TH350 shifting question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigjimzlll · 05-22-2002, 08:57 PM

I assume this is the right forum to post this..how do you make the tranny shift latter in the rpms...i installed a adjustable vacuum can, havent played with it yet....if i disconnect the vacuum line it dosent really effect the shifting to much, so I cant see what adjusting the can will do...is their something else that controls the shift points?...is it easy to tweak?..thanks

69 longhorn · 05-22-2002, 09:06 PM

The easiest way is to recurve the govenor. B&M puts out a kit for about $50,should be available through summit or Jegs. I went through that when i dropped the 4.10s in the longhorn. Good luck..........69

Longhorn Man · 05-22-2002, 09:31 PM

Seems odd that unhooking the vac to the modulater doesn't do too much. It should rev to about 45 MPH (depending on your rear gears) when that line comes off.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
E-mail longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio

bigjimzlll · 05-22-2002, 09:36 PM

it shifts at 4000 rpm wot connected and about 4500 disconnected....shifts real firm when its in drive, but kinda mushy when i manually shift from first to second,,,the second third shift is hard both ways..its supposed to have kevlar clutches and some trick stuff, but...i dont know..getting ready to stick the new 355 in hopefully this weekend, i have the short block together

..the machine shop did a wonderful job..main studs and new rods and bolts.... Im so jazzed

05-22-2002, 08:57 PM	#1
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	TH350 shifting question I assume this is the right forum to post this..how do you make the tranny shift latter in the rpms...i installed a adjustable vacuum can, havent played with it yet....if i disconnect the vacuum line it dosent really effect the shifting to much, so I cant see what adjusting the can will do...is their something else that controls the shift points?...is it easy to tweak?..thanks __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

05-22-2002, 09:06 PM	#2
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	The easiest way is to recurve the govenor. B&M puts out a kit for about $50,should be available through summit or Jegs. I went through that when i dropped the 4.10s in the longhorn. Good luck..........69 __________________ http://community.webshots.com/user/hotrodhorn

05-22-2002, 09:36 PM	#4
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	it shifts at 4000 rpm wot connected and about 4500 disconnected....shifts real firm when its in drive, but kinda mushy when i manually shift from first to second,,,the second third shift is hard both ways..its supposed to have kevlar clutches and some trick stuff, but...i dont know..getting ready to stick the new 355 in hopefully this weekend, i have the short block together ..the machine shop did a wonderful job..main studs and new rods and bolts.... Im so jazzed __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

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05-22-2002, 09:31 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Seems odd that unhooking the vac to the modulater doesn't do too much. It should rev to about 45 MPH (depending on your rear gears) when that line comes off. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. E-mail longhornmail@yahoo.com My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough? Columbus Ohio



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