700R4 Broke 1-2 Accumulator spring
05-10-2010, 12:43 PM
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Car: 86 T/A
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Transmission: 700R4
Axle/Gears: 3.27 9 bolt
700R4 Broke 1-2 Accumulator spring
i was just wondering what causes this problem? When I put a transgo kit in my old '86 700R4 trans it was broken. Just dug into my '88 probuilt 700R4 yesterday and it was broken!
05-10-2010, 05:09 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 Broke 1-2 Accumulator spring
its a very busy spring. mine broke also. i think its mainly an engineering flaw. gm wanted that spring to soften the shift but its too weak to take the pressure. thats my guess...
05-10-2010, 05:43 PM
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Car: 1988 Trans Am, 2005 Sierra 2500
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Transmission: Built TH700R4 with 26-2800 Stall
Axle/Gears: GM 10 bolt 3.73 Posi
Re: 700R4 Broke 1-2 Accumulator spring
How do you know when it broken? Will it not shift or shifts soft? I have a built 700 and dont need this happening.
05-10-2010, 05:48 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 Broke 1-2 Accumulator spring
mine wouldn't shift 1-2 at WOT.
05-10-2010, 09:29 PM
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Car: 86 T/A
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Axle/Gears: 3.27 9 bolt
Re: 700R4 Broke 1-2 Accumulator spring
I am contimplating eliminating this spring for competition use. But just seems to be a problem every time I pop open a valve body. According to PATC this spring is supposed to give the firmest shift, I am wondering if they make a sleeve or something for it.
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05-10-2010, 09:34 PM
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Re: 700R4 Broke 1-2 Accumulator spring
these springs always break. Green, orange, blue, doesn't matter. I always sleeve mine. I make my own sleeves.
05-10-2010, 09:39 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 Broke 1-2 Accumulator spring
the B&M kit uses sleeves. which is why they have hard shifts all the time.
05-10-2010, 09:48 PM
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Car: 86 T/A
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Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Re: 700R4 Broke 1-2 Accumulator spring
Wouldnt just removing this spring give you the hardest shift for a race application? Or is still ideal to run a spring?
Atilla the fun: what do you make your sleeves out of?
Atilla the fun: what do you make your sleeves out of?
05-10-2010, 10:04 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 Broke 1-2 Accumulator spring
you need the piston centered. so you need something. i want to take my sleeves out and put springs back in. i hate that hard shift when im driving slow.
05-11-2010, 07:51 AM
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Re: 700R4 Broke 1-2 Accumulator spring
I space the piston with custom aluminum blocks, so the piston lives on the separator plate. I love the part throttle upshifts chirping the tires. It makes people turn and look. It saves gas and tickets not having to go WOT to get the chirp. I love the tail end of the car kicking sideways when I do a wOT upshift.
Best to use the B&M kit, but if you have a lathe you can turn your own.
Best to use the B&M kit, but if you have a lathe you can turn your own.
05-11-2010, 10:14 AM
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Car: Trailblazer EXT 4.2 (Firebird Form)
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Re: 700R4 Broke 1-2 Accumulator spring
Here we modify the hell out of the powertrain... leave the tires for last... 
.. rain, I laugh at rain!!!!... 
..
BTW that is a good point, a firm shift could spin you out, that's if there's no spring... you guys say that if the spring is MIA, you end up with a firmer shift...
.. rain, I laugh at rain!!!!... .. BTW that is a good point, a firm shift could spin you out, that's if there's no spring... you guys say that if the spring is MIA, you end up with a firmer shift...
05-11-2010, 01:23 PM
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Re: 700R4 Broke 1-2 Accumulator spring
the little chirp at part throttle is dangerous if it happens when you're not going straight on a wet road, but the WOT upshift is dangerous anytime the road is wet.
A broken spring makes for a long slow upshift that allows a lot of second gear band slippage.
A broken spring makes for a long slow upshift that allows a lot of second gear band slippage.
09-06-2011, 06:12 AM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 Broke 1-2 Accumulator spring
I don't really know how long mine was broken either. My car was so loud and such a handfull on the street that I never made a WOT shift. I took the car to the dragstrip, then noticed the problem. I installed the b&m shift kit and found the broke spring. Now the only problem is the hard 1-2 shift at all speeds...funny story my girlfriend was riding with me and was taking a drink, the tranny shifted into 2nd and the hard shift made her spill coke all over her face and up her nose...lol...guess the b&m kit is good for a laugh
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