Accumulator blocker rod/727

Anyone know the correct length for the accumulator blocker rod in a 727? My memory seems to think that it's 2.850", not sure I can trust it though. I ordered a bunch of parts and this one got left off the order. Don't want to wait until next week to finish this up.

Thanks, Brian

the one in my B&M manual kit is 2.952 long.
it's a solid rod, and if i ever use this kit, i will make a new rod out of tubing.
i can't tell you what the TransGo rod length is, as it's in my car at present.

Either of those lengths will work as long as it's not too long to keep the VB from seating.

thanks John.

Thanks guys. With the return spring out, it might not even need a rod. It's got one anyway.

Brian

With the spring removed, the accumulator still fully functions on the 1-2 upshift. Only way to stop its function is a blocker rod.

mopar performance shift improver servo kit, .709 tubing 2.75 long

Does the rod hold it in or out of hole?

With the trans mounted in the car the rod goes in first then the
piston. So the rod spaces the piston toward the valve body
mounting surface.

My apologies for hijacking the post, but lets say you were building a case from scratch, am I right in thinking that you could scrap the accumulator circuit/system entirely if you were running a manual valve body??
??

Many race valve bodies eliminate the accumulator with the goal of the firmest 1-2 upshift but doing so can lead to rear clutch failure. Ya pays your dime and ya takes your chances.

Good point.
As I recall, the Griner valve body needed a shorter blocker rod than the standard factory VB.
But I don't think it uses that circuit anyway.

After asking a number of questions here on this topic years(?) ago, I decided to use these parts when I had the valve body off before my trans went in w/ the engine:
https://www.sonnax.com/parts/1851-accumulator-piston-kit
https://www.ctpowertrain.com/sonnax-new-hd-enhanced-performance-valve-body-accumulator-spring/

With the Griner you leave the accumulator out. Keith

First time I've heard that ! will leaving the accumulator piston in cause any problems?

Not a problem unless it has a blocker that is to long and it holds the valve body up causing a leak.
All Griner valve bodies are this way. The accumulator does nothing.
The only exception is if it has the modification to get a line pressure from the accumulator port. Like the Pro Flite. Keith

https://www.coperacingtrans.com/?product=727-904-518-618-billet-aluminum-accumulator-w-rod

Thanks for those links, ordered the spring for my loooong term project. I have also thought that a heavier spring would be best for a street/strip car.