I rebuilt my 05 4l60e a few months ago and all works fine except a delay to 4th gear...

I was trouble shooting, thought I would try another valvebody with forward/reverse abuse valves, oversized afl, and o ringed end plugs...

This is what I found when I took the spacer plate off...




Looks like I forgot to put 4th accumulator pin,spring, and piston in....

 

I am guessing that you did not plug-off or block the passage for 4th fluid, in the bottom of the bore next to the lube orifice...?

How is the 2nd accumulator piston and spring arranged... how is the accumulator valve-train arranged?

 

No I didn't block anything at all... I must have completely missed it... In the garage I just found the pin, transgo yellow spring , and an aluminum piston that was meant to be installed .

The 1-2 is a stock replacement. No washers or tricks...


The valve train is all stock... no mods on valvebody except a fitzall valve..

 

Yes, that is your problem.

 

Hell, block it instead of installing the piston and spring? No?

 

I'm guessing that these things are for blocking something . They came in same bag as the transgo 4th yellow spring

 

Ummm, I cant answer that. Possibly with loctite?

Two things I know for sure you can do. Is drive a checkball in the bore, Then stake it.
Or you can just as easily tap the hole and install a 5/16 set screw with loctite also. Just be cautious of the metal chips but seeing the trans is in the vehicle the chips should fall down.

 

those are for the reverse input drum piston

they're hot garbage

throw them out

for the 3-4 accum just use a 5/16 setscrew

 

What happens If I just install the pin, spring, and piston? It's just a normal stock build

 

You would restore back the 4th accumulation.

 

Ok, so what benefit is there to gain blocking the 4th accumulator feed hole?

 

Firmer/quicker 4th, fixes another possible leak for 3rd accumulation, and provides more lube to the rear gear train. Easy mod

 

Gotcha

 

I installed the 4th piston and spring , and all is fine now. Can't believe I missed that....

I will try the setscrew mod to block the 4th feed hole on my performance 4l60e build