Powerglide Problem - Please Help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ubtripn · 03-06-2011, 02:56 PM

I have a Powerglide on my 68 behind my 350 until I can afford a 700R4. Anyway, it shifts into 2nd way early and also does not kickdown when I want to pass someone. In addition, there is no vacuum line attached to my carb from the tranny. I have been researching the issue but am confused. Do they all use a vacuum line? Do they all have governers. How do I adjust the detent rod I keep reading about. All of the articles say at the carb but I cannot find where it connects. Can someobody please help educate me? Thanks.

JimKshortstep4x4 · 03-06-2011, 08:03 PM

Here is the procedure. I have more detailed information that I can e-mail you, (it is too large to post).

Jim

**rbagley** · 03-06-2011, 09:41 PM

Quote:

Originally Posted by ubtripn

In addition, there is no vacuum line attached to my carb from the tranny.

This might not help much, but the vacuum line from the transmission can be hooked up to the intake manifold rather than the carb. That's all I know

richards72chevy · 03-06-2011, 11:13 PM

I would go to a wrecking yard and get some old transmission cooler lines cut off the flared ends go to your local auto parts store and buy some rubber line and hook it up to your carb or intake.I cant remember wich one it plugs into.I lost my original line on my impala and i did this its held up for a long time.Make shure its an aliminum line they are easier to bend.

richards72chevy · 03-06-2011, 11:15 PM

Im not for shure what you mean by governor.Do you mean the vacuum modulator?

ubtripn · 03-07-2011, 09:28 AM

Thanks for all the info Richard72 and RBagley, what does the vaccumm line from the tranny to the intake manifold do? I can put it in low and it will stay that way into higher rpms and shift. Just no kickdown and it shifts early if I don't manualyy walk it up..

Thanks JumkShortep - Is that in the Chasssis Mauals we see on Ebay, if so I wil look it up. I will let you know if i need you to email me that and thanks. Will the fact I have an Edlebrock make a huge difference because there is some linkage difference?

Thanks RBageky - I didn't even think of that and will do it.

Thanks Richard 72 - I metal tubing will be WAY better, I'm goona do it.

Thanks everyone. For around town is seems like a Powerglide is ok but I need better gas mileage, power and the ability to not be the head of parades on highways.

03-06-2011, 02:56 PM	#1
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	Powerglide Problem - Please Help! I have a Powerglide on my 68 behind my 350 until I can afford a 700R4. Anyway, it shifts into 2nd way early and also does not kickdown when I want to pass someone. In addition, there is no vacuum line attached to my carb from the tranny. I have been researching the issue but am confused. Do they all use a vacuum line? Do they all have governers. How do I adjust the detent rod I keep reading about. All of the articles say at the carb but I cannot find where it connects. Can someobody please help educate me? Thanks. Last edited by ubtripn; 03-07-2011 at 10:07 AM.

03-06-2011, 08:03 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Powerglide Problem - Please Help! Here is the procedure. I have more detailed information that I can e-mail you, (it is too large to post). Jim Attached Images __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

03-06-2011, 11:13 PM	#4
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,651	Re: Powerglide Problem - Please Help! I would go to a wrecking yard and get some old transmission cooler lines cut off the flared ends go to your local auto parts store and buy some rubber line and hook it up to your carb or intake.I cant remember wich one it plugs into.I lost my original line on my impala and i did this its held up for a long time.Make shure its an aliminum line they are easier to bend.

03-06-2011, 11:15 PM	#5
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,651	Re: Powerglide Problem - Please Help! Im not for shure what you mean by governor.Do you mean the vacuum modulator?

03-07-2011, 09:28 AM	#6
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	Re: Powerglide Problem - Please Help! Thanks for all the info Richard72 and RBagley, what does the vaccumm line from the tranny to the intake manifold do? I can put it in low and it will stay that way into higher rpms and shift. Just no kickdown and it shifts early if I don't manualyy walk it up.. Thanks JumkShortep - Is that in the Chasssis Mauals we see on Ebay, if so I wil look it up. I will let you know if i need you to email me that and thanks. Will the fact I have an Edlebrock make a huge difference because there is some linkage difference? Thanks RBageky - I didn't even think of that and will do it. Thanks Richard 72 - I metal tubing will be WAY better, I'm goona do it. Thanks everyone. For around town is seems like a Powerglide is ok but I need better gas mileage, power and the ability to not be the head of parades on highways. Last edited by ubtripn; 03-07-2011 at 10:09 AM.



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