Trans failure question...

Greg Reimer 7376 · 06-18-2023, 09:47 PM

Got the trans out of the car. When I drained it and removed the pan, there is a good quantity of aluminum shrapnel in the pan.No large pieces, I don't know if it has an aluminum direct clutch hub, but it's getting a steel one this time around if it needs one. The input shaft doesn't seem to want to come out, but if the splines in the hub failed, that would account for the aluminum debris. The front pump drive lugs were all still there so further disassembly is next. At least now with the new flex plate rule coming in, this would be a good time to change that out as well.

Pat6868 · 06-19-2023, 12:38 PM

...

Steve Grady · 06-19-2023, 01:46 PM

Hi gear clutch hub breakage does not keep low gear and reverse from working.

Eman · 06-28-2023, 10:34 AM

What did you find?

Greg Reimer 7376 · 06-28-2023, 03:54 PM

Quote:

Originally Posted by Eman

What did you find?

Seemed like a bit of work here, right about the time the trans broke, the flywheel failure in the stocker that resulted in a rule addition happened, so I ordered a TCI flywheel and figured that when it arrived,I would install my other trans I wanted to try which is a 350. The 327 probably would love the extra low gear because it left like a cannon ball with the 2.08 Glide. The input shaft on the Powerglide didn't break, neither did the front pump drive gear lugs. I dropped the pan and found aluminum shrapnel in the pan, but the rest of the trans doesn't seem too contaminated. The flywheel just came today, as did a new Simpson harness,so it's back to work time. I suspect the failure was planetaries since nothing works. We have a trans with Park and four neutrals. Once the car is fixed,I'll open up the Powerglide and I'll know more.

barnym17 · 06-29-2023, 07:52 AM

Not likely your issue but I had a powerglide that suddenly had no gears and it was the pump to case gasket that caused it.Replaced that and good to go.

Greg Reimer 7376 · 06-29-2023, 01:14 PM

Well, took some time and opened up the Glide that broke. It has a 2.08 low gear, an aluminum hi gear hub, straight cut planetaries, and the shrapnel was the teeth on the planets. Trans was pretty clean inside, the high gear clutches and the band looked pretty good, it was just the planetaries that failed. I don't know how many hundred runs this thing has on it, but it looks easy to fix and this could be considered long term routine maintenance. I'll be getting it to Leo shortly. I guess he moved from San Dimas to a new shop a bit further out. At least he didn't leave the state!!

Greg Reimer 7376 · 06-29-2023, 01:19 PM

Quote:

Originally Posted by barnym17

Not likely your issue but I had a powerglide that suddenly had no gears and it was the pump to case gasket that caused it.Replaced that and good to go.

Nothing like a good internal pressure leak to disengage things a bit. These transes are so simple they are almost ridiculous.

06-18-2023, 09:47 PM	#1
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,137 Likes: 172 Liked 719 Times in 220 Posts	Re: Trans failure question... Got the trans out of the car. When I drained it and removed the pan, there is a good quantity of aluminum shrapnel in the pan.No large pieces, I don't know if it has an aluminum direct clutch hub, but it's getting a steel one this time around if it needs one. The input shaft doesn't seem to want to come out, but if the splines in the hub failed, that would account for the aluminum debris. The front pump drive lugs were all still there so further disassembly is next. At least now with the new flex plate rule coming in, this would be a good time to change that out as well.

06-19-2023, 12:38 PM	#2
Pat6868 Member Join Date: May 2010 Posts: 103 Likes: 6 Liked 93 Times in 29 Posts	Re: Trans failure question... ... Last edited by Pat6868; 06-19-2023 at 12:48 PM.

06-19-2023, 01:46 PM	#3
Steve Grady Junior Member Join Date: Apr 2023 Location: Columbus, OH Posts: 90 Likes: 108 Liked 161 Times in 54 Posts	Re: Trans failure question... Hi gear clutch hub breakage does not keep low gear and reverse from working. __________________ Div 3 Sales, Service and Tech for many manufacturers

06-28-2023, 10:34 AM	#4
Eman Member Join Date: May 2014 Location: E TN Posts: 474 Likes: 16 Liked 133 Times in 76 Posts	Re: Trans failure question... What did you find?

06-29-2023, 07:52 AM	#6
barnym17 Junior Member Join Date: Jul 2012 Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: Trans failure question... Not likely your issue but I had a powerglide that suddenly had no gears and it was the pump to case gasket that caused it.Replaced that and good to go.

06-29-2023, 01:14 PM	#7
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,137 Likes: 172 Liked 719 Times in 220 Posts	Re: Trans failure question... Well, took some time and opened up the Glide that broke. It has a 2.08 low gear, an aluminum hi gear hub, straight cut planetaries, and the shrapnel was the teeth on the planets. Trans was pretty clean inside, the high gear clutches and the band looked pretty good, it was just the planetaries that failed. I don't know how many hundred runs this thing has on it, but it looks easy to fix and this could be considered long term routine maintenance. I'll be getting it to Leo shortly. I guess he moved from San Dimas to a new shop a bit further out. At least he didn't leave the state!!