This is going to be fun. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

magnethead · 05-23-2007, 10:09 PM

well, i've noticed occasionally that my truck would leave a little fluid trail. I thought it was just antifreeze since my radiator has a leak. Then today i notice that there's basically a flood of fluid.

4 hours later, my dad and I deem it's a front pump seal. sO with the truck on ramps and a chip seal driveway, I get to drop the T400 and the 10 feet (or whatever a crew cab LWB driveshaft measures to) of driveshaft, with only a floor jack.

The hard part is finding wheel chocks since the E-brake doesn't work worth a quarter of a penny.

And tips that my dad might not reveal to me?

71swb4x4 · 05-23-2007, 10:41 PM

The only tip I can give, think safety, safety, safety. Make sure that big truck doesn't fall on you.

bb1979 · 05-24-2007, 05:25 AM

I've been there done that with the jack did it once and vowed never again. If you haven't already started take the motor and tranny out together through the top its just way to hard from underneath unless you have a tranny shop.

Texas Lefty · 05-24-2007, 07:47 AM

I have done the same repiar several times th400 in a c30 I could probably help you, possibly even find you a trans jack let me know if you still need help

piecesparts · 05-24-2007, 07:50 AM

That is why I own a two post lift. I don't have to crawl around under a shde tree NO MO.

wedgemon · 05-24-2007, 11:19 AM

MMMMmmm, 2 post lift....

magnethead · 05-24-2007, 05:28 PM

well, we have the back tires in the air now and I have the convertor and starter unbolted and ready for the back segment of the DS to come off.

Something that caught my dad by surprise- a 5 bolt flexplate and a fixed yoke. Are these part of the camper special package with the 4.10's and factory engine oil cooler? My dad said all the 400's he's had in his full bodies and camaro's were all 3 bolt slip yokes.

lurch115 · 05-24-2007, 06:54 PM

hey, just a little tip for ya....you can turn your floor jack into a tranny jack really easy....find an old fly wheel, (i made mine with a flywheel from a 6.2 diesel) and then find a pin that will fit in the same hole that the jack pad is already in.....then weld that pin into the center hole on the flywheel...(you might have to make the center hole a little bigger so that the pin can fit through it because you'll want it welded on both sides of the flywheel) and then after doing that find a short chain (about 2.5 or so feet long) and bolt it to one of the holes for the torque converter....and there ya go....i've used mine for years and on just about any tranny you can think of and never had a problem

magnethead · 05-24-2007, 09:43 PM

well both DS's are out, crossmember is unbolted, 2 bolts are out of the block mount. Gonna drop the pan tomorrow and maybe hit the upper two bolts on the block.

Ivan D. · 05-25-2007, 04:16 AM

what pan are you dropping? You pull the tranny with the pan on, or else you'll damage the valve body. Obviously drain as much fluid as possible before yanking tranny out, but put the pan back on before trying to lift it.

magnethead · 05-25-2007, 10:48 AM

yea we're gonna drop the pan to drain the fluid (have to with the cooler lines) then put it back on to drop the trans.

anybody know about the 5 (or maybe 6?) bolt flexplate/convertor and fixed yoke?

Ivan D. · 05-25-2007, 11:45 AM

ain't the flexplate always held by 6 bolts? That's how my 350 is, and quite frankly I'd be a little worried if it had less bolts. Or you mean the convertor is held to the flexplate by 6 bolts? Wouldn't be surpised at all, hell even 302 (Ford's) converters get 4 bolts and honesly I was a little surprised to find only 3 holding my TH350 converter...

magnethead · 05-25-2007, 02:27 PM

yea talking flexplate to convertor bolts.

trans is out of the truck now, going to orielly's now. Seal is good, BUT IT'S THE WRONG SEAL!!!!

thing fits looser than a goose on the convertor tube.

magnethead · 05-25-2007, 07:57 PM

well, trans is out and back in. Replaced the seal and the many bolts on the pump were L-O-O-S-E (like handtight loose) so we tightened them down. After hassling the cooler lines and wiring, all thats left now is weld the exhaust crossover back on, driveshaft, trans filter and fluid.

05-23-2007, 10:09 PM	#1
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	This is going to be fun. well, i've noticed occasionally that my truck would leave a little fluid trail. I thought it was just antifreeze since my radiator has a leak. Then today i notice that there's basically a flood of fluid. 4 hours later, my dad and I deem it's a front pump seal. sO with the truck on ramps and a chip seal driveway, I get to drop the T400 and the 10 feet (or whatever a crew cab LWB driveshaft measures to) of driveshaft, with only a floor jack. The hard part is finding wheel chocks since the E-brake doesn't work worth a quarter of a penny. And tips that my dad might not reveal to me? Last edited by magnethead; 05-23-2007 at 10:09 PM.

05-23-2007, 10:41 PM	#2
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: This is going to be fun. The only tip I can give, think safety, safety, safety. Make sure that big truck doesn't fall on you. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

05-24-2007, 05:25 AM	#3
bb1979 Registered User Join Date: Apr 2007 Location: NSW, Australia Posts: 205	Re: This is going to be fun. I've been there done that with the jack did it once and vowed never again. If you haven't already started take the motor and tranny out together through the top its just way to hard from underneath unless you have a tranny shop.

05-24-2007, 07:47 AM	#4
Texas Lefty Registered User Join Date: Mar 2007 Location: Denton county Texas Posts: 15	Re: This is going to be fun. I have done the same repiar several times th400 in a c30 I could probably help you, possibly even find you a trans jack let me know if you still need help

05-24-2007, 07:50 AM	#5
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: This is going to be fun. That is why I own a two post lift. I don't have to crawl around under a shde tree NO MO.

05-24-2007, 11:19 AM	#6
wedgemon Registered User Join Date: Jul 2004 Location: Spanish Springs, NV Posts: 1,171	Re: This is going to be fun. MMMMmmm, 2 post lift.... __________________ 2003 Silverado K1500 Z71 - Arrival Blue 1973 K5 Cheyenne Blazer 350/TH350/NP203 Kids Trucks:92 K1500 Blazer 5.7/700R4 4" lift. RETIRED: 1980 Scottsdale 4x4 Founding Member: "TILT WHEEL BELLY." Club

05-24-2007, 05:28 PM	#7
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: This is going to be fun. well, we have the back tires in the air now and I have the convertor and starter unbolted and ready for the back segment of the DS to come off. Something that caught my dad by surprise- a 5 bolt flexplate and a fixed yoke. Are these part of the camper special package with the 4.10's and factory engine oil cooler? My dad said all the 400's he's had in his full bodies and camaro's were all 3 bolt slip yokes.

05-24-2007, 06:54 PM	#8
lurch115 Registered User Join Date: Oct 2006 Location: iowa Posts: 722	Re: This is going to be fun. hey, just a little tip for ya....you can turn your floor jack into a tranny jack really easy....find an old fly wheel, (i made mine with a flywheel from a 6.2 diesel) and then find a pin that will fit in the same hole that the jack pad is already in.....then weld that pin into the center hole on the flywheel...(you might have to make the center hole a little bigger so that the pin can fit through it because you'll want it welded on both sides of the flywheel) and then after doing that find a short chain (about 2.5 or so feet long) and bolt it to one of the holes for the torque converter....and there ya go....i've used mine for years and on just about any tranny you can think of and never had a problem __________________ "Horsepower is how fast you hit the wall, torque is how far you carry the wall with you." '84 chevy half ton short box 2wd, 67,000 actual miles '03 chevy 1500 HD crew cab 4x4 standard box, 6.0L

05-24-2007, 09:43 PM	#9
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: This is going to be fun. well both DS's are out, crossmember is unbolted, 2 bolts are out of the block mount. Gonna drop the pan tomorrow and maybe hit the upper two bolts on the block.

05-25-2007, 04:16 AM	#10
Ivan D. glamoros piece o' lowlife Join Date: Mar 2007 Location: Redford, MI Posts: 1,164	Re: This is going to be fun. what pan are you dropping? You pull the tranny with the pan on, or else you'll damage the valve body. Obviously drain as much fluid as possible before yanking tranny out, but put the pan back on before trying to lift it. __________________ The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express

05-25-2007, 10:48 AM	#11
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: This is going to be fun. yea we're gonna drop the pan to drain the fluid (have to with the cooler lines) then put it back on to drop the trans. anybody know about the 5 (or maybe 6?) bolt flexplate/convertor and fixed yoke?

05-25-2007, 11:45 AM	#12
Ivan D. glamoros piece o' lowlife Join Date: Mar 2007 Location: Redford, MI Posts: 1,164	Re: This is going to be fun. ain't the flexplate always held by 6 bolts? That's how my 350 is, and quite frankly I'd be a little worried if it had less bolts. Or you mean the convertor is held to the flexplate by 6 bolts? Wouldn't be surpised at all, hell even 302 (Ford's) converters get 4 bolts and honesly I was a little surprised to find only 3 holding my TH350 converter... __________________ The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express

05-25-2007, 02:27 PM	#13
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: This is going to be fun. yea talking flexplate to convertor bolts. trans is out of the truck now, going to orielly's now. Seal is good, BUT IT'S THE WRONG SEAL!!!! thing fits looser than a goose on the convertor tube.

05-25-2007, 07:57 PM	#14
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: This is going to be fun. well, trans is out and back in. Replaced the seal and the many bolts on the pump were L-O-O-S-E (like handtight loose) so we tightened them down. After hassling the cooler lines and wiring, all thats left now is weld the exhaust crossover back on, driveshaft, trans filter and fluid.



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