Strange clicking noise under hard acceleration

[TiAgX5]

I've had the standing start ratchet noise for a few months now. Need to get a new chain and tear into it. DS outer CV boot torn too.

[Joshdub]

Get on it. I have a feeling that it aids in striping the driveshaft.

[Ricky Bobby]

Great to know Josh - Btw I've read that there are actually 2 different (similar) Tcases for the pre-facelifts, the NV125 and the LWX500 - does it say on the outside of the case which one you have? Would be helpful when I tackle this to be sure I'm getting the right parts - the driveshafts are all the same but I'm sure the internals of the case might be slightly different.

[TiAgX5]

Originally Posted by Joshdub

Get on it. I have a feeling that it aids in striping the driveshaft.

I feel the same way. Been driving it easy.

[TiAgX5]

Originally Posted by Ricky Bobby

Great to know Josh - Btw I've read that there are actually 2 different (similar) Tcases for the pre-facelifts, the NV125 and the LWX500 - does it say on the outside of the case which one you have? Would be helpful when I tackle this to be sure I'm getting the right parts - the driveshafts are all the same but I'm sure the internals of the case might be slightly different.

The TC case has a model tag RB. readily visible from below.

[Clockwork]

Guys. what makes you think its a chain and not a drive shaft issue when you hear the "ratcheting" clicking sounds from under vehicle when you switch from Park to Drive or Drive to Reverse or any combo of that nature?

[TiAgX5]

The driveshaft spline will get worse REALLY fast (vehicle will be un-driveable in a few days), the tc chain ratchet will remain constant for months.

[srmmmm]

Originally Posted by Clockwork

Guys. what makes you think its a chain and not a drive shaft issue when you hear the "ratcheting" clicking sounds from under vehicle when you switch from Park to Drive or Drive to Reverse or any combo of that nature?

There is no warning on the drive shaft. Splines don't slip, they simply fail.

2002 X5 3.0 291,000 miles
2014 428i 12,800 miles
2004 325i sold at 123,600 miles (currently on eBay)
2001 325i sold at 66,000 miles

[srmmmm]

Originally Posted by Joshdub

I thought about getting all new seals, but at $50 a seal I figured I'd wait and see what ends up leaking. It's not that difficult to remove the tcase with the right tools. I got that top driver side bolt with a swivel and a couple extension. I got the other ones that had minimal space with a external torx wrench.

The TC seals were the one item the dealer added when they installed the used case for my drive shaft repair. I guess it paid off since I haven't had any leaks in 155,000 miles since then.

2002 X5 3.0 291,000 miles
2014 428i 12,800 miles
2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles

[Joshdub]

Originally Posted by TiAgX5

The TC case has a model tag RB. readily visible from below.

Yeah its on the back half, right above the drain plug. Mine is the NV125. Im not sure exactly what uses the other one.