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Leak from the Pinion seal

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Leak from the Pinion seal

Post #1 by StarDiero75 » Mon Apr 16, 2018 3:01 am

Howdy guys,

I got a 66 8" from a mustang and supposedly it was rebuilt, but for who knows how long it sat. It looks like it leaks from the front of the pinion seal, is this easily fixed?

--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), 1968 1.08 Autolite 2100 with VI adapter, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

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Re: Leak from the Pinion seal

Post #2 by drag-200stang » Wed Apr 18, 2018 9:05 am

It can be done but it has to be done a certain way.... Unless you want to change the ratio or you know there is something wrong, just put fresh gear lube and run it....Make sure that the vent is clear....It may seal up or discover other problems...Only way to know is to run it and then decide.
66 Mustang Coupe
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.

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Re: Leak from the Pinion seal

Post #3 by mustang6 » Thu Apr 19, 2018 4:09 am

You can replace the pinion seal, just need to be careful to retorque the pinion to the exact rating listed in the shop manual. Too much and you will crush the crush sleeve more and screw up the third member tolerances (then it has to be pulled out and started over with a new crush sleeve and some specialized tools). If it comes to that, pay a little extra and have them do it with shims instead of a crush sleeve, then you can change the pinion yoke and seal in the future without concerns.

68 Mustang 200 ci, Aussie 250-2V head, Dual Headers, Comp Cams 252H, DSII w/MSD 6AL, T-5, V8 suspension.

65 Ranchero 200 ci, late 170 head, Autolite 1101, 3.03 3 speed, Maverick 8" 4 lug rear with 3.55 gears.

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