Sluggish acceleration and won't go over 45mph - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70chevykidd · 05-24-2011, 11:19 PM

Okay so my tranny went out last month so i had it rebuilt with a shift kit and while I was there I figured why not go with a 3000 stall converter. Anyways, after I installed the tranny my truck is way slower and doesn't launch as hard as when it was stock. Any ideas?
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70chevykidd · 05-25-2011, 01:18 AM

Anybody? Lol
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**70cst** · 05-25-2011, 01:33 AM

Be patient...someone will chime in with an idea. Good Luck.

70chevykidd · 05-25-2011, 02:25 AM

Lol I am inpatient it makes me mad cause I want my power again.
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Beat68CST · 05-25-2011, 03:21 AM

Why would you put such a high stall converter in there?...

The poor thing is probably never locking up, you have to remember a converter is a big pump, if you don't spin the pump enough, you ain't makin stuff turn.

Change the converter.

70chevykidd · 05-25-2011, 04:26 AM

Well I figured since the cam makes power around 2500 I've heard to go about 5 to 8 hundred over for the tc.
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Beat68CST · 05-25-2011, 04:36 AM

Well bud, I know the converter goin in my truck is at like 1200-1500.

Just a good, old tow converter, pretty sure it's an Art Carr.

70chevykidd · 05-25-2011, 05:02 AM

I don't ever tow with her so I want a dd racetruck lol
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Longhorn Man · 05-25-2011, 06:18 AM

sounds like you went with too much converter. Go to one of the converter company's web sites and look for what they recomend. Some of them even have tech lines for this. They'll need to know the weight of the truck, tire size, gearing, engine displacement, compresson ratio and cam.
Your complaint is classic "over converter'd" complaint.
This is assuming you filled the trans all the way. (check running, warm and on level ground)

cdowns · 05-25-2011, 07:28 AM

maybe readup on the board rules concerning double posting next readup on torque converters

70chevykidd · 05-25-2011, 02:39 PM

Thanks guys. Y'all are the best!
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05-24-2011, 11:19 PM	#1
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Sluggish acceleration and won't go over 45mph Okay so my tranny went out last month so i had it rebuilt with a shift kit and while I was there I figured why not go with a 3000 stall converter. Anyways, after I installed the tranny my truck is way slower and doesn't launch as hard as when it was stock. Any ideas? Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime

05-25-2011, 01:18 AM	#2
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Re: Sluggish acceleration and won't go over 45mph Anybody? Lol Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime

05-25-2011, 01:33 AM	#3
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,373	Re: Sluggish acceleration and won't go over 45mph Be patient...someone will chime in with an idea. Good Luck. __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

05-25-2011, 02:25 AM	#4
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Re: Sluggish acceleration and won't go over 45mph Lol I am inpatient it makes me mad cause I want my power again. Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime

05-25-2011, 03:21 AM	#5
Beat68CST Registered User Join Date: Oct 2010 Location: Buckeye Arizona Posts: 470	Re: Sluggish acceleration and won't go over 45mph Why would you put such a high stall converter in there?... The poor thing is probably never locking up, you have to remember a converter is a big pump, if you don't spin the pump enough, you ain't makin stuff turn. Change the converter.

05-25-2011, 04:26 AM	#6
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Re: Sluggish acceleration and won't go over 45mph Well I figured since the cam makes power around 2500 I've heard to go about 5 to 8 hundred over for the tc. Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime

05-25-2011, 04:36 AM	#7
Beat68CST Registered User Join Date: Oct 2010 Location: Buckeye Arizona Posts: 470	Re: Sluggish acceleration and won't go over 45mph Well bud, I know the converter goin in my truck is at like 1200-1500. Just a good, old tow converter, pretty sure it's an Art Carr.

05-25-2011, 05:02 AM	#8
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Re: Sluggish acceleration and won't go over 45mph I don't ever tow with her so I want a dd racetruck lol Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime

05-25-2011, 06:18 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Sluggish acceleration and won't go over 45mph sounds like you went with too much converter. Go to one of the converter company's web sites and look for what they recomend. Some of them even have tech lines for this. They'll need to know the weight of the truck, tire size, gearing, engine displacement, compresson ratio and cam. Your complaint is classic "over converter'd" complaint. This is assuming you filled the trans all the way. (check running, warm and on level ground)

05-25-2011, 07:28 AM	#10
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Sluggish acceleration and won't go over 45mph maybe readup on the board rules concerning double posting next readup on torque converters __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY Last edited by cdowns; 05-25-2011 at 11:24 AM.

05-25-2011, 02:39 PM	#11
70chevykidd Registered User Join Date: Jan 2011 Location: Pueblo, Colorado Posts: 49	Re: Sluggish acceleration and won't go over 45mph Thanks guys. Y'all are the best! Posted via Mobile Device __________________ 70 c10 350 with headers, noisy gear drive, .450 lift cam and 4bbl carb w/TH400 hope to get a another Big Block in its lifetime



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