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#1 |
Registered User
Join Date: Dec 2001
Location: West Unity, OH, USA
Posts: 235
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Eng. Stalls When I Drop into drive .
I Idle at about 800 Rpm With a 272 Dur. Crain cam in a 275 Hp 327 , 700R4 . the problem is when I put it in gear , it lurches forword & the Rpms drop to stall range ? Any Ideas & ways to solve the problem?
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#2 |
student wrench turner
Join Date: Jan 2003
Location: wrightstown, wisconsin
Posts: 192
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im not sure but you might need a stall convertor
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1969 Chevy C-10 with 250 L6 2002 GMC Sierra 2500 HD Duramax with banks six gun |
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#3 |
Inline 69
Join Date: Apr 2003
Location: valleysprings,california
Posts: 1,018
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i was gonna say that also,,,,,,,did you just mate this motor and tranny? i remember some seeing something about cam size,and matching torque convertor to it,,,,,,,,,jeff
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#4 |
Registered User
Join Date: Oct 2002
Location: S.W. Michigan
Posts: 403
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7 grand wholeshot???
![]() Is the exhaust plugged? I had a friend ![]() |
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#5 |
Registered User
Join Date: Dec 2001
Location: West Unity, OH, USA
Posts: 235
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I'm running the stock Converter on it . I was thinking that might be the problem. but not sure?
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#6 |
GEARHEAD
Join Date: Aug 2003
Location: MN
Posts: 6,122
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When I went from a manual tranny to the automatic, I ended up replacing the cam. I had a Crane Blazer cam in it, I think it had about 272 duration and had a good loping idle that I loved. But, after I put the TH350 in, I had to set the idle up to almost 1600 so it wouldn't kill at every stop. I could have replaced the torque converter, but I recammed it to a milder profile and put in rhodes lifters. It runs great and I still have pretty good mid range and top end power, but dam I miss that loping idle.
HG ![]()
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If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 ![]() 72 ![]() HG's Plow Truck '78 ![]() Bigass Farm Truck HG's thread of miscellaneous stuff |
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#7 |
Registered User
Join Date: Dec 2001
Location: West Unity, OH, USA
Posts: 235
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that sounds about the same as mine , I like the cam to . Nice sound . That might be the best way to go . jest cant drive it like this!
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#8 |
Registered User
Join Date: May 2002
Location: Oakley, Ca. USA
Posts: 137
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Try setting the idle higher (approx 1000 - 1200 rpm), then drop it into gear. At this point lower RPM down, if you need to to get a decent idle when it's in gear. Make sure you block the wheels, and parking brake is on when you do this. You'll have to open and close the throttle a couple of times to get it to settle in.
With the higher duration camshaft, you probably wont be able to maintain the stock idle settings.... Rudy
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Rudy Fierros '95 Honda VFR750F Used to have a '71 Chevy Stepside, Guards Red, Lowered 4" rear, 3" front, White Oak bed wood, 700R4 w/373 gears until some low life stole it! |
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#9 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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with that big of a cam you have to run a stall verter or the thing will never run right. because if you do idle it up higher you gonna have trouble just sitting at a light because the truck is gonna want to keep jumping forward. go get yourself a tci 2500 stall convertor they run about 250 bucks and you problem will be gone
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#10 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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As a general rule anything above 270 duration has to have a stall converter. You need to check out what gear you have because if you run a stall coverter with "highway" gears the converter will never get out of it's stall range and burn up in no time...but will do some impessive burnouts at any speed. [Don't ask me how I know that...lol]
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#11 |
Registered User
Join Date: Dec 2001
Location: West Unity, OH, USA
Posts: 235
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Tom . I'm Running a 373 Posi , Would a 2500 Stall speed be about right . & your rite about the burnouts .Jest got to love it. Thanks Paul
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#12 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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I would call all the major converter manufacturers and tell them your motor specs,trans,gears etc and let them tell you what would be best for you application.
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#13 |
Inline 69
Join Date: Apr 2003
Location: valleysprings,california
Posts: 1,018
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http://www.smokemup.com/tech/700r4.php
check out this site it might help,its all about the 700r4............jeff |
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#14 |
Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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Check the vacuum at idle if it is low and steady look for timng/vacuum leaks if it is real bouncy its the cam and you can take the idle up to about 850 in drive more than that you start to burn things in the trany at idle. You could have an open port or cracked vacuum line and cause the same condition. just a thought.
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