1/2 -1 inch lateral play in driveshaft when pushed, pulled. CSB?

[txtorquemade]

From under the car, up on jacks and ramps, I push the driveshaft side to side (latereally) and theres about an inch of play. It actually moves that much.

When I accelerate from a stop, I frequently get a thumping behind and between the front seats, from the tranny tunnel. Or so that is how it sounds. I also have heard a howling from the rear worse when turning right, so Im thinking thats a L rear wheel bearing.

Is this the CSB? U joints look ok from what I can see, except 1 of the 4 bolts that attach the rear ujoint of the DS to the diff flange is gone. The play in the driveshaft seems to confirm CSB for the thumping. I think.

Ideas anyone?

Thanks...

[Teaguer]

Yes that points directly at a bad CSB.
How are you able to pull on the d-shaft and not see the csb though?
Is your heatshield still installed or not?

[txtorquemade]

Heat shield still there Teager, and I cant see shit. But it moves when I push against it about and inch. I wonder is the missing diff flange bolt the cause, or do I need new ujoint and or DS also?

Looks like the guibo has a crack as well.

BTW Teager, know anyone good for doing an install on the guibo, CSB, trans output seal and diff seal?

[KVF]

You could also get side to side play if the retaining bolts for the CSB mounting bracket are loose. This obviously comes to mind because you mention missing a bolt at the rear end as well. Having just done my complete drive-line I can say it's not that tough of a diy. At the very least I'd pull the shield, replace the lost bolts/nuts and make sure everything is properly tightened to see if that fixes the issue. Good luck.

[txtorquemade]

You could also get side to side play if the retaining bolts for the CSB mounting bracket are loose. This obviously comes to mind because you mention missing a bolt at the rear end as well. Having just done my complete drive-line I can say it's not that tough of a diy. At the very least I'd pull the shield, replace the lost bolts/nuts and make sure everything is properly tightened to see if that fixes the issue. Good luck.

That sounds reasonbable. Problem is I cant get under the car well with my current jack and stands/ ramp. If I had a lift no doubt it would be very doable. Might just have to take to an Indy mech.

But man I hate to for sure. So I might try your advice first. Maybe to the guibo CSB.

[M-technik-3]

make your own ramps out of 2x8's.

[evilnickwong]

I had the exact same thumping sound from between the seats which sounded like it was right under the handbrake console.
It turned out to be the CSB, and subsequently a bad driveshaft. Not sure if driving around with the driveshaft thumping caused it to go bad or if it was already bad in the first place, but I ended up replacing both. :D

[txtorquemade]

Yeah.. Im really not wanting to hear new drive shaft, but ..... ugh!!

[txtorquemade]

make your own ramps out of 2x8's.

Got any schematics for that lil build?

Srsly!!