Change U joints while doing centre bearing?

Been getting some vibrations in my 2008 access cab v6 MT, with 160 000km on it. In 2x4 and 4x4, starts at 40km/h and seems to peak at around 90kmh. Vibrations are only under power - if I take the foot off the gas vibrations stop almost immediately.

It seems likely from the reading I've been doing here that its the centre driveshaft bearing going out. I did swap in 3rd gen front springs and leaf pack, and I added one leaf from my old pack so the rear has come up an inch or so which might contribute to the centre bearing going out. Also we had a lot of mud this fall which is probably not good for it. Theres also a thunk noise coming from the shaft area when shifting gears or applying more power.

But she's also at about the age when the wheel bearings might need replacement and I'm not ruling out that that might be the source of the vibes.

I'm thinking right now I'll order new wheel bearings and a centre bearing, but just start by doing the centre bearing and see if that fixes it, then do the wheel bearings a little later. But it seems to me I might as well do all the u joints at the same time, no sense in pulling the driveshaft again later. And I'm just worried that I'll get the shaft off and find a bad u joint anyways, then have to order one and wait.

What say you all? Anything else I could be missing? And should I check all the driveline angles in the process and shim the rear if required?

 

With 160K it would be good advise to replace the bearing and the U Joints. I would.

 

If you're going to have the driveshaft down already and considering you're at 160K KM, I would definitely change the u joints.

 

Decision time - greasable or non-greasable ujoints. Non-greasable tend to be stronger because they dont have grease channels. But, I went with non-greasable because I’m too lazy too grease them.

 

Ok that sounds like a consensus, thanks guys. Any ideas on brand of u joint? I'll go greasable, I feel like greasing up the joints keeps me aware of their condition.
Anything else to do while I'm in there?

 

I use Spicer.

$26 Spicer 5-213X U-Joint Kit 1330 Series (OSR)

https://smile.amazon.com/gp/product/B00DOI8TQW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Good thing about the greasable u joints is the excess grease splatter has a rustproofing affect on what it hits.

 

Spicer or Dana. Actually, I think its the same company.

 

At 125,800 miles, my midshaft flange broke because the stock u joints were bone dry. I replaced the flange, carrier bearing, and all u joints with greaseable Spicer ones. The vibration was an early warning, I had plenty of time to replace it, but kept driving a little too long.

It's been fine for another 40k miles. I grease them every other oil change.

2006 Prerunner parts, might not fit your 4x4.
Spicer u joints

$32 5-1330-1X U-Joint Kit

5-1330-1X
Spicer carrier bearing 5002334
Spicer midshaft flange C2-4-2449 - SKU# 3304-262
Toyota transmission output seal 90311-40034