home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 02-25-2014, 11:57 PM   #1
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default acc mod wont shift hard to 2nd gear?

did the acc mod, the piston for second gear did not have the underside spring on it , on my other transmission it is there. first to second gear is not harsh at all the second to third is ok ? anyone have any ideas? all shims are the same length as the sprins inside the accumulators. Kick down cable is tight < and new> do i have it too far tight for it to hit 2nd? any ideas would be great thanks. Kind of tired of dropping the pan ... the trans had no slip before the mod was done so i know its not because its bad
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 09:34 AM   #2
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

Any ideas why it would shift better without the acc mod?
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 10:40 AM   #3
centason
Autogestion
 
centason's Avatar
 
Join Date: Jan 2013
Location: Ft.Mill, SC
Default

Quote:
Originally Posted by brentwood volvo View Post
Any ideas why it would shift better without the acc mod?
Either you did something wrong, or the kool-aid man is knocking... What were your steps? You may have followed instructions, but that doesn't mean you didn't miss something.
__________________
Member: TBCCS
"Those who do not move, do not notice their chains." -Rosa Luxemburg
Quote:
Originally Posted by 240240 View Post
Yes, but I keep having the dream of shoving the Cocaine up my ass!
Quote:
Originally Posted by golgothan View Post
Ohh god no, I'd rather eat hot diarrhea than drive a 7/9
Quote:
Originally Posted by RedFridge View Post
You sons of bitches are the biggest thread de-railers in forum history. Any forums history.
centason is offline   Reply With Quote
Old 02-26-2014, 10:46 AM   #4
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

Shimmer the springs to spring length..there is still about a half inch of movement on the pistons. The shims would have to be bigger than the spring to keep the rest of the movement from.happening. it glides into second with no harshness at all. Rest of the shifts are decent. I guess I could make larger shims longer than the springs. Trans had no funk in the trans. Trans has been flushed a couple times . Does not slip at all in gear, I had to replace the kickdown cable I am just tired of dropping the pan and taking fluid baths
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 11:54 AM   #5
DET17
Reformed SAABaholic
 
Join Date: Nov 2009
Location: NW Georgia
Default

Quote:
Originally Posted by brentwood volvo View Post
Shimmer the springs to spring length..there is still about a half inch of movement on the pistons. The shims would have to be bigger than the spring to keep the rest of the movement from.happening.
Half inch? Wow, I remember MUCH less, maybe 1/8 inch, couple mm in my spacers. My AW71 has been shifting "firm" ever since, about 6K miles now without issue. Better check the specs of those that pioneered this mod....I think the spacers needs to be just shorter than the springs. When those pistons move, you've got accumulation. The mod actually removes most of the dampening of the accumulator, and full pressure hits rather suddenly, giving the crisp neck snapping shifts
__________________
Project "cheap thrills" build thread: http://forums.turbobricks.com/showth...67#post4211467

Feedback thread: http://forums.turbobricks.com/showthread.php?t=198746
DET17 is offline   Reply With Quote
Old 02-26-2014, 12:17 PM   #6
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

Even with the springs shunned it has movement the shims are the same length as the spring
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 01:50 PM   #7
DET17
Reformed SAABaholic
 
Join Date: Nov 2009
Location: NW Georgia
Default

Mine started life in my DD with about 128K miles. How many on your AW71?

In short, the firm shifts in all gears came immediately with the accumulator modification. It will almost get rubber shifting into reverse
DET17 is offline   Reply With Quote
Old 02-26-2014, 01:52 PM   #8
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

120k was on it when I bought it last month
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 01:57 PM   #9
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

I need to cut my shims longer than the spring on all of them. The last one I did there was a bottom spring on the middle piston, this one does not have it.
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 04:58 PM   #10
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

Going to drop the pan again
brentwood volvo is offline   Reply With Quote
Old 02-26-2014, 05:41 PM   #11
DET17
Reformed SAABaholic
 
Join Date: Nov 2009
Location: NW Georgia
Default

I followed the famed "Accumulator Mod" thread to the letter....works as advertised. Good luck.
DET17 is offline   Reply With Quote
Old 02-26-2014, 10:36 PM   #12
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

re shimming them worked out ... there was just too much play in them still. Over all it was a productive day < awesome >
brentwood volvo is offline   Reply With Quote
Old 02-27-2014, 09:01 AM   #13
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

Quote:
Originally Posted by DET17 View Post
Mine started life in my DD with about 128K miles. How many on your AW71?

In short, the firm shifts in all gears came immediately with the accumulator modification. It will almost get rubber shifting into reverse
mine shifts harder now but no where near laying down rubber shifting into reverse
brentwood volvo is offline   Reply With Quote
Old 02-27-2014, 05:55 PM   #14
brentwood volvo
Board Member
 
Join Date: Oct 2013
Location: st.louis mo
Default

is your cake down cable tightened all the way ?
brentwood volvo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 07:30 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.