SC rebuild question

[adeso]

I'm doing a trans rebuild on my truck (due to Trim A spring failing) and noticed a half drilled hole on the oil pump plate. Any idea why SC would do this?

 

[Ne-max]

That's factory.

 

[Mike L.]

I'm doing a trans rebuild on my truck (due to Trim A spring failing) and noticed a half drilled hole on the oil pump plate. Any idea why SC would do this?

Factory ballance hole for pressure regulator valve.

 

[adeso]

Thanks guys! just caught me off guard to see a half drilled hole.

 

[Mike L.]

Not half drilled. It is .020 and chamfered on one side.

 

[adeso]

Not half drilled. It is .020 and chamfered on one side.

I suppose I should have looked at it closer :roflmao: - Thanks Mike!
First Allison I have done and the manual didn't mention anything about it and the trans has already been modified by SC.

 

[adeso]

another newb/ dumb guy question.

Can I take the pump and bell housing off an 02 and put it on the front of an 05 or is there anything different with the input shafts? I'm putting a SC P1 sungear in if that makes a difference.

I was under the impression they are the same other than the cooler lines but just want to make sure I'm not missing something

Thanks!

 

[gmac32]

Yes you can

 

[adeso]

thanks!
May have jumped in over my head with this but one day Ill get it figured out.

 

[Mike L.]

Yes you can

Are you sure? Ever look at the torrington bearings? Never seen a difference?

 

[gmac32]

Nope. I thought the only difference really was the castings

 

[gmac32]

I have both. I will have to look

 

[Evan@InglewoodTrans]

another newb/ dumb guy question.

Can I take the pump and bell housing off an 02 and put it on the front of an 05 or is there anything different with the input shafts? I'm putting a SC P1 sungear in if that makes a difference.

I was under the impression they are the same other than the cooler lines but just want to make sure I'm not missing something

Thanks!

For visual purposes: As long as you lift the bell housing complete by taking just the outer bolts out (stator support/pump stay together) and dropping it onto your trans it’s fine. The difference in input shaft is on the input drum side only. From 01-02 some and oddball 03 the T1 bearing is different then the later shafts and it won’t effect what you are doing.

 

[adeso]

next question, am I reatarded or does the ATSG show the P1 to P2 bearing facing different directions in the overview vs the install detail?

 

[adeso]

and follow on question-I'm guessing if it is in backwards it's pretty critical and needs to come back out ASAP. Just figured I'd ask before taking the trans back out.

 

[PureHybrid]

Two separate bearings. The page on the right, you shouldn't have the trans that far apart if you're only changing the input around

 

[adeso]

Long story short it's a complete rebuild. My SC was pretty rough, and I had an LLY 5 speed stock trans. I swapped the bellhousing pump and VB (after swapping out the broken transgo trim A spring) onto the LLY with new clutches.

Edit: it's the SC 02 bellhousing, pump and VB on an LLY trans, with a SC C2 hub, P1 sungear and P2 planetary carrier. everything else is the LLY

I have a slight bearing noise that goes away when I put it into gear that I'm trying to figure out what I did.

 

[adeso]

This was the hub and C2s in the original SC that drove me to use the other trans as a core. I just figured it would be easier to swap Bellhousings pump and VB off the SC since they all looked good.

 

[Evan@InglewoodTrans]

This was the hub and C2s in the original SC that drove me to use the other trans as a core. I just figured it would be easier to swap Bellhousings pump and VB off the SC since they all looked good.

Why did you need a core just because of the work P1 drive flange and burnt c2? Both a common wear items. I guess I’m confused as to what you actually did.

 

[adeso]

I had the lly stock trans just sitting around so just used it instead of ordering new parts. the LLY was stock just slipped a few times so no damage to the hard parts. Kind of regretting that now