Reverse Problem with FZJ80

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

W

wampiFZJ80

10 Year 15 Year
Joined
Nov 4, 2008
Threads
6
Messages
47
Location
Los Angeles, CA
Hello all, I need some help. I have a FZJ80 1994 and so far the truck is been great. However, I noticed that the transmission has a small problem. When I go on reverse and I push on the gas hard, the reverse disengages. The reverse works perfectly as long as I do not try to go fast. The rest of the gears work well too. I have been offroading with it and I have not had any issues.

I would like to know if anyone has experienced anything similar and if you know what the problem might be. Thanks for your help.

By the way, the transmission is automatic.
 
I'm unclear about several things from your post. First, you say it happens when you push the gas hard (suddenly I assume), then you say it does it when you "go fast" like what - 30 in reverse? 40? These conflict with each other and are unclear.

The other thing I'm unclear about is "disengage". Do you mean suddenly the truck seems to come out of reverse and what - the engine revs freely while the truck slowly coasts to a stop? Or there's a sudden grinding sound and you let off the gas and stop? What??

Finally, how sure are you that this is a '94 and that the tranny is the original 94?

DougM
 
Hi, thanks for your reply.

I think you understood me right. What I meant is that when I go in reverse and try to go fast (more than 30 miles/hr), the reverse stops working. There is not grinding sounds or any other sound. The reverse just stops working and the truck does not move anymore. As soon as I go slower, the reverse works again. I do not have to turn off the truck to make it work again. I just stop pushing on the gas so I can go slower.

I am sure it is a 94 because that it is what says in my title. I do not know if the previous owner had done any type of work on the transmission. Therefore, I am not sure if the tranny is the original.

I hope this help. Thanks again.
 
Last edited:
Somewhere in the back of my mind, I recall there is a governor for top speed in reverse on the 80 for safety. Reverse acceleration presses the gas pedal even more and causes accidents. Anyone else have this inkling?

So, basically reverse works just fine, but when you get around 30mph it will not go past that speed?

DougM
 
Who tries to drive in reverse at 30 MPH? :eek:

(Trying to roll back the odometer?)

Sounds a lot like a governor to me. Does it cap exactly at 30, or at a specific RPM? (IIRC isn't there an RPM limiter too?)
 
Thanks all for your replies. I might have exaggerated on the speed. I do not know how fast I go when this happens and now that I am thinking, 30 miles/hr seems too much.

I know I took the truck to Toyota and they told me this was not normal. I also took it to AMMCO and they said the same. I did not leave the truck with them because when I bought the truck, I also bought a two-year warranty that covers transmissions. I took it to the shop that is covered by my warranty for repairs. Unfortunately, they do not seem to find what is wrong. That is why I wanted to see if someone else has gone through the same trouble.

Could someone try a small test on a FZJ80 for me? Just go on reverse with some speed to see if the truck experiences the same problem. Maybe is something standard like it was mentioned in this forum.
 
wampiFZJ80 said:
Could someone try a small test on a FZJ80 for me? Just go on reverse with some speed to see if the truck experiences the same problem. Maybe is something standard like it was mentioned in this forum.
Click to expand...


I'll try and remember to test it today. If you could tell us the speed and RPM that you're hitting the limit at, that woud go a long way too.
 
do our 80s show an accurate speed while going in Reverse? Guess I've never noticed this before - too busy looking at what I'm gonna run into I guess!
 
alia176 said:
do our 80s show an accurate speed while going in Reverse? Guess I've never noticed this before - too busy looking at what I'm gonna run into I guess!
Click to expand...

I was trying to remember the exact same thing. I'm not sure the speedometer even moves at all.....
 
Slipping in reverse

My 96 lx450 slips in reverse as well, it does this when I punch the gas in reverse, or sometimes if I'm just reversing up a steep incline. Mine is definately a tranny slip because you can hear it. Other people have mentioned this problem before with the a343 on earlier posts click here , your tranny should be a a442, though. Check the build date and verify what model tranny it is. In any case, I have just learned to live with it, if I'm trying to back up with a trailer on of up a steep grade, I just put it in low and there is no problem. Also, I don't find the need to reverse at 30+mph too often (only when performing J turns which can get tricky in a lifted cruiser)
 
Wampi,

With 5 posts on this forum you're not likely to get anybody out there running 30mph in reverse. Seems too much like a prank phone call. I thought you were going to verify, yet now you're back asking others to do it??

DougM
 
Hi everyone. I finally got my truck back today after the mechanic finally found out the problem and fixed it.

Thanks everyone for your interest and help. Just in case someone else experience the same problem, I will ask the mechanic for an exact description of what it was done to my transmission. In the mean time, this is what he wrote in my receipt:

Rebuilt transmission and replaced neutral safety switch.

Thanks
 
Holy moly, that had to be an expensive repair!
 
So, have you tried Reverse speed yet?

DougM
 
jam a flat head screw driver in the little hole above the park sign. I'm pretty sure i had the same problem, but i'm not sure exactly.
 
Bogman said:
jam a flat head screw driver in the little hole above the park sign. I'm pretty sure i had the same problem, but i'm not sure exactly.
Click to expand...

That hole is for when you can't get out of park when you press the brake pedal down.
 
You must log in or register to reply here.

Share this page

IH8MUD Forum | Toyota, Lexus & Off-Road Community
Community platform by XenForo® © 2010-2026 XenForo Ltd.

© 2000-2026 Tie Rod Media LLC

Back
Top Bottom