4 sp Loosing Oil - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DANL · 08-25-2003, 09:20 PM

Hey everybody, unfortunately the manual 4 speed in my K5 is loosing oil. Appears to be coming from front seal. I think transmission is in great shape other than leak. I can not repair it myself and must take it to a shop. Do I have a standard seal installed? Also any recommendations or advise on other things to have done while tranny is out?
Thanks in advance.

...Dan

jef5150 · 08-25-2003, 10:35 PM

seeing that theyre gonna hafta pull the tranny to fix the front seal,you might as well do the rear seal also,it probablly just as old.maybe just re-seal the whole unit,,,,,,no sense in having to pull it back out in 3 months,,,,,jeff

crazy longhorn · 08-26-2003, 12:48 AM

also, an old rule of thumb was replce the input shaft bearing .....whenever the trans came out(just for peace of mind). Im not sure how the clutch works for you, but the throwout bearing is another source of possible trouble if its been in for a while. It might cost a little more, but in the longrun possibly save another labor bill. Good luck, crazyL

JimKshortstep4x4 · 08-26-2003, 07:50 AM

Have you checked the vent on the transmission?

It might be worth checking since if it it is plugged, the pressure will force oil out.

Jim

DANL · 08-26-2003, 08:14 AM

Hey Jeff/crazyl/Jim, thanks for the quick response and good advise.

...Dan

08-25-2003, 09:20 PM	#1
DANL Senior Member Join Date: Mar 2002 Location: Bartlett, TN Posts: 348	4 sp Loosing Oil Hey everybody, unfortunately the manual 4 speed in my K5 is loosing oil. Appears to be coming from front seal. I think transmission is in great shape other than leak. I can not repair it myself and must take it to a shop. Do I have a standard seal installed? Also any recommendations or advise on other things to have done while tranny is out? Thanks in advance. ...Dan

08-26-2003, 12:48 AM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	also, an old rule of thumb was replce the input shaft bearing .....whenever the trans came out(just for peace of mind). Im not sure how the clutch works for you, but the throwout bearing is another source of possible trouble if its been in for a while. It might cost a little more, but in the longrun possibly save another labor bill. Good luck, crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

08-26-2003, 08:14 AM	#5
DANL Senior Member Join Date: Mar 2002 Location: Bartlett, TN Posts: 348	Thanks Hey Jeff/crazyl/Jim, thanks for the quick response and good advise. ...Dan

08-25-2003, 10:35 PM	#2
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	seeing that theyre gonna hafta pull the tranny to fix the front seal,you might as well do the rear seal also,it probablly just as old.maybe just re-seal the whole unit,,,,,,no sense in having to pull it back out in 3 months,,,,,jeff

08-26-2003, 07:50 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Have you checked the vent on the transmission? It might be worth checking since if it it is plugged, the pressure will force oil out. Jim



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