Another Newbie with a tranny question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dharhigh1 · 07-02-2006, 12:07 PM

Hello All! I've been reading this forum constantly and you all have been very helpful. Two weeks ago I picked up my 72 C10 LB 350/350, which I have wanted one of these forever. It has just been painted and the engine rebuilt, it has plenty of new parts all over on it and I got it for $2,775.
It does have some small things I am dealing with mainly electrical like the gages etc. Also the rear seal is leaking in the transmission (Turbo 350) and I have a carrier bearing midway, any tips that you can offer on changing this rear seal out. I have already bought it so I just need to do the dirty work.
Thanks in advance,
Dan

Sweet72 · 07-02-2006, 12:57 PM

If your t350 rear seal is leaking it's very likely that the output shaft bushing is the cause. Relatively easy to change, remove rear u-joint u-bolts and drop driveshaft, pull bolts that mount center carrier brng., shaft will just slide out of tranny. Have a drip pan under the tail shaft to catch fluid. remove four bolts that hold the tailshaft housing on. Remove tailshaft hsg. and pull seal and take note of location of bushing, carfully drive out bushing. With a bushing driver or appropriately sized socket, drive new bushing in the same position and install new seal with aviation form a gasket around it's perimeter. Reinstall everything and your done. Might be a good time to replace carrier bearing and check u-joints.

dharhigh1 · 07-02-2006, 02:09 PM

Thanks for the help, the carrier looks like it's new.
Truthfully the rear seal in the tranny does too, that may be why what your saying makes sense and that it is the shaft bushing.
Thanks again,

TugOwar · 07-02-2006, 02:38 PM

Welcome from South TX

LUV2XCLR8 · 07-02-2006, 08:32 PM

68haywagon · 09-13-2006, 10:18 PM

to the board!!

Mike

07-02-2006, 12:07 PM	#1
dharhigh1 Registered User Join Date: Jun 2006 Location: Indiana Posts: 11	Another Newbie with a tranny question. Hello All! I've been reading this forum constantly and you all have been very helpful. Two weeks ago I picked up my 72 C10 LB 350/350, which I have wanted one of these forever. It has just been painted and the engine rebuilt, it has plenty of new parts all over on it and I got it for $2,775. It does have some small things I am dealing with mainly electrical like the gages etc. Also the rear seal is leaking in the transmission (Turbo 350) and I have a carrier bearing midway, any tips that you can offer on changing this rear seal out. I have already bought it so I just need to do the dirty work. Thanks in advance, Dan Attached Images

07-02-2006, 12:57 PM	#2
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: Another Newbie with a tranny question. If your t350 rear seal is leaking it's very likely that the output shaft bushing is the cause. Relatively easy to change, remove rear u-joint u-bolts and drop driveshaft, pull bolts that mount center carrier brng., shaft will just slide out of tranny. Have a drip pan under the tail shaft to catch fluid. remove four bolts that hold the tailshaft housing on. Remove tailshaft hsg. and pull seal and take note of location of bushing, carfully drive out bushing. With a bushing driver or appropriately sized socket, drive new bushing in the same position and install new seal with aviation form a gasket around it's perimeter. Reinstall everything and your done. Might be a good time to replace carrier bearing and check u-joints. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

07-02-2006, 02:09 PM	#3
dharhigh1 Registered User Join Date: Jun 2006 Location: Indiana Posts: 11	Re: Another Newbie with a tranny question. Thanks for the help, the carrier looks like it's new. Truthfully the rear seal in the tranny does too, that may be why what your saying makes sense and that it is the shaft bushing. Thanks again,

07-02-2006, 02:38 PM	#4
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: Another Newbie with a tranny question. Welcome from South TX

07-02-2006, 08:32 PM	#5
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,484	Re: Another Newbie with a tranny question. __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

09-13-2006, 10:18 PM	#6
68haywagon I'm watching you! Join Date: Feb 2005 Location: Levittown, PA Posts: 1,822	Re: Another Newbie with a tranny question. to the board!! Mike __________________ 2012 Chevrolet Silverado 1500 Z71 4WD 1993 Chevrolet C-1500 W/T - Blue - 4.3L V-6, 4 speed auto - Dad's (RIP) 1992 Chevrolet S10 - LS swap project 1968 Chevrolet C-10 longbed fleetside - sold



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