Torque Converter or Transmission? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fosheec · 02-20-2007, 12:58 PM

Got my stock 402 back in the 72 and running beautifully this weekend. One problem: When I put it in gear (forward or reverse) I get nothing when I jump on the gas. If I rev it to 3000 it'll move a little. I already checked to make sure my TC was engaged. I actually had to pull it back out about 1/4" to bolt it to the flexplate. Also, I pulled the driveshaft and would rev the engine to see if the output shaft would spin. It only budges if I rev it to 3000as well. Do I need a new torque converter or is it something else?

Info: The TC is stock (yes, 35 years old). Running a TH400.

fastwillie 696969 · 02-20-2007, 01:06 PM

i would say the tc is burntout smell the tranny fluild

fosheec · 02-20-2007, 01:41 PM

ttt

**Palf70Step** · 02-20-2007, 01:46 PM

I'd say you have more than a convertor problem. If this is the original tranny, it (as well as the torque convertor) is probably in need of a good rebuild/replacement of internals.

OLDROCK&ROLLER · 02-20-2007, 01:51 PM

couple ???'s

Did it work before you removed the engine?
Did you do any work to it while the engine was out?
Have you make sure the fluid level is correct?
Sounds like the fluid level is low to me.

**slomotion** · 02-20-2007, 01:51 PM

Are you certain that the TC engaged the trans correctly? If it didn't seat you may not be driving the trans pump.

fosheec · 02-20-2007, 01:56 PM

Yeah, it was seated correctly.

It is the original tranny and probably does need a little TLC, but I was hoping to not have to mess with it at this point.

It worked correctly before pulled. The only real complaint I had was when putting it into gear you would hear a nice thud and the whole truck would shudder.

I just filled the thing with fluid, but I suppose I could put more in (I haven't gotten the tranny up to operating temp because of this whole problem).

Thanks for the help guys, keep it coming.

fosheec · 02-20-2007, 01:58 PM

Although, low fluid level may be the problem, the more I think about it. I dropped the tranny back down and didn't have the expected fountain pouring out of the tailhousing.

hvychve · 02-20-2007, 02:09 PM

Just a thought , but I am guilty of this delemna, I installed a transaxle into a ford windstar and the torque converter had slid out a tad and than when I bolted and tightend up the bellhousing bolts the converter was not engaged into the front pump, so tightening trany to eng. I damaged the front pump, I than had to remove the tranny and replace the pump, just a thought with out knowing all else involved, maybe the pump got damaged in the same way , justa guess. good luck

fosheec · 02-20-2007, 03:15 PM

ttt

1968SWBBigBlock · 02-20-2007, 05:01 PM

What about shifter linkage? is it adjsuted correctly? I know it sounds like a long shot but a double check may save you from dropping the tranny.

meathead95 · 02-20-2007, 05:29 PM

sounds like it is low on fluid to me

02-20-2007, 12:58 PM	#1
fosheec Registered User Join Date: Oct 2006 Location: Cedarville, OH Posts: 61	Torque Converter or Transmission? Got my stock 402 back in the 72 and running beautifully this weekend. One problem: When I put it in gear (forward or reverse) I get nothing when I jump on the gas. If I rev it to 3000 it'll move a little. I already checked to make sure my TC was engaged. I actually had to pull it back out about 1/4" to bolt it to the flexplate. Also, I pulled the driveshaft and would rev the engine to see if the output shaft would spin. It only budges if I rev it to 3000as well. Do I need a new torque converter or is it something else? Info: The TC is stock (yes, 35 years old). Running a TH400. __________________ Caleb

02-20-2007, 01:06 PM	#2
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: Torque Converter or Transmission? i would say the tc is burntout smell the tranny fluild __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

02-20-2007, 01:41 PM	#3
fosheec Registered User Join Date: Oct 2006 Location: Cedarville, OH Posts: 61	Re: Torque Converter or Transmission? ttt __________________ Caleb

02-20-2007, 01:46 PM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,251	Re: Torque Converter or Transmission? I'd say you have more than a convertor problem. If this is the original tranny, it (as well as the torque convertor) is probably in need of a good rebuild/replacement of internals. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

02-20-2007, 01:51 PM	#5
OLDROCK&ROLLER Registered User Join Date: Feb 2004 Location: WHITEVILLE N.C. Posts: 494	Re: Torque Converter or Transmission? couple ???'s Did it work before you removed the engine? Did you do any work to it while the engine was out? Have you make sure the fluid level is correct? Sounds like the fluid level is low to me. __________________ 72 CHEYENNE 10 SUPER 468/400/3.73

02-20-2007, 01:51 PM	#6
slomotion Old Duffer Join Date: Mar 2003 Location: Maine Posts: 1,822	Re: Torque Converter or Transmission? Are you certain that the TC engaged the trans correctly? If it didn't seat you may not be driving the trans pump. __________________ '68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve."

02-20-2007, 01:56 PM	#7
fosheec Registered User Join Date: Oct 2006 Location: Cedarville, OH Posts: 61	Re: Torque Converter or Transmission? Yeah, it was seated correctly. It is the original tranny and probably does need a little TLC, but I was hoping to not have to mess with it at this point. It worked correctly before pulled. The only real complaint I had was when putting it into gear you would hear a nice thud and the whole truck would shudder. I just filled the thing with fluid, but I suppose I could put more in (I haven't gotten the tranny up to operating temp because of this whole problem). Thanks for the help guys, keep it coming. __________________ Caleb

02-20-2007, 01:58 PM	#8
fosheec Registered User Join Date: Oct 2006 Location: Cedarville, OH Posts: 61	Re: Torque Converter or Transmission? Although, low fluid level may be the problem, the more I think about it. I dropped the tranny back down and didn't have the expected fountain pouring out of the tailhousing. __________________ Caleb

02-20-2007, 02:09 PM	#9
hvychve To The Levy Join Date: Jan 2007 Location: california Posts: 391	Re: Torque Converter or Transmission? Just a thought , but I am guilty of this delemna, I installed a transaxle into a ford windstar and the torque converter had slid out a tad and than when I bolted and tightend up the bellhousing bolts the converter was not engaged into the front pump, so tightening trany to eng. I damaged the front pump, I than had to remove the tranny and replace the pump, just a thought with out knowing all else involved, maybe the pump got damaged in the same way , justa guess. good luck

02-20-2007, 03:15 PM	#10
fosheec Registered User Join Date: Oct 2006 Location: Cedarville, OH Posts: 61	Re: Torque Converter or Transmission? ttt __________________ Caleb

02-20-2007, 05:01 PM	#11
1968SWBBigBlock Active Member Join Date: Oct 2006 Location: Ohio Posts: 1,643	Re: Torque Converter or Transmission? What about shifter linkage? is it adjsuted correctly? I know it sounds like a long shot but a double check may save you from dropping the tranny. __________________ 1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles 18.5" x 31" Hoosier Pro Street Radials ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree

02-20-2007, 05:29 PM	#12
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,440	Re: Torque Converter or Transmission? sounds like it is low on fluid to me __________________ 72 2wd blazer 72 swb 4x4



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