Gear Box Seal
Posted 03 September 2015 - 03:06 PM
Posted 03 September 2015 - 03:32 PM
Places like Datsport, Stewart Wilkins Motorsport will have them, probably get them at most spares places (Repco, etc). They are common across a large number of cars fitted with 71B boxes (pretty much most Datsuns with L-series engines from the 70's and 80's) Most bearing shops will have them as well, whether they will have a listing to know what bearing is required is another question - bearing shops will refer to them by outer diameter, inner diameter and thickness rather than what car they fit.
To replace, just poke a big-ish screwdriver in behind the "lip" of the old seal and lever it out (being careful not to scratch the housing it presses into). Check that there is no groove or other damage on the tailshaft input. Clean the area. Run a smear of oil on the sealing part of the seal (the "lip" that the tailshaft yoke runs in) Then just push the new seal in, being careful not to let it "twist" or "cock" in the housing - try to keep it straight as you tap it in place with a hammer. If you have a large socket or similar (or even a bit of wood with a hole in it), use that as a "drift" on the outer edge of the new seal to drive it in evenly, otherwise tap it in carefully all around the edge, a very small amount at a time.
EDIT: Here he is http://www.swmotorsp...roducts_id=1145
Judging by that link, the 71C boxes probably have the same seal (as it mentions it fits a 200SX 5 speed)
Edited by 1600dave, 03 September 2015 - 03:50 PM.
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Posted 03 September 2015 - 05:15 PM
I bought both front and rear 71B seals from Stewart Wilkins earlier this year, hassle free and quick turn around
Posted 03 September 2015 - 09:29 PM
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Posted 04 September 2015 - 09:20 AM
If on install it still weeps, you may need the outer diam of the yoke shaft sleeved, if badly grooved, or if lightly, ( run your thumb nail along it) i slight touch on a lathe, and a fine polish finish may fix.
Otherwise, another front yoke/shaft assy will be needed.
As the diff (assuming a Z) is fixed, the tailshaft does not move fore/aft like cart axle sprung cars, hence the fine wear groove!
Posted 04 September 2015 - 03:17 PM
Good advise on the yoke surface I will double check this. Thank you.
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