Turbo 400- wants to go and not stop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hellbent · 04-05-2010, 08:53 AM

Hey guys, hope someone might be able to help me out with a question. I had my Turbo 400 installed last week and it shifts and drives good. It seems that when it gets hot (after I drive is 10 minutes or so) and stop, it wants to continue to pull. I have to nearly stand on the brake to keep it still. Then when I park and shift to reverse and then drive, it snatches pretty hard. This only happens when its hot. It goes into gear smooth when it's cold (no snatch or lunge)... What do ya'll think is the issue here? It has a brand new torque converter.

midevil1 · 04-05-2010, 10:33 AM

Forward clutches set to tight. Could also be in the V-body or the converter. When the forward clutches are to tight or starting to weld together it will become one with the crankshaft. In otherwords, it is slightly engaged all the time. What kinda fluid you running in it? Did it come with a warranty?

Hellbent · 04-05-2010, 11:54 AM

I think it's dextron 2? Nope- no warranty i got the tranny through a barter and paid a friend to install it. Thanks for the info, I guess I need to take it to a shop...

**mr48chev** · 04-05-2010, 12:30 PM

What's your idle speed? If it is too high the engine will over run the stall speed of the converter and want to keep pulling against the trans at a stop and do the bang into gear thing.

This will happen if you have a hot cam in the engine and the converter has a real low stall speed. Or if the idle is adjusted up to keep the engine running for some reason or another.

Hellbent · 04-06-2010, 08:56 AM

Quote:

Originally Posted by mr48chev

What's your idle speed? If it is too high the engine will over run the stall speed of the converter and want to keep pulling against the trans at a stop and do the bang into gear thing.

This will happen if you have a hot cam in the engine and the converter has a real low stall speed. Or if the idle is adjusted up to keep the engine running for some reason or another.

I'm going to play with adjusting the idle this weekend. Hopefully, I can work it out.
However, I think you have given me the answer... It's the hot cam and OE converter. I know nothing about the cam in this thing, other than it isn't stock-It definatley has a chop to it.

04-05-2010, 08:53 AM	#1
Hellbent Don't blame the messenger Join Date: Nov 2009 Location: Summerville, SC Posts: 318	Turbo 400- wants to go and not stop Hey guys, hope someone might be able to help me out with a question. I had my Turbo 400 installed last week and it shifts and drives good. It seems that when it gets hot (after I drive is 10 minutes or so) and stop, it wants to continue to pull. I have to nearly stand on the brake to keep it still. Then when I park and shift to reverse and then drive, it snatches pretty hard. This only happens when its hot. It goes into gear smooth when it's cold (no snatch or lunge)... What do ya'll think is the issue here? It has a brand new torque converter. __________________ On the Level Just a guy with a hammer and a grinder. OH!, and an HOA- enough said...: http://67-72chevytrucks.com/vboard/s...d.php?t=372525 "Some drink from the fountain of knowledge while others just gargle."

04-05-2010, 10:33 AM	#2
midevil1 ShortBus KingPin Join Date: Feb 2010 Location: houston texas Posts: 146	Re: Turbo 400- wants to go and not stop Forward clutches set to tight. Could also be in the V-body or the converter. When the forward clutches are to tight or starting to weld together it will become one with the crankshaft. In otherwords, it is slightly engaged all the time. What kinda fluid you running in it? Did it come with a warranty? __________________ 67 shortstep prosteet. 505 BBC, FULL BILLET TH350, Owner built EVERYTHING.... (My RIDE) 2008 GMC Yukon DENALI, 425 AWHP, 5700LBS, 12.40's at 109mph. (Her RIDE) 2006 Kawasaki Brute Force, 916cc, 80 shot, 6.20's at 111 mph. (Her RIDE)

04-05-2010, 11:54 AM	#3
Hellbent Don't blame the messenger Join Date: Nov 2009 Location: Summerville, SC Posts: 318	Re: Turbo 400- wants to go and not stop I think it's dextron 2? Nope- no warranty i got the tranny through a barter and paid a friend to install it. Thanks for the info, I guess I need to take it to a shop... __________________ On the Level Just a guy with a hammer and a grinder. OH!, and an HOA- enough said...: http://67-72chevytrucks.com/vboard/s...d.php?t=372525 "Some drink from the fountain of knowledge while others just gargle."

04-05-2010, 12:30 PM	#4
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,509	Re: Turbo 400- wants to go and not stop What's your idle speed? If it is too high the engine will over run the stall speed of the converter and want to keep pulling against the trans at a stop and do the bang into gear thing. This will happen if you have a hot cam in the engine and the converter has a real low stall speed. Or if the idle is adjusted up to keep the engine running for some reason or another.



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