ok have two auto s 89 ,90 both have two 1 inch rear shafts
parted a 92 5 spd this one has one large 1 1/2 one 1 inch is this typical of a five spd car or an anomoly ? Possibly I can dig thru the forums . If u could answer it would help.. :2huh:
thanks mike
is it safe to say those are much stronger and worth using than the auto ?
or over kill I have a set and when I over haul the rear thinkin swap em out. ?
craig
I'm not sure if they are stronger or not. Some people say they are, and some even go so far as to run 2 fat axles, but 99% of the time when an axle fails on one of these cars, it breaks right off at the spindle, and since the outer par of the axle is the same on all of them, I don't think it would be an issue. I have also heard people say it was done to try to reduce wheel hop, which the 5-speed cars have serious problems with. Unless we get a hold of the engineer who decided to make the one shaft thicker, we may never know.
As for whether you should swap them in or not, I would say it probably isn't necessary. Pretty much only the 5-speeds break axles because driveline shock is what breaks them, not power. Since the auto loads the axles up and then keeps them loaded, the autos don't have any real problems breaking axles. Some guys are even running 11s passes on stock SC axles, and as long as they have an auto instead of a 5-speed, the axles hold up. If you happen to grab a set while parting out a car, its good to have a spare set of axles laying around in case something happens, but if there is no problem with your axles now, I would leave well enough alone.
Agreed....fat axles with greater mass were intended to reduce wheel hop and are not any stronger than the standard diameter axles. I'm still using stock halfshafts in both of my SCs.
I was told the Mark VIII LSC axles were the strongest of all axles. There are brand new ones on Ebay right now for 85.00 per axle through a Panoz dealer.
There definitely is a difference. If you put the 2 axles side by side, you can see the Mark axles are much thicker. And then SC axles are thicker still.
Mark VIII LSC shafts from the last 3 years are the strongest of all the MN12 shafts. They used a different hardening process but they are only a hundred Newton Meters stronger in yield (3900 vs. 3800 for the SC shafts) so not worth the upgrade IMHO but if you have to replace one might as well go with the strongest ones available!!!!
Original question : I have a fat shaft and wanted to see if worth the effort to put in car ? also wanted to see if you can run too .? not knowing without setting them side by side if there is any difference side to side. Seeing that david n. is running consistant mid 10 s on standard sc axles dont see what difference it makes ..really .
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
TCCoA Forums
1.5M posts
26.9K members
Since 2002
A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!