Shift Kit Help on Auto 700r4
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From: Vettemod.com For the C3 People
St. Jude Donor '06
There are quite a few colors, each represents a different tension. They varied from year to year and model to model.
Squeeze them to see which is stiffer. Put the stiffer(I believe orange is stiffer than black) in the case bore. That is the 3-4 accumulator. Put the weaker spring in the 1-2 accumulator. It will likley be too soft. A white spring is my favorite in the 1-2.
Squeeze them to see which is stiffer. Put the stiffer(I believe orange is stiffer than black) in the case bore. That is the 3-4 accumulator. Put the weaker spring in the 1-2 accumulator. It will likley be too soft. A white spring is my favorite in the 1-2.
Terry
I ran across a TCI TV Constant pressure regulator. $234.00 It holds a constant 200PSI on the system. Now this seems strange to me, as per GM specs, this is way high system pressure. I was assuming that as the throttle position changes so does the need for variation in fluid pressure, I guess this is not the case?
Just rattling on, trying to understnad how this thing works.
Thanks to all
tt
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From: Vettemod.com For the C3 People
St. Jude Donor '06
There are quite a few colors, each represents a different tension. They varied from year to year and model to model.
Squeeze them to see which is stiffer. Put the stiffer(I believe orange is stiffer than black) in the case bore. That is the 3-4 accumulator. Put the weaker spring in the 1-2 accumulator. It will likley be too soft. A white spring is my favorite in the 1-2.
Squeeze them to see which is stiffer. Put the stiffer(I believe orange is stiffer than black) in the case bore. That is the 3-4 accumulator. Put the weaker spring in the 1-2 accumulator. It will likley be too soft. A white spring is my favorite in the 1-2.
THANK YOU for help
I am very pleased with this feel of shifting and performance. If I want to get crazy and rip down the road I just jump in the C5, not as much worry about stuff breaking.
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You are da Man! Dropped the pan, the accumulator for 1-2, put in the black spring with a 5/8 inch spacer. (Did not mess with the 3-4 as the shirft here was fine) Took less than an hour from jacking car to filling back up with fluid. It did the trick. The shift is still firm, still allows very agressive start, but does not bang on the 1-2 shift. You were also correct in that the black spring is softer, I would suggest to anyone else to go with the orange spring or white as you suggested. The black is ok but may be a little soft. The B&M kit removes both of these springs, for 1-2 and 3-4.
THANK YOU for help
I am very pleased with this feel of shifting and performance. If I want to get crazy and rip down the road I just jump in the C5, not as much worry about stuff breaking.
THANK YOU for help
I am very pleased with this feel of shifting and performance. If I want to get crazy and rip down the road I just jump in the C5, not as much worry about stuff breaking.
Racer
Joined: Nov 2003
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From: Grafton WV
I have the B&M Shift kit in my 81 as well but it is a 350 Tranny and mine shifts hard too. I found that if you move the shift selector manually 1-2-3 it does shift a lot smoother "SOFTER" even under WOT.
Give it a try.
Give it a try.
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From: Vettemod.com For the C3 People
St. Jude Donor '06
Good input though.
tt
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From: Vettemod.com For the C3 People
St. Jude Donor '06
Pete, have one more question, would you happen to know what fitting size the tap is to check fluid pressure on 700r4?
And where the heck do you get a 300psi gauge these days? I would imagine Summit has a kit, for lotsa $$$ no doubt.
Thanks in advance!
tt
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Race Director
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It is in the valve body. The transgo shift kit alows for full control over downshifts(at any speed). Much more expensive kit than the B&M, but worth it.
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From: Vettemod.com For the C3 People
St. Jude Donor '06
When Hobart hooked up the pressure gauges he found line pressure was way too high at partial throttle so he pulled the cable forward about ¼ “ to get the correct pressure. He had me feel that the cable was slack and had stretched.
FWIW I would have a tranny shop adjust the TV cable using line pressure or maybe use a new cable.
Oh well, live and learn, spend more money......
Was your set at 1/4 inch beyond the first spot or second?
I have a test gauage coming to verify mine.
Thanks to anyone with info.
terry
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From: Apex NC
OK, Against my better judgement I added a B&M Shift kit. Wahoo, it allows ole Goldie to burn some rubber and get sideways in second.
BUT, just cruising, when easing off brake, shifting from 1st into 2nd gear, it is hard shift, as designed.
I mean hard shift!
So, we had to drill two holes a little larger,(No more than 1/64 bigger) pull out about three springs, swap a plunger and that was about it.
Is it possible to lighten up on the 1 to 2 shift?
Worst case, can I just go back to original setup eventhough two holes are a little larger?
Any advice is appreciated.
Thanks
tt
BUT, just cruising, when easing off brake, shifting from 1st into 2nd gear, it is hard shift, as designed.
I mean hard shift!So, we had to drill two holes a little larger,(No more than 1/64 bigger) pull out about three springs, swap a plunger and that was about it.
Is it possible to lighten up on the 1 to 2 shift?
Worst case, can I just go back to original setup eventhough two holes are a little larger?
Any advice is appreciated.
Thanks
tt
Just wanted you to know that it is possible for the 700r4 to have this added. I also had the torque converter changed out.
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From: Vettemod.com For the C3 People
St. Jude Donor '06
Couple of comments and questions.
I tested my system pressures and it checked out at all suggested pressure levels per specs. I am shocked, I actually had it performing correctly, blind luck
As before, per your suggestion, changed spring back into the 1-2 accumulator, nice smooth shift into 2nd now. Questions:
1.) No matter what speed, even down to 5mph I cannot get a 2-1 shift, is this per design? Car still pulls like crazy even at 2nd gear but would love to get that additonal torque going into 1st. From a standing start, WOT, it will wind out to about 30mph in 1st then shift into 2nd. 3-2 shift and OD-3 and OD-2 shifts ok too. All of these shifts fall into spec'ed mph range.
2.) Have a friend (IDRIVEC5) who also just brought home an 82, his 700 will not go into reverse, is there a particular valve that we can check to see if it is stuck or any other place to look?
I have checked ever book I have and there is not much info on the 700 as applied to Corvettes
Thanks in advance!
Terry
