Diff change low to high

[johns]

Hi new to mini trucks and to the board. I was the winning bidder on some 1995? hijet trucks that came from a plant. They are in low and I need to find out how to change to high. A guy that used one at the plant said they could be changed and the company ordered them in low side. They also have a governor that is set at 25 MPH that I need to figure out how to disconnect. I also need to find a good place to get parts? thanks for any help you can give Johns

[scesnick]

Johns,

Do you mean they are in "4wd Low" right now? and you want to get them into "2wd High" ? I'm sure it is a simple process but i am not familiar with the Hijets.
As far as parts go, I would suggest visiting some of this boards sponsors sites. You can find the banner at the top of the page.

[greg0187]

If they are left hand drive. I believe they are electronically governed or by the transmission. Is it a 3 speed?

[johns]

They are 2 wheel drive and left hand steer. thanks johns

[johns]

And they are 4 speeds. thanks Again johns

[greg0187]

When you get to the 25MPH mark do they cut off or are they wound out?

[johns]

Yes they just hit 25 and start surging, I unpluged the wires that plug in to module that is on the side of the tranny with the speedometer cable to it. Then it dies plug the wires back in and it starts back up. They are also real low gear no need to start out in first you can use 2nd or 3rd. thanks johns

[greg0187]

Sounds like you may have found something. Maybe its just a dry contact thats normally closed. Use an OHM meter to see if it has continuity. If its near zero try twisting the two wires together.

-Greg

[johns]

FYI: Just recived e-mail from the plant the secret is

Take Oil out of Tranfer Case
Take Off Drive Shaft
Remove back plate from transfer case
Remove Snape Ring from Shift Rail
Then put everything back together
Pull lever on floor to high

thanks still working on govenor problems thanks L.J.

[matt419]

John, there is an access panel on the left side of the transfer case. It has 4 bolts holding it on. You can shift it into high there. It is atight squeeze but that is how I was told to do it. I have 1 just like it and it is in low range.

[greg0187]

Good Info. Thats crazy its 2WD but has a transfer case?

[Gawdzuki]

2wd Suzuki Samurai's have a transfer case...;).

[Dan]

I had a kid on the crew in the early 90's that figured out the governor and i was constantly removing a paperclip from the pigtail on the daihatsu's transmission.

[golfcartguy]

Ok, Somebody please tell me how to remove the governor for my non - US mini.

[Dan]

all of your other posts say that you have a lefty american cushman "White truck"???

They are the most complex governors ever created if you have anything powered by mitsubishi that was americanized for US specs. Transmissions were internally blocked from using all of the gears. ignitor boxes (ECU's) will limit the rpm's and cut off the fuel. fuel relays shut down the pump and close fuel solenoids. speed sensors built in to the instrument cluster shut it down too. all of these things are tied together and will not operate at all if you interfere with any of them

I worked on figuring it out for a while and gave up. I'm sure there is a way but, i quit trying and i gutted the ignition system, bypassed the fuel relays, modified the distributor, flipped the rotor, advanced the ignition wires one terminal , installed a new "MSD" ignition system from a speed shop. i took apart the transmission and rebuilt it without some of the plugs and blocking collars that i found to be in the way of the shift rails.

Search the threads and you'll find most of your questions have been asked and answered many times over.

[98 SNAKE EATER]

Don't give up, Don!!

I'm relying on you to figure this crap out :o

Only reason why I'm considering getting another LHD Mitz :D

[Dan]

i didn't give up on beating the limiters. i just quit trying to use the existing system. Replacing the ignitor with the new "MSD street fire" ignition fixed all of my problems. I either abandoned or bypassed the things that it was controlling. rpm and speed sensors were abandoned along with the coil wires. fuel relays were bypassed. distributor slightly altered to be able to set correct timing. I'm going to work on the traction and suspension issues now that it has nothing to hold it back.

[golfcartguy]

Thanks again Dan

[98 SNAKE EATER]

i didn't give up on beating the limiters. i just quit trying to use the existing system. Replacing the ignitor with the new "MSD street fire" ignition fixed all of my problems. I either abandoned or bypassed the things that it was controlling. rpm and speed sensors were abandoned along with the coil wires. fuel relays were bypassed. distributor slightly altered to be able to set correct timing. I'm going to work on the traction and suspension issues now that it has nothing to hold it back.


That's cool

I have a leftover MSD 6AL unit with timing control from my 70 T/A :cool:

The timing control box allows up to 15* advance/retard

http://static.atechmotorsports.com/global/images/prod/large/msd-8680.jpg

I know you said the stocker had 30* of timing built in, but would the 15* on the MSD timing control be enough so that you wouldn't have to alter the distributor?



Rick

[Dan]

That might just do it. I couldn't retard it enough because of physical restrictions so i moved the wires around by one tower and advanced it to the correct timing. Its bolt is about 1/2" outside of the mounting slot in the distributor. I used a "6a" for the first experiment and then found the cheaper "street fire" unit for the second one. the old plugwires didn't handle the extra voltage well so i changed them also. only after being shocked a few times like i was hit with a stun gun.

[98 SNAKE EATER]

Great :)

The timing control knob came in handy when I used to drive my T/A daily with 13.5:1 CR :rolleyes:

Anything less than race gas meant I had to pull timing waaaay back or risk sounding like a diesel truck :o

Yikes, I can only imagine what 116 octane is going for nowadays :eek:

[Longmtnman]

Has anyone been able to remove the snap ring through the access cover on the transfer case? I took the cover off and can see the ring with a mirror but don't think I have enough hands/coordination to manipulate the light, mirror and long needle nose pliers. I might make an attempt but it is a risky job. If I can get the ring off the shaft and drop it, I'll have to possibly take the transfer case apart to retrieve it. It may cause me to say a bad word.

[gumballf355]

It was very hard to do... I had to stick a strong magnet in there to catch the clip from falling into the gear case oil. Speed limiter was a breeze tho.

[Longmtnman]

Once the clip is gone and the fork moves to high, what keeps the fork in place? Is there an indentation on the shaft for the spring loaded ball bearing to settle into?? My Hijet is 100% off road and I'm not trying to get more top speed, just fewer revs when I'm on the straight and level.

[gumballf355]

The fork is on a slide shaft... all you have to do is remove the clip and make sure you don't drop it.

[Radar]

this is real good detailed info but I wonder if I can get my 4wd van xfer case into a low gear. Anyone tried that with the same method but in reverse?

[gumballf355]

Same thing, just pull the clip.

[havman]

My mini is a 2 wheel drive. Left hand steer. Same problem? About 25 mph it just shuts down. Slow it down a little and you can go again. What is the speed control switch under the dash on right side against fire wall. When I switch it it, it does not seem to affect anything including the speed. Any help would be appreciated.

[gdelony]

I have a 1989 that had the same issue, mine now hits 57MPH in high gear. If your engine is like mine; I removed the C-Clip in the tranny as mentioned in a previous posting and removed the high and low cut off solenoids from the carburetor. I then plugged the solenoid orifaces of the carb with short metric bolts ensuring no fuel leaks and ensuring the bolts did not interfere with the fuel stream. Once this was done, the trick was to resize the internal fuel bowl oriface(where the solenoid plunger once was internally limiting fuel to the jets at high rpm) to the proper size to avoid flooding. If this sounds as helpful I can elaborate. I made no other modifications and the speed was there.

This modification has proven 100% reliable, my computer module does not even know the difference, full power to redline.

[gumballf355]

There is actually a much easier way to fix the speed limiter problem... no need for the removal of any solenoids and plugging up orifaces in the carbs. Good troubleshooting though.

[gdelony]

I always manage to find the most difficult way, how simple? Mine did have a rusty paper-clip in the harness, I heard afterwards this was probably a "fooler".

[Dan]

yup... I've seen the paperclip or jumper wires on the pigtail to the transmission. worked on a few of mine at a golfcourse in the 80's.

[havman]

Could you tell me the easy way in which to fix my problem with the speed limiter. Would appreciate any help I could get. The solenoid thing sounds a little complicated to me.

Appreciate any info you can give me. , Jim

[Dan]

Do you know if it is locked in to low range? if not locked in low and still only 25mph you can look for the pigtail that runs to the speed sensor on the transmission and jump the wires together that lead to the sensor. There should be two pairs of wires back there. one is for the reverse lamp. The other should be the speed sensor.

[havman]

This is a two wheel drive pickup. I doubt if there is a low range. Are you talking about the sensor under the dash?? I'm not familiar with speed sensor on the transmission.
There is a sensor under the glove box that has a switch on it but nothing happens when I change it.

[gdelony]

I know in maunal transmissions the two wheel drives often have a low/ high range, it will be a Low/High lever directly behind the stick shift, a short little lever next to the parking brake. If you pull the lever all the way up you can feel it engage with a light "clunk", if you pull it up and it resists the c-clip/ snap ring is installed in the tranny. I would reccomend checking this first.

[havman]

There is no shifter for a low high range in my truck. Just an emergency brake and the regular four speed shifter.

[gdelony]

Assuming all four gears work, I would bet jumping the sensor on the tranny would give you what you are looking for.

[havman]

I,ll give this a try. Thanks for the help.

[gumballf355]

There is no shifter for a low high range in my truck. Just an emergency brake and the regular four speed shifter.

http://media3.dropshots.com/photos/149/20080702/195507.jpg
Does your center console look like this?? See between the shifter and e-brake there is another handle that's pulled up? Thats the hi/low/Neutral select in High Gear.
http://media4.dropshots.com/photos/149/20080702/195445.jpg

[havman]

My interior is identical to the inside of this mini accept there is no high low shifter in mine. I wished there was for an easy fix. Where the high low shifter is in this truck I have nothing. Not even where it might have been at one time. What year is this truck you have? My truck is a 1991 s80. Maybe there is a high low box under neath of mine. Today I will try and send some pics of my truck.

[Timetripper]

havman: I see you have posted a couple of times that your truck is a 2wd.
It might be that there was some 4wds that were limited to 2wd drive by lock outs in the transfer case.
These trucks can be converted back to 4wd by the procedures mentioned.

If your truck does not have a front drive shaft and drive axles to the front wheels then yours is indeed a 2wd.
Also for reference the transfer case is at the very back of the transmission right where the driveshaft to the rear wheels hooks up.
If your transmission just tapers back to the rear driveshaft then you don't have a transfercase for the 4wd.

[Mighty Milt]

i think the biggest question that should be answered is if your truck will really turn some RPM's or if it falls flat on it's face at 25mph. if it's reving good but doesn't have the gears to go any faster then you need to address the hi/low issue. if you have the gears to go faster but feel it just "fall on it's face" at 25mph you need to address the speed governer. JMHO

[havman]

You maybe correct. It just feels like the fuel shuts off at about 25 or 30 mph. Seem like it could go faster. You can slow down and restart the truck with the clutch or the starter. This why I think that the fuel is shutting off.

[Mighty Milt]

yep that's a speed limiter! it cuts off fuel supply i think. that's why you have to crosswire the sensor on the trans or removed the solenoids on the carb. good luck.

[havman]

Thanks Mighty Milt.
I,ll have to check into the speed limiter. Would this be on the trans or high low gear box?

[havman]

Mighty Milt, Sent some pics to tips and tricks section. You might check them out.
Thanks, Jim