Input shaft help/options on 84 tranny
#1
Rennlist Member
Thread Starter
Input shaft help/options on 84 tranny
So my rebuilder says when he spins the input shaft bearing freehand he can feel a slight "sandpaper" feeling to the bearing. This tranny only has 34k miles on it. I went out to 928intl and a new one is 650$.
How concerned should I be? Are there alternate parts or sources?
thanks for any intel!
How concerned should I be? Are there alternate parts or sources?
thanks for any intel!
#2
Addict
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Lifetime Rennlist
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If it was a $35 wheel bearing what would you do ? And wheel bearings are easy to go back in and change. So now that your rebuilder questions the bearing if you do not replace it you pretty much void any warranty !
#3
Administrator - "Tyson"
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#4
Former Vendor
So my rebuilder says when he spins the input shaft bearing freehand he can feel a slight "sandpaper" feeling to the bearing. This tranny only has 34k miles on it. I went out to 928intl and a new one is 650$.
How concerned should I be? Are there alternate parts or sources?
thanks for any intel!
How concerned should I be? Are there alternate parts or sources?
thanks for any intel!
When clean, lube it with WD40 (or any thin oil) and see how it feels.
It's a simple matter to inspect the ***** and the races for condition. A flashlight held so one can see the race, ispecting from each side, and looking at both the inner and outer race, while slowly rotating the bearing, will show any flaws.
If not able to see every little detail, push out the plastic cage that holds the *****, move the ***** all the way to one side (do not disassemble) and you can see everything. Tiny pits from metal running through the bearing are normal....you are looking for places where the entire surface of the races is coming off.
If it is bad, there is only one choice....replace it.
When the early bearing was over $600 and the '85/'86 bearing was $55, I machined the cases to accept the cheaper, larger, better bearing. While the '85/'86 bearing has "caught up" in price (still isn't $650), the cost of the machining plus the bearing gets you to about the same $650 price. I now machine the cases not to be cheaper, but to use the bigger, better bearing.
#6
Rennlist Member
Thread Starter
Thanks for the responses. I am passing the info on. Btw this is an original 34k tranny. Car has sat garaged most of its life. I have known the owner for the past 18 years and we know most of the history from there. If the bearing needs replaced I will but that bearing cost is pretty big pill to swallow....
#7
Former Vendor
Thanks for the responses. I am passing the info on. Btw this is an original 34k tranny. Car has sat garaged most of its life. I have known the owner for the past 18 years and we know most of the history from there. If the bearing needs replaced I will but that bearing cost is pretty big pill to swallow....
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#9
Rennlist Member
Thread Starter
Yeah what Jake said... someone rode second gear hard and synchro and dog teeth were shot. They tried just replacing synchro and did it incorrectly. It's been pretty much sitting in this condition for 15-16 years...
#10
Former Vendor
Mongo drive Porsche.
Very doubtful that the input shaft bearing would be bad at 35K, BTW.
#11
Rennlist Member
Thread Starter
my rebuilder took the bearing to a specialist and he said the bearing is behaving as expected. Crisis averted!