th400 question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

doughby82 · 03-25-2002, 02:22 AM

is there spacers that go between the torq convertor and the flywheel,i just installed the tranny and there seems to be about 1/4 inch or more space between them after i tighten the bolts

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springfield illinois
1982 shovelhead
1967 c10
http://community.webshots.com/scripts/editPhotos.fcgi?action=viewall&albumID=27441460

O'l Buck · 03-25-2002, 04:20 AM

no spacers that i know of, are your bolts bottoming out on the converter?? you definitely don't want any slack beween the torque converter and the flywheel, I've pulled about 10 of those things and never seen any spacers yet.1/4" is alot of clearance, not much less than when the converter is all the way in the tranny. try shorter bolts and make sure your bell housing is tight to the block.

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'72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

67 Cutlass convertible
330, 3spd stick

90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

*Fast68Chevy* · 03-25-2002, 10:44 AM

ive run into this problem too, but on th350, i just uused washers ot take up all the gap between the plate and verter, also there are two styles of verters, one has bolts that thread directly into the verter and then theres the more cvommon nut and bolt style

the bolt only style has big lugs that protrude off the verter and look like they would take up the room of the gap between it and the plate. some applications used them, i have one or two of those dtyle verters here,the 425 79 caddy th400 used it, but the 72 455 th400 car didnt, it used the flat nut and bolt style flange verter, so...

hmm..

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-71/C-10(thx teeitup and crews!)350 4+4/CH465(thx 71Chev, GMCPaul, and CPNE)longfleet bed(thnx meathead95)!still building it-
-'84 Z28(Z28) 1G1AP87GXEL100000 with H.O. 305/4bbl/190net/hp(L69) 3.73 rear(GT4/YC4) 700R4(MD8-MXO) & other goodies

-79 G20 pass van, 350/th350/10bolt,
paint is overrated
Randy- Lincoln, IL

r68c30@hotmail.com
© RSS Enterprises 2000

71GMCstreet · 03-25-2002, 01:43 PM

In some cases, you will have about 1/4 in "play" in the converter where is bolts up to the flywheel, unless your flywheel is on backwards. Some of these tranny input shafts/or converter shafts were machined a tick longer/shorter depending on where they came from.

*Fast68Chevy* · 03-25-2002, 02:06 PM

sound slike bad quality control to me,,.

doughby82 · 03-25-2002, 02:41 PM

so i should use a spacer between them,the tranny is tight against the the motor,the verter is thread in,

71GMCstreet · 03-25-2002, 07:54 PM

Naw....sorry so long for a return post, I've had play in mine since I put it together, no problems, I guess you could space it up for your comfort zone though, should'nt hurt anything either way.

Duallie · 03-26-2002, 12:27 AM

If the engine used to be for a manual transmission, there may still be a pilot bearing in the back of the crankshaft still. That would cause the converter to not fully seat in the crank and give you the gap. Something is wrong.

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Just as if I knew what I was doin'

69 longhorn · 03-26-2002, 12:37 AM

You should have 3/16-1/4" floating clearance between the converter& flex plate.....before its bolted up. The conveter should slide up to sit flush against the flexplate when you bolt it up.....or you have troubles. 69 longhorn.

doughby82 · 03-26-2002, 02:27 AM

i just removed a th350 from it so it wasnt a stickshift before

------------------
springfield illinois
1982 shovelhead
1967 c10
http://community.webshots.com/scripts/editPhotos.fcgi?action=viewall&albumID=27441460

03-25-2002, 02:22 AM	#1
doughby82 Registered User Join Date: Mar 2001 Location: springfield ill Posts: 836	th400 question is there spacers that go between the torq convertor and the flywheel,i just installed the tranny and there seems to be about 1/4 inch or more space between them after i tighten the bolts ------------------ springfield illinois 1982 shovelhead 1967 c10 http://community.webshots.com/scripts/editPhotos.fcgi?action=viewall&albumID=27441460 __________________ springfield illinois 2003 custom (harley)built from scratch 68 swb

03-25-2002, 04:20 AM	#2
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	no spacers that i know of, are your bolts bottoming out on the converter?? you definitely don't want any slack beween the torque converter and the flywheel, I've pulled about 10 of those things and never seen any spacers yet.1/4" is alot of clearance, not much less than when the converter is all the way in the tranny. try shorter bolts and make sure your bell housing is tight to the block. ------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

03-25-2002, 02:41 PM	#6
doughby82 Registered User Join Date: Mar 2001 Location: springfield ill Posts: 836	so i should use a spacer between them,the tranny is tight against the the motor,the verter is thread in, __________________ springfield illinois 2003 custom (harley)built from scratch 68 swb

03-26-2002, 12:27 AM	#8
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	If the engine used to be for a manual transmission, there may still be a pilot bearing in the back of the crankshaft still. That would cause the converter to not fully seat in the crank and give you the gap. Something is wrong. ------------------ Just as if I knew what I was doin' __________________ Just as if I knew what I was doin'

03-26-2002, 12:37 AM	#9
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	You should have 3/16-1/4" floating clearance between the converter& flex plate.....before its bolted up. The conveter should slide up to sit flush against the flexplate when you bolt it up.....or you have troubles. 69 longhorn. __________________ http://community.webshots.com/user/hotrodhorn

03-25-2002, 10:44 AM	#3
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	ive run into this problem too, but on th350, i just uused washers ot take up all the gap between the plate and verter, also there are two styles of verters, one has bolts that thread directly into the verter and then theres the more cvommon nut and bolt style the bolt only style has big lugs that protrude off the verter and look like they would take up the room of the gap between it and the plate. some applications used them, i have one or two of those dtyle verters here,the 425 79 caddy th400 used it, but the 72 455 th400 car didnt, it used the flat nut and bolt style flange verter, so... hmm.. ------------------ -71/C-10(thx teeitup and crews!)350 4+4/CH465(thx 71Chev, GMCPaul, and CPNE)longfleet bed(thnx meathead95)!still building it- -'84 Z28(Z28) 1G1AP87GXEL100000 with H.O. 305/4bbl/190net/hp(L69) 3.73 rear(GT4/YC4) 700R4(MD8-MXO) & other goodies -79 G20 pass van, 350/th350/10bolt, paint is overrated Randy- Lincoln, IL r68c30@hotmail.com © RSS Enterprises 2000

03-25-2002, 01:43 PM	#4
71GMCstreet Registered User Join Date: Dec 2001 Posts: 97	In some cases, you will have about 1/4 in "play" in the converter where is bolts up to the flywheel, unless your flywheel is on backwards. Some of these tranny input shafts/or converter shafts were machined a tick longer/shorter depending on where they came from.

03-25-2002, 02:06 PM	#5
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	sound slike bad quality control to me,,.

03-25-2002, 07:54 PM	#7
71GMCstreet Registered User Join Date: Dec 2001 Posts: 97	Naw....sorry so long for a return post, I've had play in mine since I put it together, no problems, I guess you could space it up for your comfort zone though, should'nt hurt anything either way.

03-26-2002, 02:27 AM	#10
doughby82 Registered User Join Date: Mar 2001 Location: springfield ill Posts: 836	i just removed a th350 from it so it wasnt a stickshift before ------------------ springfield illinois 1982 shovelhead 1967 c10 http://community.webshots.com/scripts/editPhotos.fcgi?action=viewall&albumID=27441460 __________________ springfield illinois 2003 custom (harley)built from scratch 68 swb



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