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Old 07-13-2010, 04:26 AM   #1 (permalink)
wellgeo03
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700R4 Shifting Issues

Hey everyone, I am needing some advice on my tranny.

I just installed the new engine in my 83 and before the swap, the tranny shifted great.

The new engine has a 6.5 IP on it, with the newer style throttle position switch on it, so I swapped it for the old one. This is the only thing that was changed.

Since the install, the tranny shifts poorly. If I rug it, the tranny won't shift out of 1st, I have to let off for it to shift. When just accelerating normally, it shifts OK except when shifting into OD. It is very slow to shift into OD. I can feel it unlock out of third, but OD takes far too long to lock in.

Anyone know what could be causing this? I am assuming that the TPS could be causing the no shift at WOT, and I tightened up the TV cable one click hoping it would help the OD shift. No luck.

Any advice would be great!

Thanks, Sheldon

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1983 Chevy K1500
6.2L Diesel C-code, 700R4 with boost valve
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6.5L pump and injectors, timing gear drive, stud girtle, new everything. Ispro Boost & Pyro, CTS Turbo, Kennedy quick glow plugs.

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Old 07-13-2010, 10:45 AM   #2 (permalink)
Diaric
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sounds like the TV cable. the TPS is only supposed to affect the lock up.

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well to make your pump retarded, you could let it hang out with me for a day
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Yeah Diaric, I gotta say, I'm afraid I'm going to have to give you an official warning on that.
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Old 07-13-2010, 12:08 PM   #3 (permalink)
cbr600rx7
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I am having the same issue in my 85. After checking into it i found the TV cable was frayed and just in poor condition.
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Old 07-14-2010, 12:17 PM   #4 (permalink)
revx1000
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Sounds like your t.v. cable is out try to move the cable closer to the pump a few clicks then road test .
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Old 07-14-2010, 05:03 PM   #5 (permalink)
wellgeo03
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Ok let me see if I understand this right. I want to slide the cable toward the the pump which would provide less pull on the valve right?
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1983 Chevy K1500
6.2L Diesel C-code, 700R4 with boost valve
3 inch lift, 31-10.5 R15 Hankook KL71 MTs
6.5L pump and injectors, timing gear drive, stud girtle, new everything. Ispro Boost & Pyro, CTS Turbo, Kennedy quick glow plugs.

1995 Chevy K2500
6.5L F-code, auto, Buddy's 4 Banger, Ispro gauges, stud girtle, ARP head studs, .006" decked, .010" lower pistons, Felpro head gaskets, high flow injectors, HX 40W-II, 4" Diamond Eye exhaust.
265's on PYO's
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Old 07-14-2010, 07:00 PM   #6 (permalink)
revx1000
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Correct
outter cable move toward the pump . what you are doing is shorting the out cable (plastic) and lenghting the inner one
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Old 07-16-2010, 02:36 AM   #7 (permalink)
wellgeo03
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Well I finally had a chance to play with my TV cable a bit. I moved the outer casing forward toward the pump as was mentioned, and it made my shifts worse. Soft, slow, and sloppy.
So I tried moving it back and it seems to be a bit better. I would still like it a little firmer, but it isn't too bad.
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2007 LMM Edge Evo CTS Race, Magnaflow 4 inch duals, chrome H2's.

1983 Chevy K1500
6.2L Diesel C-code, 700R4 with boost valve
3 inch lift, 31-10.5 R15 Hankook KL71 MTs
6.5L pump and injectors, timing gear drive, stud girtle, new everything. Ispro Boost & Pyro, CTS Turbo, Kennedy quick glow plugs.

1995 Chevy K2500
6.5L F-code, auto, Buddy's 4 Banger, Ispro gauges, stud girtle, ARP head studs, .006" decked, .010" lower pistons, Felpro head gaskets, high flow injectors, HX 40W-II, 4" Diamond Eye exhaust.
265's on PYO's
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