Dead R150f?

Alright so I'm pretty sure my manual transmission in my 1996 4Runner is officially dead. Before I go into symptoms and such I'll just give a brief history.

169,000 miles, OEM clutch went out. Marlin Crawler clutch kit purchased. Pressure plate, throw out bearing, clutch disk. Even shift bushings replaced. And it felt great.

177,154 1st motor blew a rod out the side of the block and threw the oil pan. The throw out bearing had been squealing prior, so with the motor out anyways, I had it replaced.

Around 190,000 I started having trouble going into first gear from a stop. I replaced the master and slave multiple times and they were not the issue.

201,800 My issue was diagnosed as a dead pressure plate. So the clutch was replaced again. Center force this time. New flywheel again and throw out bearing along with everything else.
This made it so I could get into first from a stop, but it wasn't great.

So now my current symptoms are as follows.
1st gear isn't possible from a stop. You need to downshift into first before making a stop or turn the car off, put it in first, and then turn the car on.
2nd gear loves to grind. 1st to second at anything above 3k RPM.
3rd gear seems normal
4th gear: very difficult going from 3rd to 4th at lower rpms
5th seems normal.

With the clutch depressed, I can't get in to any gear from a stop. Hydraulic system is good. The clutch or transmission is at fault somehow.

 

Any input Jason @Speed Freek

 

As in adjusting the pedal, I did that and the problem is still there

 

When was the last time you replaced the tranny fluid?

 

The one I shouldn't change is the one with the sensor on it that tells cruise control the clutch isn't in correct?

I'll try adjusting it again after class.

 

Your symptoms sound exactly like mine when I had a shop put my brand new Stage 2 clutch in a couple weeks ago and they put it in backwards Ruined the clutch, but the symptoms leading up to it's demise were exactly what you are describing here, minus #1 (I could get it into first from a stop but it wasn't easy, probably would have done the same as yours if I kept that clutch in for a few more days).

I highly doubt that the transmission is bad, it sounds like something is causing your clutches to fail prematurely though. Unless you're just really unlucky with new clutches or maybe your last one was put in backwards too. The Toyota tech that had to undo the previous shop's shitty clutch job on my truck told me that the performance clutches don't go in the same way that a standard OEM one does, and that's why they put it in backward. He showed it to me after he took it out.

These manual transmissions are built to last, I'd be surprised if it was toast.

 

Subd for outcome.

 

It was the Truck Shop in San Diego that installed the one at 169k and it was Sierra Expeditions that installed the last one. So both shops with plenty of experience with these trucks.

Fluid was replaced when the last clutch was done

 

Drain the fluid and see what comes out, next step would be to drop the trans and check the clutch. I blew my r150 up 2yrs ago, i was acclerating away from a stop light in 1st when it banged and popped out and after that would pop out of first when under load. It made a grinding noise in every gear but 4th and would randomly pop out and spew fluid all over the place. Turns out i ran it dry due to a leaking seal between the trans and the tcase.

Moral of the story, check the fluid firat and go from there. Also post this up on marlin crawlers forum or call them, they were very helpful diagnosing my issue.

 

Sounds good. I'll follow the FSM for pedal adjustment and then do this.


Thank you!

 

Its a hydraulic clutch, theres not much to adjust.

 

Slander, what seal was the culprit? Tranny output seal or TC seal?

 

Synchros?

 

Trans output seal leaked fluid into my crawl box.

 

No it did not. I was within spec, but the push rod is basically maxed out. It's not going any farther out.

 

my 98 taco is going into a reputable shop tomorrow and getting it torn apart. I have almost exact same problem except I can't get into second. The other gears seem fine - 4th is noisy when engaged. This just happened all of a sudden. Just lost 2nd gear. Feels like it kind of goes in and then just grinds with no engagment. I have a Marlin Crawler Clutch kit, new slave cylinder. New Fluid. Put 10,000 on the clutch before this happened. I will also post up on here what happened or what they find. I'm hoping it's something easy but we'll see.