Powerglide Woes

reknapp52 · 02-21-2022, 10:59 AM

I ordered a new trans in December, it arrived at my house the day after I left for the Winternationals. While running in Pomona, my old trans has developed an issue where it struggles to back up, almost like another gear is applied. Everything else seems to work normally (1st gear, 2nd, trans brake, TB release) Now in Phoenix, would like to get it working right before this next event. Any ideas on what to look at first? Thanks--

Tom Goldman · 02-21-2022, 03:01 PM

I've seen broken reverse pressure plates cause a complaint like yours.
The rear clutches still apply but the broken plate pushes forward against the planetary causing it to drag hard.
The trans brake will still apply and release because the planetary is stationary although it usually is inconstant .
Hard to tell without disassembly .

reknapp52 · 02-21-2022, 03:27 PM

Could that be a problem that only shows up part-time? At times my car seems to back up normally.

reknapp52 · 02-21-2022, 05:00 PM

Dropped the pan--some debris in the bottom, rubbery, maybe lip seal material. Be pulling the transmission this afternoon.

02-21-2022, 10:59 AM	#1
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Powerglide Woes I ordered a new trans in December, it arrived at my house the day after I left for the Winternationals. While running in Pomona, my old trans has developed an issue where it struggles to back up, almost like another gear is applied. Everything else seems to work normally (1st gear, 2nd, trans brake, TB release) Now in Phoenix, would like to get it working right before this next event. Any ideas on what to look at first? Thanks--

02-21-2022, 03:01 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,454 Likes: 823 Liked 776 Times in 221 Posts	Re: Powerglide Woes I've seen broken reverse pressure plates cause a complaint like yours. The rear clutches still apply but the broken plate pushes forward against the planetary causing it to drag hard. The trans brake will still apply and release because the planetary is stationary although it usually is inconstant . Hard to tell without disassembly . __________________ Tom Goldman 1500 SG , 1506 STK

02-21-2022, 03:27 PM	#3
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Re: Powerglide Woes Could that be a problem that only shows up part-time? At times my car seems to back up normally.

02-21-2022, 05:00 PM	#4
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Re: Powerglide Woes Dropped the pan--some debris in the bottom, rubbery, maybe lip seal material. Be pulling the transmission this afternoon.