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GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

ECSB 4WD 4l60E to 4l80E

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Old 09-26-2008, 05:30 PM
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Further to Step 3 above. The directions suck. Says "If end plug won't go in far enough grind this end of filter slightly." Problem is it doesn't indicate which end to grind. Anyway I wound up grinding a little off both ends to get it to fit.

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Old 09-26-2008, 05:38 PM
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Step 4 and 5:
I hope whatever high pressure this relieves happens enough to "fix" it. This drilling my nice valve body scares me. Plus the hope that it seals.

Use this piece as a jig and drill a hole. Assemble the relief plunger and tap 2-3 times lightly with a hammer to seat it when done.
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Shot of the hole both sides of VB when you are done.
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Last edited by KySilverado; 09-26-2008 at 06:49 PM.
Old 09-26-2008, 07:07 PM
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Step 6 is drilling the plate holes for firmness and putting a new spring under the 3rd Accum piston. Skipping this until I figure out what size holes I want.

Step 7:
Installing the new boost valve and springs. Old below-new on top.
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Step 8.
Replace old bolt with new stronger bolt.
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Step 9:
Put a bushing here on 1-2 Servo pin.
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Step 10.
Change orange spring in the 1-2 accum piston.
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Tada Trango install in 10 easy steps. Only thing left is putting the valve body back on. Aligning plates and gaskets and such.
Old 09-27-2008, 01:37 PM
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Finishing up the Transgo portion.

Drilled the seperator plate for shifts like this. Leaves room to go more aggressive if I like internal to the trans. There of course is also opportunity to tune via the PCM.

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Shot of the new white spring for the 3rd Accum. EDIT: THIS IS WRONG CORRECTED LATER IN THREAD.
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Acuum body all buttoned back up.
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Per the trango instructions Don't use the check ball circled in the picture. Originally 8 go back with 7. You should be able to pick them out in the picture.
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Valve body back on. Notes for the new relief valve on and align the manual shift valve.
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All I like as far as the transmission is new filter and have a stock pan with drain pan lined up to go on.

Last edited by KySilverado; 11-30-2008 at 08:08 PM.
Old 09-27-2008, 01:49 PM
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Starting the cross member modifications tomorrow. Picked up one to modify from a forum member. Cost $75

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Old 09-29-2008, 04:58 PM
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Spent a little time on the cross member yesterday.

Basically cutting about 6" each way from center line of the transmission mount. Then move that section about 2.5" rearward is the goal.
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This is how it should look when I get it all welded back up.
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Couldn't find any flat bar here local so bought some 3" and 1" and welded them together.
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I don't claim to be a welder. Soooo..... comment if you like
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Will comment that if you have to weld with a mig do it the right way and use gas. I tried the first few welds with flux core. Ran and filled the tank today and it welds mucccchhhh better.
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Last edited by KySilverado; 09-29-2008 at 06:29 PM.
Old 09-29-2008, 07:25 PM
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that looks great! your doing a very thorough job! good thread
Old 09-30-2008, 10:30 AM
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Thanks for the comments guys. Hope this thread will be the best going for the conversion.

I want to add another comment regarding welding. Of course I knew this as will guys that weld a lot but I threw caution to the wind... I dawned the welding gloves and mask of course but short pants and short sleeves. All I did last night was weld the plate in the last picture. I have some very nice weld burns (sun burn) on my legs and arms today. OUCH!
Old 09-30-2008, 11:44 AM
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I had to cut my cross member on the top cause the plate i welded in was hitting my y pipe and it wouldnt bolt up long story short i ended up in the e.r friday night with a piece of slag in my eye i was even wearing safety glasses so this was a expensive mistake for me I have no insurance.
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Old 09-30-2008, 05:54 PM
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Originally Posted by Pewter53
I had to cut my cross member on the top cause the plate i welded in was hitting my y pipe and it wouldnt bolt up long story short i ended up in the e.r friday night with a piece of slag in my eye i was even wearing safety glasses so this was a expensive mistake for me I have no insurance.
Yep forgot to mention I always wear the safety glasses. Been there done that.... not bad enough to go to the ER.


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