Powerglide Thread Size

reknapp52 · 12-29-2021, 02:08 PM

I have a new Ultra-Case trans ordered from JW Performance. They are closed for the holidays so I can't get any info from them. I am wondering what thread size they use where cooler lines are plumbed in. Stock PG has 1/8 NPT which adapts nicely to -4 AN fittings. Most trans coolers I've looked at, and the one I purchased, have -6 fittings, which typically are mated to a 1/4 NPT. Any help is appreciated--thanks!

Craig Porter · 12-29-2021, 06:11 PM

Most aftermarket P/G cases have 1/4 npt and use-6 coolant lines. If you want to use your -4 fittings you could use a brass step down adapter.Hope this helps

reknapp52 · 12-30-2021, 01:45 AM

Thanks Craig, I was really hoping to avoid using adapters. My new cooler has -6 fittings.

voltdr · 01-02-2022, 11:52 PM

No matter what….-4 fittings are too small for cooler flow.
Dan

reknapp52 · 01-05-2022, 06:23 PM

voltdr, that's good to know--could be part of my temp issues.

nomad · 03-13-2022, 12:21 AM

Speaking of JW Transmissions. Scott Fifield, a 10.90 racer just went to work for them in sales.

12-29-2021, 02:08 PM	#1
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Powerglide Thread Size I have a new Ultra-Case trans ordered from JW Performance. They are closed for the holidays so I can't get any info from them. I am wondering what thread size they use where cooler lines are plumbed in. Stock PG has 1/8 NPT which adapts nicely to -4 AN fittings. Most trans coolers I've looked at, and the one I purchased, have -6 fittings, which typically are mated to a 1/4 NPT. Any help is appreciated--thanks!

12-29-2021, 06:11 PM	#2
Craig Porter Junior Member Join Date: May 2021 Posts: 44 Likes: 0 Liked 83 Times in 24 Posts	Re: Powerglide Thread Size Most aftermarket P/G cases have 1/4 npt and use-6 coolant lines. If you want to use your -4 fittings you could use a brass step down adapter.Hope this helps

12-30-2021, 01:45 AM	#3
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Re: Powerglide Thread Size Thanks Craig, I was really hoping to avoid using adapters. My new cooler has -6 fittings.

01-02-2022, 11:52 PM	#4
voltdr Senior Member Join Date: Jan 2008 Location: Texas Posts: 704 Likes: 77 Liked 92 Times in 49 Posts	Re: Powerglide Thread Size No matter what….-4 fittings are too small for cooler flow. Dan __________________ Dan Foley SC 4698

01-05-2022, 06:23 PM	#5
reknapp52 Junior Member Join Date: Nov 2008 Location: Cascade, CO Posts: 48 Likes: 22 Liked 7 Times in 5 Posts	Re: Powerglide Thread Size voltdr, that's good to know--could be part of my temp issues.

03-13-2022, 12:21 AM	#6
nomad Junior Member Join Date: Oct 2013 Posts: 46 Likes: 5 Liked 6 Times in 3 Posts	Re: Powerglide Thread Size Speaking of JW Transmissions. Scott Fifield, a 10.90 racer just went to work for them in sales.