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My mechanic suggested I go for a 1pc steel shaft. So he got one made. The new shaft feels like its half the weight of the OEM one with the bearing. The OE shaft front half OD is 60mm, and rear section OD is 82mm. The 1 pc is 75.15mm, in between both diameters. Here is the drawing I made. I...

I guess I am going to leave it for now, and not go tighter, the irony is the diff was rather quiet with toyota 85W-90 oil, I recently switched to amsoil 75W-110 and there is more noise. I am going to switch back to toyota 85W-90. In theory, it should be possible to get a proper preload with a...

https://gazoo.com/ilovecars/papercraft/car/supra-a70/ use google translate

Here are pics of how he secured the u joints.

Ok an update. I think everyone know about my propeller shaft rebuild. I just removed it and in the process I rechecked my pinion preload. It seems to still have preload but I also noticed that it has lost a little preload. There is a very slight hum especially when the diff "floats", meaning...

Unfortunately, the u joints were not swapped as per TSRM. you see, this so called pro removed the old U joint and replaced them with a compatible unit, without circlip cuts. So instead of securing with circlip, he put thick washers in the outside holes to "cap" the bearings, then welded the...

Indeed, I bought a beck arnley 75 Celcius and it was wildly inconsistent.

So most of you guys know my story last year, about my diff and steering centering. Well I finally settled my steering rack centering and got a full alignment and tire balancing and the car is going straight now. However, since I thought the car is ok now, I opened up the throttle and went up to...

In my experience with my previous car, aluminium radiators do not overcool. That being said, the stock radiator does its job well. I live in the tropics and the weather is always hot here. I have been stuck in traffic for long bouts of time, with the engine in idle (600 - 800rpm) with a slow...

Stock all original. My car has low miles.

I use Toyota Red, and mix at 60 water 40 coolant, because I live in the tropics, it's never winter over here.

More Updates There is a hum from 80 to 90kmh, but goes away over that speed, I went to 105kmh for a few seconds and its very quiet at that speed. For the most part, coasting decel is also quiet. There is some whine-hum when throttle is transitioning between accel and decel, when the ring and...

Ok I am back and drove the car for roughly 2 days for some short trips. Noticed a few things. Overall everything is stiil good. Noise isnt getting worse. I do notice some hum on slow decel (30kmh and less), and some hum on hard accel. Since I am still in the break in period and only put about...

I havent got the chance to put more miles on it, so far I have only gone about 80km on that Sunday itself. I am still in Italy and will only be back on the 25th. I plan to fill up a tank full and drive till i finish that tank before swapping out to AMSOIL synthetic fluid.

Here is a video showing the sound of the diff with the china made ring and pinion.

Ok update. I pmed Piratetip yesterday that that knock is back on reverse, but its very faint. So this morning I finally tested the car. I am glad to report that the diff is as close to perfect as possible, its like 97% there. Hardly any whine in accel and decel, and very faint "knock" at very...

I think I found the pinion spot that is causing the sound. It was two tooth upper from where I thought it was supposed to be, I cant feel any dent/lift with my fingers but I can see it with a magnifying glass. I proceed to dremel polish that spot the best I could. I then pulled 0.004" of the...

I replaced the carrier bearings today. I also received my new range of shims, 2.82, 2.85, 2.88, 2.91 and 2.94mm. So I reassembled everything, and from a 2.79mm Left shim I increased it to 2.85mm to get a good backlash. And indeed I got very good backlash. However, I still have that cyclical...

Problem is yellow compund is im possible to get, i used water colour before but it doesnt seem to give an accurate pattern . With the water colour it seems to wipe off the edges giving impression its too shallow. I decide to change the carrier bearings too just to make sure. The carrier bearing...

So it seems my trip is postponed to 6th, which is the following week, I took the chance to quickly rebuild the diff since i have everything, or at least i thought i did. When I took apart the China made gears, I saw the reason why it was so noisy. The scuff marks show that the pinion is too...