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Discussion Starter #1
I have to pull my 1998 V6 4WD manual trans because of bad transmission input bearing. My truck has 250k miles. I greased the driveshaft almost every oil change. No known noise or issues - wondering if it's a good idea to take the drive shaft (rear only) to a shop for a checkup? I worry that even if nothing is wrong they will find something even though I'm happy to pay for inspection.

Also wanted to ask - there is no way to get a socket on the driveshaft flange nuts/bolts, correct?
Reason I ask is that I have had the driveshaft off a few times and I use a 12 point box wrench and a mallet but the nut corners are getting a little rounded. I can get some new nuts but I hate going to the dealer just for nuts.

Otherwise I may pick up a 6 point box wrench in that size as Amazon carries individual wrenches.

Thanks
 

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Discussion Starter #2 (Edited)
Ok, just tried a 14mm socket on the driveshaft nuts - works with a short 3" extension.
Now I recall that the bolts are the problem, no way to get a socket on and they are very short heads. I'll probably have to use the open end side of the wrench and hope it holds because when I put the 12pt closed end on it there is a lot of play.

I removed the driveshafts, I guess those bolts on the transfer case flanges are captive. My memory must be failing me:oops:
 

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Yeah, transfer case flange has pressed studs. If your center support bushing doesn't have excessive slop or bad bearing and the u-joints don't have stiff areas or have excessive play, you are fine.
 

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Discussion Starter #4
Thanks, also have to separate the transfer case from the transmission because i have to have the transmission serviced. The orange sealant between transfer and transmission is called out as 08826-00090. I see it on ebay for $36. Is it best to use this Toyota FIPG?
 

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I use ultra-black RTV for those mating surfaces. What service are you having done to the transmission?
 

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Discussion Starter #6
Bad input bearing, sounds like tumbling pebbles at idle and 1st, 2nd gear, especially when I run it all day (oil heats up I guess).
I had a shop change all bearings on a different Toyota trans before and it was far cheaper than a rebuilt. And from what I can tell on the rebuilt units they only change comps with obvious wear so they likely won't change all of the bearings.
 

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Make sure to change the pilot bearing on the crank while the trans is out. If that bearing is bad, it will cause the input shaft bearing to fail.
 
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