Alum drums in automatics

west coast · 09-10-2016, 10:27 PM

Ok working on a new transmission is there anything different to do when you have an alum drum? Different band adjustment? different service intervals ? My current trans has lots of runs on it, so the new trans I would like to last just as long.

Alan Roehrich · 09-10-2016, 11:06 PM

If the drum has a band that rides on it, you need a special band, or the drum needs a special coating, or both.

Are you talking about a PowerGlide?

west coast · 09-11-2016, 12:08 AM

C4 Alto red band Have to double check on the band

Alan Roehrich · 09-11-2016, 01:28 AM

In any event, both adjustment and shift timing are critical. If the band drags on the drum, due to being adjusted wrong, or due to improper shift timing, the life of the drum will be shortened. A lot of drums are now hard anodized, coated, or sleeved. That extends their life greatly. In the case of drums that have to be stopped by a band, getting it stopped quickly and completely is critical for the life of the drum. Of course, a good clean release is as well.

Bob Mulry · 09-11-2016, 01:21 PM

Hi,

Do yourself a favor and call the manufacturer of the drum and see what their recommendations are................

Then you can either follow them or not..............

Bob

09-10-2016, 10:27 PM	#1
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 606 Likes: 12 Liked 217 Times in 70 Posts	Alum drums in automatics Ok working on a new transmission is there anything different to do when you have an alum drum? Different band adjustment? different service intervals ? My current trans has lots of runs on it, so the new trans I would like to last just as long. __________________ James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023

09-10-2016, 11:06 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: Alum drums in automatics If the drum has a band that rides on it, you need a special band, or the drum needs a special coating, or both. Are you talking about a PowerGlide? __________________ Alan Roehrich 212A G/S

09-11-2016, 12:08 AM	#3
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 606 Likes: 12 Liked 217 Times in 70 Posts	Re: Alum drums in automatics C4 Alto red band Have to double check on the band __________________ James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023

09-11-2016, 01:28 AM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: Alum drums in automatics In any event, both adjustment and shift timing are critical. If the band drags on the drum, due to being adjusted wrong, or due to improper shift timing, the life of the drum will be shortened. A lot of drums are now hard anodized, coated, or sleeved. That extends their life greatly. In the case of drums that have to be stopped by a band, getting it stopped quickly and completely is critical for the life of the drum. Of course, a good clean release is as well. __________________ Alan Roehrich 212A G/S

09-11-2016, 01:21 PM	#5
Bob Mulry VIP Member Join Date: Apr 2002 Location: Coarsegold, CA Posts: 1,016 Likes: 57 Liked 320 Times in 102 Posts	Re: Alum drums in automatics Hi, Do yourself a favor and call the manufacturer of the drum and see what their recommendations are................ Then you can either follow them or not.............. Bob __________________ Bob Mulry 7516 STK A & M Motorsports