Getting Through Your R150F Transmission Rebuild
If your old Toyota is beginning to sound like a container of rocks when you're cruising throughout the highway, it's probably time to start thinking about an r150f transmission rebuild . These types of gearboxes are total tanks, found behind the 3. 0L and 3. 4L V6 engines within 4Runners, Pickups, plus T100s for decades, but your hardest hardware eventually gets tired. Whether you're dealing with an awful grind when moving into second or a constant hum that goes away whenever you push the particular clutch in, taking the plunge in order to refresh the internals is way much better than just waiting with regard to it to grenade for the trail.
Why these gearboxes eventually get tired
The R150F is really a legend with regard to a reason. It's a heavy-duty five-speed that can handle a lot associated with abuse, especially compared to its smaller sized cousins like the W56. But let's be real—most of these trucks have 200, 000 or even 300, 500 miles on them by now. Over that will much time, the particular synchronizers (those metal rings that help the gears match up speeds) naturally thin out. When they get too thin, they can't do their own job, and that's when you obtain that painful crunch every period you try in order to shift quickly.
Aside from the synchros, bearings are usually the other large culprit. The input shaft bearing takes a lot associated with load, and once the hardening on those rollers starts to pit, it creates a "whirring" noise. If you allow that go as well long, the have fun with in the shaft can actually cause the gears to misalign, and that's when things obtain expensive. Doing a good r150f transmission rebuild now is definitely a lot cheaper than trying to find an entire brand-new gearset because you overlooked a $40 keeping for two yrs.
Getting your own workspace and equipment ready
Prior to you even believe about cracking the case open, you've have got to be honest along with yourself about your own tool situation. This isn't a "basic socket set" kind of job. You're going to require a decent hydraulic shop press—at least the 12-ton, though the 20-ton makes living much easier. There are usually several gears and bearings that are pressed onto the shafts with the lot of pressure, and you aren't getting them away from using a hammer and a prayer.
You'll also need an actually good set of snap-ring pliers (the heavy-duty ones, not the cheap types that bend) plus a few different gear pullers. A long-reach puller is nearly mandatory for getting 5th gear away the back of the countershaft. Oh, and don't forget the workspace. Transmissions are usually messy. You'll want a large, clean workbench where you can lay parts away in the precise order they came off. If a person just throw almost everything in to a bucket, you're going to have a very bad period trying to keep in mind which way that will thrust washer experienced three weeks through now.
Diving into the teardown
Once you've obtained the transmission out there of the truck and on the bench, the true work begins. The R150F is really a "sandwich" style case. You'll be removing the front bellhousing and the rear extension casing first. One issue that trips individuals up is the shifter interlock bolts and the detent balls. There are small springs and steel balls tucked in to the side associated with the case that hold the change rails in location. Don't lose these. I usually use a little magnetic wand to pull them out the moment I remove the plugs so these people don't go bouncing across the garage floor into a dark corner.
As you start pulling the shafts out there of the advanced plate, take photos. Lots of them. Take a photo prior to you remove a snap ring, have a photo of the gear orientation, plus take a photo associated with the synchro hubs. Even if you possess a factory service manual, a real-life photo of your specific components can be a lifesaver. You'll likely find that will 1st and second gear are the almost all worn, as they observe the most action in stop-and-go driving or crawling over stones.
The component where things get tricky
The center of an r150f transmission rebuild is dealing with the main shaft assembly. This is usually where the push comes into play. You'll be pushing off gears in order to get to the inner bearings and the synchro rings. When you're looking in your parts, pay out close attention to the synchros. Nearly all high-quality rebuild products come with upgraded bands. If you're fortunate, you will probably find some that have a friction coating, which helps the shifting sense much crisper compared with how it did back in 1992.
While you're inside, check the "dogs" or the little teeth on the gears on their own. When the teeth are usually rounded off through years of milling, a new synchro won't completely fix the problem—the transmission might still appear from gear below load. If the particular gear teeth look like they've experienced a blender, you may want to source a few replacement hard components, which is where things can obtain a bit costly. But usually, a typical kit with bearings, seals, and synchros covers 90% associated with what ails these units.
Placing it all back together
Disassemble is basically the teardown in reverse, but along with a lot even more cleaning. You would like every single component to be spotless. I like to use a little bit of assembly lubricant or even just clean gear oil on everything because it extends back collectively. You don't would like the first several spins of the shaft to be "dry" while you're waiting around for the essential oil to circulate after you install it.
One of the most satisfying parts of the job is clicking on the shift track back in place plus feeling that solid, notch engagement that will was missing prior to. Make sure a person use a high-quality FIPG (Form-In-Place Gasket) or even a great RTV like Ultra Grey intended for the case halves. You don't want to do just about all this work just to have a puddle of equipment oil on your own driveway the following early morning because you went cheap on the particular sealant.
The particular "while you're within there" list
Since you've already been through the trouble of pulling the transmission, it's a total waste of your time not to look at the encircling parts. This is usually the perfect time to swap out your clutch, pressure plate, and throw-out bearing. Also, please, for that love of your own sanity, replace the particular pilot bearing within the flywheel. It's a $10 component that can cause massive headaches if it fails.
One more thing to check is definitely the rear major seal on the motor. If it's also slightly damp, change it. It'll never ever be easier in order to access than this is right now. Finally, take an appearance at your shifter seat and rose bush. Toyota uses a plastic seat at the bottom of the equipment lever that ultimately turns into breadcrumbs. In case your shifter felt like a tea spoon in a bowl of oat meal before the rebuild, a new $15 shifter seat will certainly make it sense like a brand-new truck.
Breaking it in and final thoughts
After you've hoisted that heavy animal back in the truck and filled it with a GL-4 gear oil (make certain it's yellow-metal secure for all those new synchros! ), take this easy for the particular first few 100 miles. You want the new bearings to seat correctly and the synchros to bed in. You might notice the shifting is stiff at first, but that's normal. It will smoothen out while you put some high temperature cycles through this.
An r150f transmission rebuild isn't exactly the "Saturday afternoon" task for a newbie, but it's totally doable if you're patient and structured. There's a specific kind of satisfaction that comes through shifting through the things and knowing exactly what's happening inside that metal box because you put every piece right now there yourself. Plus, it's a whole lot better than investing five grand on a newer truck that will probably doesn't have half the spirit of an outdated Toyota anyway. Just take your time, maintain your parts arranged, and don't force anything with the press—if it feels wrong, stop and double-check your breeze rings. You've got this.