I tried the fancy syn gear oils. Always had problem with shifting into 2nd gear, especially when it was cold. Called an engineer buddy that works for Toyota who also has a nice Gen2 truck. He told me to stop, and use Valvoline 75W90.
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I don't know year breaks specifically, but different years had slight differences. In my R150F, 5th gear was held on to the countershaft with a stake nut, whereas on the new AX15 countershaft I put in, 5th gear is held on by a snap ring.About to rebuild a grindy 3rd gear r150f myself. Are there year break ax15 gears and counter? With the pre 95 r150 I think there are year breaks for bearings and maybe synchros. I'd love to do this upgrade.
I was told no syn in the tranny. TC and diffs, yes, but not tranny.Pappy, I see Valvoline 75W90 is available as synthetic or just regular dino. Both have limited slip additive and both are GL5. Both say ok for NON syncro manual transmissions that specify GL4. Are you running it? I wouldn't imagine any damage but I notice a difference in shifting whenever I run GL5.
Output shaft play in the bearing retainer was one of my thoughts as well, as that would allow the input and output shafts slightly separate.Could the damage been done thanks to the bearing retainer you're upgrading with the Marlin crawler retainer plate (play)?
I've also seen a lot of mentioning of work input shafts on the r150/ax15, do you have any recommendations on what to check for?
I'd purchase and fsm for this but I've read where the fsm isn't much help with the r&r of the 150 internals. There is at least one decent YouTube video on this.
Also any recommendations on the bearing separator sizes to press the gears/bearings off the main shaft?
I'm still running MT-90 and have been happy with it. Downshifting to 1st will always be notchy, I think. That's been my experience with all of the manuals that I have driven. 2nd is fine in mine, but 3rd is notchy depending whether I'm romping on it or just cruising. How do you like your short shifter? (Like a lot of things in 2021 and 2022, it was out of stock!)A very interesting read, I wish I had access to this when I was rebuilding my r150 in 2020 lol. Anywhere I have all the marlin goodies in mine as well. Along with all new mainshaft gear bearings and support bearings. I replaced all mainshaft gears except 2nd because nobody made a replacement at the time. So my issue is upshifting into 2nd. Pretty darn notchy! I wish I had thought of scuffing up the cone on 2nd when I was reassembling it! So when I broke mine in after rebuild I ran LiquiMoly 80-90 true Dino GL4 in mine for 30 miles. Had to tear it back apart because the stick would vibrate in 3rd. Replaced the synchro hub, 3rd gear, and the shift sleeve and keys. Reassembled and threw in some more LiquiMoly 80-90 and broke it in for about a thousand miles. and switched to redline MT-90. All the other gears are shifting fine, however, upshifting into 2nd and downshifting into 1st are quite annoying. I don't have to force it in. But I do have to wait 3-5 seconds longer than the other gears. So im hoping switching to a different oil would help. What would you guys recommend? Here's some pics of my rig/trans build.
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Pretty happy with the short shifter, expensive, but definitely an improvement! Changing gears faster definitely helps keeping up with traffic a little easier haha. But everybody in Colorado drives at least 15 over the speed limit and in the only one that seems like I stay 5 over and I'm holding every body up lol. I may consider regearing again. The 4.88s and 33s are too short for street driving and I'm already in 5th by the time I hit 50mph. So I may go back to 4.56 or 4.30. My brothers 3rd gen with 4.10s, 33s and the short shifter has wayyyy better performance than mineI'm still running MT-90 and have been happy with it. Downshifting to 1st will always be notchy, I think. That's been my experience with all of the manuals that I have driven. 2nd is fine in mine, but 3rd is notchy depending whether I'm romping on it or just cruising. How do you like your short shifter? (Like a lot of things in 2021 and 2022, it was out of stock!)
Interesting points on the gearing.Pretty happy with the short shifter, expensive, but definitely an improvement! Changing gears faster definitely helps keeping up with traffic a little easier haha. But everybody in Colorado drives at least 15 over the speed limit and in the only one that seems like I stay 5 over and I'm holding every body up lol. I may consider regearing again. The 4.88s and 33s are too short for street driving and I'm already in 5th by the time I hit 50mph. So I may go back to 4.56 or 4.30. My brothers 3rd gen with 4.10s, 33s and the short shifter has wayyyy better performance than mine