Duramax Diesels Forum Truck of the Week
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Old 03-03-2019, 02:06 PM
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Default SC rebuild question

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?
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File Type: jpg pump plate hole.jpg (120.8 KB, 142 views)
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Old 03-03-2019, 02:37 PM
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That's factory.
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Old 03-03-2019, 02:50 PM
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Quote:
Originally Posted by adeso View Post
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.
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Old 03-03-2019, 04:34 PM
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Thanks guys! just caught me off guard to see a half drilled hole.
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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Old 03-03-2019, 04:54 PM
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Not half drilled. It is .020 and chamfered on one side.
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Old 03-03-2019, 05:16 PM
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Quote:
Originally Posted by Mike L. View Post
Not half drilled. It is .020 and chamfered on one side.
I suppose I should have looked at it closer - 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.
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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Old 04-12-2019, 03:59 PM
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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!
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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Old 04-12-2019, 04:55 PM
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Yes you can
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Old 04-12-2019, 06:38 PM
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thanks!
May have jumped in over my head with this but one day Ill get it figured out.
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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Old 04-12-2019, 07:03 PM
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Quote:
Originally Posted by gmac32 View Post
Yes you can
Are you sure? Ever look at the torrington bearings? Never seen a difference?
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Old 04-12-2019, 07:33 PM
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Nope. I thought the only difference really was the castings
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Old 04-12-2019, 07:34 PM
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I have both. I will have to look
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Old 04-12-2019, 07:51 PM
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Quote:
Originally Posted by adeso View Post
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 itís 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 wonít effect what you are doing.
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Old 04-13-2019, 05:02 PM
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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?
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File Type: jpg 1 trans bearing.jpg (130.5 KB, 43 views)
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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Old 04-14-2019, 09:52 AM
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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.
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02 Chevy LB7 CCLB, 8 inch lift "lowered" 35s/front end stuff, SDP triple 300s! Dual CP3
Mild build engine 100% over inj AD165 LBZ reg, Goerend converter Tuned by Rob
11.70 116 - on 37s
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