Question about 1984 Nissan 300ZX
We put in a new transmission the other day and found out that it only has forward gears, park, and nuetral. when we put it into reverse, it is just a forward gear. what can I do? is it the inhibitor switch or the TCU?
Pburcham: In studying up on your problem, I could only come up with a few possibilities from your description.
1. Linkage adjustment
2. A problem with the "Low and reverse Brake band"
however, this usually has a symptom of poor acceleration
due to the transmission slipping. That band has to grab the drum to hold for low gear.
3. Problem with the manual valve in the valve body.
4. Damaged seals causing pressure leakage which will keep the clutches from locking up.
5.Defective "High Reverse clutch" (front) check ball
Possibly a few other things, but everything (unfortunately) is still internal. The inhibitor switch is for the starting circuit and just keeps you from starting the car in anything but park and neutral.
Transmission control unit will not have this harsh an effect. It should operate without the TCU. You should be able to do a manuel shift with the transmission.
Sorry I couldn't be of more help.
I can say one thing, these transmissions were not known for failures, consequently should be a dime a dozen in salvage yards.
Why or how you got a bad one?????? Don't know?
If I can help, let me know........
Posted on Apr 23, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 23, 2012 | Cars & Trucks
May 17, 2012 | 1993 Saab 9000 Hatchback
Jan 31, 2011 | 1987 Nissan Sentra Wagon
Jul 14, 2010 | 1992 Jeep Cherokee Limited
Dec 25, 2009 | 1995 Mitsubishi Eclipse
Apr 26, 2009 | 1995 Mitsubishi 3000GT
260 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: