Lewis Maudlin Posted October 4, 2001 Share Posted October 4, 2001 OK, I have a 700R4 in my 355sbc 350hp '74.5z. The shifting never has been right. If I adjust the kick down for decent shifting through the first three, then I can't get it to stay in 4th without downshifting. I even ended up getting embarassed by a 1994 corvette. I had him until I redlined in 3rd (you do the math, 3.54 rearend), then I couldn't go to fourth without downshifting. He eventually left me screaming down the road in third. How embarassing. Anyway, my transmission guy suggest a governor off of a corvette. Would that help tighten up the first three so I can loosen the kickdown for fourth? Anyone know? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 4, 2001 Share Posted October 4, 2001 I know mine with the lock up torque converter would never allow me in fourth above 100. I had it set up for strip racing though, so I think that is why. I hated the r4, so I put a t56 in. Quote Link to comment Share on other sites More sharing options...
Guest Tht1KSguy Posted October 4, 2001 Share Posted October 4, 2001 last i heard the 700r4 doesn't allow full throttle upshifts to 4th gear. that's one of the main reasons that if i go sbc that i'll be choosing the 200r4 Quote Link to comment Share on other sites More sharing options...
Guest kc6wfs Posted October 4, 2001 Share Posted October 4, 2001 I have the forbidden 1984 700R4 in mine and can upshift and down shift full throttle at any speed. Yes it has had a LOT of work done to it. go to : http://www.bowtieoverdrives.com/index2.htm for a LOT of good info on 700R4 trans's. Hope this helps. Dave Quote Link to comment Share on other sites More sharing options...
Andrew Bayley Posted October 4, 2001 Share Posted October 4, 2001 Just curious, Do you guys know what yea your 700R4's are? I've got an 87.5 (with the auxilary valve body) with the B&M throttle valve and I've got no problems with WOT fourth gear operation. In fact, at anything over 2500 rpm's in fourth, the transmission will not down shift automatically. -Andy Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted October 4, 2001 Share Posted October 4, 2001 quote: Originally posted by Indiana-Z: OK, I have a 700R4 in my 355sbc 350hp '74.5z. The shifting never has been right. If I adjust the kick down for decent shifting through the first three, then I can't get it to stay in 4th without downshifting. How do you get it to stay in 4th by downshifting? Mines been worked over heavily by a few guys now and I don't have 3-4WOT, I think their's some ghost they've all missed. FWIW, I was once given the 700R4 TV cable 'pivot point' location and it did not match my 1406 edelbrock carb....I made an offst stud to correct this (AFAIK, nooone offers this) and that greatly improved my overall shift points/quality, smooth bottom and top with improved shift points. Previously I could adjust TV for good smooth bottom or good smooth top.....never both (one would be harsh). Another fella backed that up saying Qjets don't have the correct swing arc either, so if your TV isn't seeing the correct pressure transitions relative to throttle it will not be ideal....I'd love to see those issues nailed down.......mine's an '87 or '88 I believe. search the forum...it was covered heavily on governor and specific springs before...and I've been told as well a corvette governor is a cheap piece ($45?) to step to a more calibrated setup for our Z's than OEM camaro etc, it's in mine but still not ideal. I expect 383Z will straighten us out here...... Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 4, 2001 Share Posted October 4, 2001 Check out this site for TV cable setup...loks like a very good unit (patent pending I think) TV made easy Tim Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted October 4, 2001 Share Posted October 4, 2001 quote: Originally posted by Tim240Z: Check out this site for TV cable setup...loks like a very good unit (patent pending I think) TV made easy Tim Looks promising...as long is allows swing arc adjustment and not just cable length. Ahh, now I see that fuzzy pic enlarges and shows they're using various slotted plates to allow positioning the TV end differently. The actual TV mount off the carb plate looks good and MUST be very sturdy as most carb only mounts are not stiff enough for good TV setup (ie. flex of 0.5 to 1mm is too much). That part I can't use as it won't match my proflo base. [ October 04, 2001: Message edited by: Ross C ] Quote Link to comment Share on other sites More sharing options...
383 240z Posted October 5, 2001 Share Posted October 5, 2001 Oh yes the dreaded 4-3 down shift. What needs to be done to correct this malady is build your valve body correctly!!! Dont buy the crap B&M is selling as a Super trans kit. It does not fix the problem!!! What you need is a properly programmed valve body just like our beloved Z's you can not change just one thing it needs to be done as a system. the main problem is the exhaust port on the TV valve sleeve is only .029" this does not dump fluid fast enough for hi-po usage. The proper valve sleeve is .071" and is made of steel. This requires a new valve, installed into a properly reprogrammed valve body. The govoner can also be changed with a very simple spring kit. Some thing else is a corvette servo. for max apply psi a billet servo is also avalible.(85% greater then the vette unit) this is a neck snapper. Now that being said this .071" valve will only keep you in fourth from 3/4 or less throttle allowing you to cruise at high speed in over drive. Was not this the reason we put over drives in our cars in the first place?? Cerberus you hit the nail on the head for 700 longevity there is no adjusted a little high or a little low on the tv cable it's dead on or its WRONG!!this will destroy your overdrive clutches so fast if not funny. also the servo in the aux valve body on the later units has a spring under it to soften the apply these like to break on miss adjusted units this little problem will also cause a ghost problem with 3-4 and 4-3 shifting> Keith Sorry for the rant Quote Link to comment Share on other sites More sharing options...
Guest dankinzle Posted October 5, 2001 Share Posted October 5, 2001 Hey, I just talked with the guy behind the tv made easy thing and he is really a great guy. He spent like 20 minutes on the phone with me explaining how the system works and how it will allow you to adjust shifting behavior. I couldn't quite understand how something could adjust the shifting qualities if there is the pulll length of the tv plunger is one set length. The system actually allows you to adjust the rate of how fast the tv is pulled when hitting the throttle while still retaining the full 1.65" or whatever the pull length is. If you set it to shift harder it pulls more of the cable initially and vice versa. I'm getting one so we'll see how well it actually works... Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 5, 2001 Share Posted October 5, 2001 I am definently not an expert on th700's but I have blown 4 of them aoart. The TV cable adjustment cannot be stressed enough! B&M, TCI, and hughes have tried but they all broke. Smoked clutches, bad bands, and even had a torque converter output shaft shear completely off. These transmissions open alot of doors for deep gears and high speed cruising but they do have limitations. The last one I had built (Walnut Creek Trans.) has done the best so far but I don't put slicks on my car(70 El Camino) or launch it real hard (HOW DO YOU LAUNCH HARD WITHOUT SLICKS?) but it has held up better than the major company versions. By the way, I first put the overdrive tranny in in 1992, when it was still kinda exotic in an old chebbie!!! O/D's rule. My E.C. goes 12's, drafted a Z28 to 145+ and have averaged better than 17 mpg to San Diego on I5!! Imagine in a 2500lb. Z! Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted October 5, 2001 Share Posted October 5, 2001 "Now that being said this .071" valve will only keep you in fourth from 3/4 or less throttle allowing you to cruise at high speed in over drive." So, what's needed for full WOT in 4th to redline? That 3/4 throttle stuff I've had for a while and does not suit my highway jaunts or lapping days at all. "Was not this the reason we put over drives in our cars in the first place?? " Nope, so I can do over 120mph without going over 6000rpm oh yeah, and daily 365day/yr driving I suppose Quote Link to comment Share on other sites More sharing options...
383 240z Posted October 5, 2001 Share Posted October 5, 2001 Well Ross if you want that I need to build you a fully manual or a stage IV valve body this is similar to the body I was detailing you about in our other conversation I'll detail you on it later. Keith Quote Link to comment Share on other sites More sharing options...
Guest needwaymorespeed Posted October 5, 2001 Share Posted October 5, 2001 Ross they now make a bracket that will bolt on to youre carb linkage to cure the swing arc of the tv cable ,its in jegs for 28.00 -sounds like you already have youres speced out though-raptor trans also carries it there link is posted on this thread or the one below that s titled 350 vss 700 Curtis Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 5, 2001 Share Posted October 5, 2001 I will be trying it with a 2004R soon. Ross, If you peruse the install instructions, you will see that there are some adjustments for cable angle etc for customizing shift behavior etc, and with the linkage adapter supplied with the kit, it should make carb linkage size a moot point? Tim Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 5, 2001 Share Posted October 5, 2001 The cable must be a 1 to 1 travel with the throttle cable .Improper tv cable adjustment is why so many burn up .My tci kit stays in the gear i want no down or upshifts wot 4th any time . Quote Link to comment Share on other sites More sharing options...
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