Here I go again, more tranmission parts needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

odog · 02-28-2012, 08:02 PM

For some reason my 420 trans is is leaking 80/90 out the front. I got home this evening and smelled gear oil, crawled under and found that the clutch and front of the trans is wet with 80/90. Im guessing the seal is leaking around the input shaft, or maybe that cover is broke?? When I put it all together, I didnt think I over tightened the bolts on the front cover, but maybe I did. If it is broken, is the front cover off a 465 the same as on a 420? If not does anybody have one they want to get rid of? I dont want to pull this trans again unless I have everything there that will take care of the problem. If its just a seal no big deal, but if the cover is broken, I want to have it on hand so I can put it all together.

odog · 02-28-2012, 08:06 PM

Ok so I just looked and found that the front bearing retainer cover on the 420 is 4 11/16 inches while the front cover on the 465 is 5 1/8 inches, so I guess that option is out. Does anybody have a front bearing retainer cover for a sm420 that they want to sell?

02-28-2012, 08:02 PM	#1
odog Registered User Join Date: Oct 2007 Location: Wendell, Idaho Posts: 608	Here I go again, more tranmission parts needed For some reason my 420 trans is is leaking 80/90 out the front. I got home this evening and smelled gear oil, crawled under and found that the clutch and front of the trans is wet with 80/90. Im guessing the seal is leaking around the input shaft, or maybe that cover is broke?? When I put it all together, I didnt think I over tightened the bolts on the front cover, but maybe I did. If it is broken, is the front cover off a 465 the same as on a 420? If not does anybody have one they want to get rid of? I dont want to pull this trans again unless I have everything there that will take care of the problem. If its just a seal no big deal, but if the cover is broken, I want to have it on hand so I can put it all together. __________________ 1969 4x4 Nothing beats a good rock drill and some dynamite

02-28-2012, 08:06 PM	#2
odog Registered User Join Date: Oct 2007 Location: Wendell, Idaho Posts: 608	Re: Here I go again, more tranmission parts needed Ok so I just looked and found that the front bearing retainer cover on the 420 is 4 11/16 inches while the front cover on the 465 is 5 1/8 inches, so I guess that option is out. Does anybody have a front bearing retainer cover for a sm420 that they want to sell? __________________ 1969 4x4 Nothing beats a good rock drill and some dynamite



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