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> Another Dr. Evil transmission build. This one has some fancy bits
Cap'n Krusty
post Nov 18 2012, 12:34 AM
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QUOTE(Dr Evil @ Nov 17 2012, 10:46 AM) *

QUOTE(Dave_Darling @ Nov 17 2012, 12:47 PM) *

My mechanic had a number of unkind things to say about the brass-caged ones when we did the rebuild. He preferred the steel-caged bearings as well; probably because they were one unit and didn't fall apart as you were trying to install them. (At least, that's the impression that I got from what he was saying.)

--DD


The cages and balls can fall out, but the balls are captive in the cage. The main thing is that the steel doe snot shatter and the brass shatters very easy. I have seen more than once where a new one broke with minimal effort (not by me, luckily). That is a $200+ bearing that does this.


I haven't really had a problem with the replacement brass cage bearings over the last 39 years, but I haven't done nearly as many trannies as you have. No comebacks, though, so the bearings must be holding up ..............

The Cap'n
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Dr Evil
post Nov 18 2012, 09:57 AM
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QUOTE
I haven't done nearly as many trannies as you have.


Sounds like a veiled insult! (IMG:style_emoticons/default/wink.gif)

Seriously, I have not had a single standard brass bearing come back after I replaced it, but I have had to replace a lot of the brass caged bearings due to them being destroyed. I have never needed to replace a steel caged one. The brass is adequate, but inferior to the steel.
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Cap'n Krusty
post Nov 18 2012, 10:13 AM
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QUOTE(Dr Evil @ Nov 18 2012, 07:57 AM) *

QUOTE
I haven't done nearly as many trannies as you have.


Sounds like a veiled insult! (IMG:style_emoticons/default/wink.gif)

Seriously, I have not had a single standard brass bearing come back after I replaced it, but I have had to replace a lot of the brass caged bearings due to them being destroyed. I have never needed to replace a steel caged one. The brass is adequate, but inferior to the steel.


No insult, veiled or otherwise, meant. Just 'cause I'm generally krusty doesn't mean everything I say is that way ............................................


Carry on with the good work!

The Cap'n
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Dr Evil
post Dec 30 2012, 09:59 PM
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Time for an update. I did some LSD tonight, I am not that fond of this procedure, but it is necessary (IMG:style_emoticons/default/smile.gif) In the original pics of the intermediate plate it shows the old bearing retainer. That would not be good enough for Qarl, oh no! He went all fancy (IMG:style_emoticons/default/smile.gif) I put the fancy one on once I found he had shipped one (IMG:style_emoticons/default/rolleyes.gif)


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Qarl
post Dec 30 2012, 10:28 PM
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QUOTE(Dr Evil @ Dec 30 2012, 10:59 PM) *

Time for an update. I did some LSD tonight, I am not that fond of this procedure, but it is necessary (IMG:style_emoticons/default/smile.gif) In the original pics of the intermediate plate it shows the old bearing retainer. That would not be good enough for Qarl, oh no! He went all fancy (IMG:style_emoticons/default/smile.gif) I put the fancy one on once I found he had shipped one (IMG:style_emoticons/default/rolleyes.gif)



Muhahaha
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turk22
post Dec 31 2012, 12:00 PM
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Its beautiful....

but it makes me feel stupid. (IMG:style_emoticons/default/headbang.gif)
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Bleyseng
post Dec 31 2012, 12:16 PM
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Why the LSD?

Is it because of all the extra weight the longest ever 9146gt build will carry now?
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a914622
post Dec 31 2012, 08:00 PM
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Isnt that a tork biased differential? not a lsd.

jcl
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Qarl
post Dec 31 2012, 08:01 PM
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Yes.. it is a torsen (torque biasing) differential. Different characteristics than the LSD.
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Dr Evil
post Jan 1 2013, 01:56 PM
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For most people, LSD is not delineated into Tq bias or puck type. So, LSD is slang.
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Dr Evil
post Mar 29 2013, 11:48 PM
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I had time to get back on this build tonight. Qarl told me to take my time (IMG:style_emoticons/default/smile.gif) I set the pinion depth to spot on factory spec and only need to clean the tail cone and button her up then ship her out.


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Cap'n Krusty
post Mar 30 2013, 09:27 AM
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Tell me that's not a redneck jackstand in the last picture! ..........................

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MDG
post Mar 30 2013, 09:42 AM
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QUOTE(Cap'n Krusty @ Mar 30 2013, 11:27 AM) *

Tell me that's not a redneck jackstand in the last picture! ..........................

The Cap'n


No, sir. That appears to be a medical grade transmission lift.
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sixnotfour
post Mar 30 2013, 02:52 PM
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ball retianer


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Mark Henry
post Mar 30 2013, 03:46 PM
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That looks like a thick flange on the side cover. Does the 901 suffer from the diff trying to spread apart under high HP ?

Besides 1st what are the weak links in a 901?
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iamchappy
post Mar 30 2013, 04:41 PM
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Forget Qarl send that thing to me. Mike i wish i could get you up here to look at my transmission, i would love to have a longer gear for 5th.
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Dr Evil
post Mar 30 2013, 05:22 PM
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QUOTE(sixnotfour @ Mar 30 2013, 04:52 PM) *

ball retianer


That retainer would not work in the 901 race as there is two grooves and a raised part between them.
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Dr Evil
post Mar 30 2013, 05:29 PM
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QUOTE(Mark Henry @ Mar 30 2013, 05:46 PM) *

That looks like a thick flange on the side cover. Does the 901 suffer from the diff trying to spread apart under high HP ?

Besides 1st what are the weak links in a 901?


Not really necessary, but people do what they want (IMG:style_emoticons/default/smile.gif)


The weak parts:

- 1st gear, cant be helped

- Gears, cant be helped. They are thinner than the 915, 930, G50, etc gears so they can shear under extreme stress.

- Input shaft intermediate plate bearing, change to a steel caged one if you can find one. Otherwise, be gentile while handling or the shitty brass cage will break.


No need to adjust gearing until 3.0 and higher. I have a 2.7 that is doing just fine. You have to consider RPM and HP. How low of an RPM will have how much HP? Too much HP at Low RPM = untimely death in wrong gear.....like down shifting into 1st form 5th doing 150mph.
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Mark Henry
post Mar 30 2013, 05:47 PM
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QUOTE(Dr Evil @ Mar 30 2013, 07:29 PM) *

How low of an RPM will have how much HP? Too much HP at Low RPM = untimely death in wrong gear.....like down shifting into 1st form 5th doing 150mph.


I think in that scenario you would have more to worry about than just your tranny....
There again in that scenario maybe the 901 letting go would be a good thing. (IMG:style_emoticons/default/wink.gif)
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sixnotfour
post Mar 30 2013, 08:00 PM
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QUOTE(Dr Evil @ Mar 30 2013, 04:22 PM) *

QUOTE(sixnotfour @ Mar 30 2013, 04:52 PM) *

ball retianer


That retainer would not work in the 901 race as there is two grooves and a raised part between them.


worked great in mine ??
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