torque converter question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Greubin · 05-13-2006, 05:47 PM

Ok, I have a Bowtie OD 700R4 tranny and new engine. Bowtie says to unbolt an d push back the converter all the way into the tranny to break in new engine - before continuing with tranny setup. i've done that, trying to start the engine. Took a break, look at the converter and it looks like a conical bushing fell out of teh front of the torque converter? Is there a bushing on the front of the torque converter? I can't get the TQ to pull up to the flexplate. I am going to be seriously PO'ed if I have to pull this tranny out!!!

This has been a nightmare so far as it is....

TugOwar · 05-13-2006, 06:43 PM

err, there is no bushing on the front of the TC that i've ever seen.

is it a brass bushing you found? if the motor used to have a manual trans behind it, the crank shaft might still have the pilot bushing (brass) in the end of it. but even then i can't imagine it would fall out. they usually take some finese to remove.

lets wait and see what others have to say on the matter.

**truckdude239** · 05-13-2006, 07:25 PM

new engine an umm i've never unbolted the tc for engine break in haven't had any problems yet i've help put 5 or 6 motors in car with new trans. but there shouldn't be a bushing infront of the tc

TugOwar · 05-13-2006, 08:30 PM

i can imagine bowtie od would have you unbolt the tc and slide it back, maybe to protect their warrantee? dunno, just a guess.

if the tc is unbolted then you can concentrate on engine break in and not worry about trans fluid level, line pressure, fluid temp, etc.

corn · 05-13-2006, 10:19 PM

Never heard of that routine before. I wonder how many trannys they get back for front pump repairs after someone starts an engine for break-in & the ring gear snags the convertor that is sitting @1/4" away not hooked up. Sorry, no help on the bushing problem. Was the bushing small like it was a temporary plug to protect the end of the crank during installation?

**truckdude239** · 05-14-2006, 07:47 AM

try and et a picture of the bushing that will help us more to help you

Greubin · 05-14-2006, 02:27 PM

It's the front of the TC that I was seeing. I bolted the TC back to the flexplate, I just don't feel comfortable running the engine without the TC hooked up. Too little room for error.

Thanks for the replies!!

05-13-2006, 05:47 PM	#1
Greubin Registered User Join Date: Dec 2005 Location: SJC Posts: 158	torque converter question? Ok, I have a Bowtie OD 700R4 tranny and new engine. Bowtie says to unbolt an d push back the converter all the way into the tranny to break in new engine - before continuing with tranny setup. i've done that, trying to start the engine. Took a break, look at the converter and it looks like a conical bushing fell out of teh front of the torque converter? Is there a bushing on the front of the torque converter? I can't get the TQ to pull up to the flexplate. I am going to be seriously PO'ed if I have to pull this tranny out!!! This has been a nightmare so far as it is.... __________________ ___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI

05-13-2006, 06:43 PM	#2
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: torque converter question? err, there is no bushing on the front of the TC that i've ever seen. is it a brass bushing you found? if the motor used to have a manual trans behind it, the crank shaft might still have the pilot bushing (brass) in the end of it. but even then i can't imagine it would fall out. they usually take some finese to remove. lets wait and see what others have to say on the matter.

05-13-2006, 07:25 PM	#3
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: torque converter question? new engine an umm i've never unbolted the tc for engine break in haven't had any problems yet i've help put 5 or 6 motors in car with new trans. but there shouldn't be a bushing infront of the tc __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

05-13-2006, 08:30 PM	#4
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: torque converter question? i can imagine bowtie od would have you unbolt the tc and slide it back, maybe to protect their warrantee? dunno, just a guess. if the tc is unbolted then you can concentrate on engine break in and not worry about trans fluid level, line pressure, fluid temp, etc.

05-13-2006, 10:19 PM	#5
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: torque converter question? Never heard of that routine before. I wonder how many trannys they get back for front pump repairs after someone starts an engine for break-in & the ring gear snags the convertor that is sitting @1/4" away not hooked up. Sorry, no help on the bushing problem. Was the bushing small like it was a temporary plug to protect the end of the crank during installation?

05-14-2006, 07:47 AM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: torque converter question? try and et a picture of the bushing that will help us more to help you __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

05-14-2006, 02:27 PM	#7
Greubin Registered User Join Date: Dec 2005 Location: SJC Posts: 158	Re: torque converter question? It's the front of the TC that I was seeing. I bolted the TC back to the flexplate, I just don't feel comfortable running the engine without the TC hooked up. Too little room for error. Thanks for the replies!! __________________ ___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI

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