TH400 Tailshaft Housing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andrew68c10 · 03-07-2010, 10:55 PM

I need to replace the tail housing gasket on my TH400. Has anyone done this? Does the tailhousing cover any gears or anything else that may come apart?

71meangreenc10 · 03-07-2010, 11:10 PM

Covers the speedo gears, just take out the worm gear out the side and pull it apart. The round gear shouldnt come off unless you try to pry it off. Should have the clip in it to keep it on the shaft.

Smitty

petey-pablo · 03-08-2010, 07:53 AM

I changed mine out already once just support the transmission because once you pull off the Tailshaft Housing to replace the gasket the tranny falls a couple of inches because thats what supports the tranny. Then make sure you have something to catch all the oil that is going to fall out. their is some gears in there but they will not be affected by the change of the gasket so you can't mess anything up, nothing will fall out only oil.. Ok heres a picture of mine when I had it uncoverd it might be upside down though but you can still see inside. The only thing that might be different in yours is the shaft mine is messed up. Hope this helps.Pablo

03-07-2010, 10:55 PM	#1
Andrew68c10 Registered User Join Date: Sep 2000 Location: Paso Robles, CA Posts: 178	TH400 Tailshaft Housing I need to replace the tail housing gasket on my TH400. Has anyone done this? Does the tailhousing cover any gears or anything else that may come apart? __________________ 1968 Chevy C10 Longbed Fleetside

03-07-2010, 11:10 PM	#2
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: TH400 Tailshaft Housing Covers the speedo gears, just take out the worm gear out the side and pull it apart. The round gear shouldnt come off unless you try to pry it off. Should have the clip in it to keep it on the shaft. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van"

03-08-2010, 07:53 AM	#3
petey-pablo "THE GREEN GOBLIN" Join Date: Mar 2008 Location: Fremont Ca. Posts: 1,025	Re: TH400 Tailshaft Housing I changed mine out already once just support the transmission because once you pull off the Tailshaft Housing to replace the gasket the tranny falls a couple of inches because thats what supports the tranny. Then make sure you have something to catch all the oil that is going to fall out. their is some gears in there but they will not be affected by the change of the gasket so you can't mess anything up, nothing will fall out only oil.. Ok heres a picture of mine when I had it uncoverd it might be upside down though but you can still see inside. The only thing that might be different in yours is the shaft mine is messed up. Hope this helps.Pablo Attached Images __________________ Petey-pablo "THE GREEN GOBLIN" 1972 Cheyenne 10 Short Fleet Side Front 2.5inch Spindles with 2inch Springs Rear 4inch drop Springs. 454BBC TH400,Posi 1971 Cheyenne 10 Long Fleet Side 454BBC TH350,Posi Sold Drive it like you stole it! Petey-pablo@sbcglobal.net Last edited by petey-pablo; 03-08-2010 at 08:02 AM. Reason: added picture



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