Game ova

Is it normal, or would it prevent the band from holding as it should?

Jays_SSZ28

iTrader: (2)

Looks normal to me.

A normal 4L80E drum might look smooth (in case someone brings that up) it's because they use a smooth band.

The th400 uses a grooved rear band

Game ova

Thanks.

PBA

This was caused by the very hard material used on the band, and this is normal wear for the TH400. The late 4L80E band is a "Hi-Energy" type of material and is much easier on this drum.

MaroonMonsterLS1

I know this is a 2016 thread...and I'm usually a stickler about bumping old threads.
But I think this one is short and sweet enough to add a little info for the next guy googling some info.
The th400 and early 4l80e (pre 95) front planet band surface was roughly 15RC
The smooth 4l80e surface is around 20RC
This probably plays a good role in how long the surface lasts.

PBA is correct that the new material on the band is also much "nicer" to the surface also.

mrvedit

Yikes, when I saw you posting on a 4 year old thread, I expected Fireworks!
But then you are the (im)poster.
Of course you, as a fantastic, knowledgeable and generous contributor, are always welcome to add to any thread.

Notice to Newbies: One reason we frown on people posting on long-dead threads is that everyone who posted or subscribed to that thread then gets an update notification by email. This is especially true for threads with many posts.
In this case as MaroonMonster pointed out, the thread was very short; plus he is a highly trusted expert contributor. So Newbies, please don't try this at home.