6L90 back after rebuild delay in rev 2-3 flare

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Gusta
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6L90 back after rebuild delay in rev 2-3 flare

Post by Gusta » Thu Aug 09, 2018 11:28 am

I've been checking for a leak on 1-4 3-5 rev drum. maybe im not doing it right. I took all the pistons out and cant find a leak. I built this about a month and a half ago. new pump converter master kit 1-4 3-5 rev drum and I put the sonnax zip kit in it. any ideas. I could use some help. there are no codes also.

Gusta
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by Gusta » Thu Aug 09, 2018 1:22 pm

https://www.youtube.com/watch?v=j1jkf0eKr2g im gonna test this idea out now from this video

carod
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by carod » Fri Aug 10, 2018 11:14 am

I think you are on the right track. Transgo supplies rings in there kit.

Gusta
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by Gusta » Mon Aug 13, 2018 9:34 am

I talked to Larry at Transgo and he said the rings are for gen.1 and this is a gen.2 I changed the pistons out and built the drum. I charged it with fluid and I am air testing it on the pump. The 3-5 clutch apply seams kind of weak to me.

Gusta
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by Gusta » Mon Aug 13, 2018 1:12 pm

Talked to the guys at Transgo and we did some tests. They gave me a part number a factory built 1234 3-5 rev drum. It air tests perfect so I'm cutting my loses and going with it. Not sure why my drum build doesn't seal and apply well everything is new in it but for $233 for a loaded drum I am going that route from now on.

Gusta
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by Gusta » Tue Aug 14, 2018 2:46 pm

The pre built drums seems to have done the trick. It flared a lot on the first few test drives. But my friend at the Chevy dealer says that sometimes you got drive them a bit afterwards to get it to shift right. Considering there is no clutch fill fast learn. After I reset the adapts I drove for a half hour with light throttle pressure and eventually the shifts cleaned up. Good solid shifts now. So all good.

carod
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by carod » Wed Aug 15, 2018 12:18 am

Great info Thanks, what is the part number for the re built drum?

actiontrans
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by actiontrans » Wed Aug 15, 2018 2:12 pm

the drums have a tendency to crack by the weld. very hard to see. many cases need a magnifying glass to see. also the pistons have been known to crack as well

carod
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by carod » Fri Aug 17, 2018 10:27 pm

So wouild the norm be to change the drum if the unit has a burned or bad clutch like on the CD4E?

Bryan
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Re: 6L90 back after rebuild delay in rev 2-3 flare

Post by Bryan » Tue Aug 21, 2018 10:27 am

carod wrote:
Fri Aug 17, 2018 10:27 pm
So wouild the norm be to change the drum if the unit has a burned or bad clutch like on the CD4E?

I do..

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