruise control doesn't work.
Transmission fluid level is good and has good color.
No check engine light is on I am clueless ass what to do next.
Any help is good help.

Hi! , You said the Transmission level is good , - Question ? , did you check this while the engine was running ? , the fluid is taken from the sump and enters the torque converter giving a lower reading than if checked with the engine stopped . Also take into consideration HOT and COLD reading levels .
interested! is offline   Reply With Quote
Old 02-02-2014, 06:00 PM   #5
Scraperondubz
Stock
 
Join Date: Feb 2010
Location: Oakland
Posts: 8
Scraperondubz is on a distinguished road
Default

Quote:
Originally Posted by interested! View Post
Hi! , You said the Transmission level is good , - Question ? , did you check this while the engine was running ? , the fluid is taken from the sump and enters the torque converter giving a lower reading than if checked with the engine stopped . Also take into consideration HOT and COLD reading levels .

Yes I checked fluid while car was running and at operating temperature
Scraperondubz is offline   Reply With Quote
Old 02-03-2014, 02:35 AM   #6
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

Ok, then I would go it by the book:

AT Computer Diagnosis
http://www.cygnusx1.net/supra/Librar...aspx?S=AT&P=13

AT Service Manual
http://www.cygnusx1.net/supra/Librar....aspx?S=AT&P=1
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Transmission rant, help! Need advice or anything, asap ochowdero MKIII Supra 117 04-11-2011 11:49 PM
86.5 auto transmission removal HELP!!! elmer MKIII FAQ 13 04-06-2010 11:41 PM
Should I try to rebuild my transmission, or leave it to experts? Busted Knuckles Non-Generation Specific Questions 1 04-15-2008 02:20 AM
87 MKIII transmission Problems phzi Non-Generation Specific Questions 1 06-26-2007 02:49 AM
1988 supra transmission problems cenile Non-Generation Specific Questions 5 03-20-2007 02:16 AM


All times are GMT. The time now is 03:50 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86