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#251 |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
A.....3rd Clutch Feed. .110"
B.....2nd Clutch Feed. .073"-.076" C.....3rd Exhaust. .093" G.....3-2. .076"-.086" OK if already bigger. E......4th Clutch Feed. .110" ![]() |
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#252 | |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
Quote:
It's tough to tell cast apart from steel.....I run the Trans Go 700 PHK Pump Rings in EVERY 700/200/4L60E build! Best $8 dollars you will ever spend! Reuse your old support, Run the shiny side toward the O-Ring. |
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#253 | |
Registered User
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 222
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Re: 700R4 build thread.
Thanks! I've got the transgo unbreakable rings on the way.
I REALLY appreciate the info! EDIT: I emailed the seller of my pump kit, asking about whether the rings were steel or cast iron. Here is their reply, which makes me want to laugh and cry at the same time. Quote:
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My Chevy Truck Project Build Thread '62 Ranchero - 200 I6, 3-on-the-tree, power nothing. '71 LeSabre - 455 Stage 1, power everything. Last edited by jamyers; 09-22-2017 at 11:11 AM. Reason: Add sadly hilarious vendor reply |
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#254 | |
Registered User
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 222
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Re: 700R4 build thread.
Quote:
Your above comment didn't soak into my head until after I'd driven out the 2nd Accumulator pin and staked the ball from the Sonnax Pinless kit into the housing. I didn't think it would be a good idea to try and go back, so I went ahead with the Sonnax Pinless piston and the original unbroken spring, as per Sonnax's '94-Later instructions (spring in the Accumulator body, then Piston with dome toward the separator plate). Do you see any issues with that setup? FWIW, the Trans-Go springs are a tight fit into that Sonnax piston, no wonder they can break.
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My Chevy Truck Project Build Thread '62 Ranchero - 200 I6, 3-on-the-tree, power nothing. '71 LeSabre - 455 Stage 1, power everything. |
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#255 |
Registered User
Join Date: Jan 2018
Location: AUBURN
Posts: 2
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Re: 700R4 build thread.
clinebarger, thanks a million for this wealth of knowledge. Having installed many trans kits in the past, and not been happy with the results, I was able to decipher what to use where and how to set it up all in one shot... Thanks to this topic. Just finished building my first 383 and dove right into the transmission. Upshifts, downshifts, etc, it all works perfectly. Im still grinning ear to ear from the first test drive 2 hours ago!
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#256 |
Registered User
Join Date: Oct 2014
Location: Marshall MI
Posts: 3
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Re: 700R4 build thread.
Clinebager great thread! i am looking for a 2500rpm convertor any recamendations?
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#257 |
Senior Member
![]() ![]() Join Date: Oct 2014
Location: Eagle, ID
Posts: 3,005
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Re: 700R4 build thread.
Unfortunately, Clinebarger is no longer around. I have a 700r4 and purchased an FTI unit in the range you are looking for. I like it.
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#258 |
Registered User
Join Date: Jan 2018
Location: AUBURN
Posts: 2
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Re: 700R4 build thread.
Not super happy with the b&m tork master 2400. Feels completely stock.
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#259 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: 700R4 build thread.
Old thread, but easy question. The output shaft has 2 holes in which you can align the speedo gear. How do you know which one to use? Thanks in advance!
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#260 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: 700R4 build thread.
Found a video online, it goes in the most forward hole. Posting just in case anyone else runs into this. Got everything back together and the speedo is dead on!
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#261 |
Registered User
Join Date: Aug 2013
Location: Kennesaw, GA
Posts: 11
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Re: 700R4 build thread-Line bias valve
Looking for some ideas on how to correct line pressure flutter in 3rd or 4th over 1/2 throttle. Gauge bounces from 125-200PSI rapidly. I see it was recommended not to block the line bias valve, I'm confident that is the cause of my pressure problem.
Trans is in a 68 C2500, 4:11 gears and worn out 327. I have a 355 ready to go in but want the trans 100% 1st. Valve body modifications were the transgo SK700 kit. I went back and reduced the boost valve from .500 to the next one down, .475 I believe. This improved shift feel but did not fix the line pressure flutter. TV cable geometry is set up properly. The trans works/shifts perfect, without a pressure gauge you would never know there was a problem.
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1968 GMC Custom Camper, 1 owner 2005 GTO 2015 GMC All Terrain |
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#262 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Re: 700R4 build thread.
Hello all, wanted to see what your thoughts are regarding 700R4 - 4L60 - 4L60E servo pins.
Option 1: The 84-87 pins had (2) teflon rings to seal the servo pin. Option 2: In 87 there was a factory update and following this they did not include the shaft seals. Option 3: Sonnax has a servo pin that has (2) teflon seals and an o-ring. Note, there are also different lengths but I'm not really focused on length rather the seals (2 ring tip, 3 ring tip and HD band) |
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#263 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Re: 700R4 build thread.
Which do you think is better? Do you think the more seals the better, no seals are required, all original 84-87 w/ only 2 seals??? Transmission experts input requested!
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#264 |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 700R4 build thread.
I started using the Sonnax Pin exclusively a couple years back as I was welding extra length on stock pins just about everytime when using OE 4L60E Borg Warner Bands.
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#265 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Re: 700R4 build thread.
Clinebarger, you're still on the forum! Man, I owe you a beer or dinner or something. Your writeup gave me the info needed to get into rebuilding 700R4 & 4L60 transmissions. I really approciate the feedback, I kinda feel like I got a reply back from a legend
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#266 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Re: 700R4 build thread.
Hello, just wondering what everyone's opinion is on the 3-4 accumulator setup.
Common consensus seems to be either: block the case passage with a plug or install a super stiff spring. I really don't like permanently modifying the case, so this time I stacked two pistons and some shims in the 3-4 cup and set the clearance at 10-16 thousandths of play. What are your thoughts??? |
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#267 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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I was finishing up the rebuild on the '92 4L60 and I wanted to annotate some oddities of the 1992 version.
1) The governor doesn't have a upper mount for a governor clip 2) A second boss is present on the passenger side, assuming it's for mounting electrical connections 3) There's a metal vent tube instead of the plastic one |
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#268 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Finally got the old truck some road miles, the 3-4 accumulator stackup works great. It shifts quick, firm but not too much. All in all pretty darn good, hopefully it will save the 2-4 band for some miles later on down the road!
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#269 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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I was using the B&M governor recalibration kit and the clip came off. I'm really OCD about them and triple check 'em before installing, this being the second time it's happened. I got tired of it and decided to try some 2-56 all thread and nylon look nuts. It turned out really well, no worries about the governor now. It only cost 5.00 per set of rods and nuts.
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#270 | |
Registered User
Join Date: Dec 2018
Location: San Bernardino
Posts: 72
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Re: 700R4 build thread.
Quote:
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#271 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Hello fellow truck go-ers, I haven't seen a lot of info on the 700R4 pump, it's operation and how the pressures (1+2, 3+4 and R) are actually regulated. I though I'd share some info with the community.
Pressure Regulator Valve Operation: The further inward the Pressure Regulator Valve is in the pump, the higher the volume and pressure. Conversely the further out the pressures regulator valve is, the less pressure. When the pressure regulator valve gets enough line pressure against it pushing outward, the valve allows fluid to pass and press against the pump slide tab and reduce pump pressure. Pressure on the pump slide tab causes the slide to push against the slide spring, then move the slide and as a result decrease pump output and pressure. So the more compressed the slide spring the less the pressure. The boost valves effect line pressure and ramp, but total max pressure of pump is set by pressure relief valve. At idle the TV valve is at lowest pull level, meaning low TV pressure, the Pressure Regulator Valve is outward and the pump is producing less line pressure. Modulated TV (TV), 3-4, 1-2 and Rev boost valves effect pressure regulator valve movement inward and result in different line pressure increase for each gear selection. |
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#272 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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After the my latest 700R4 rebuild I noticed 1, 2 and R had high pressures of up to 300 PSI. 3 & 4 were around 200 when full throttle accelerating, pretty normal.
Yes the TV cable is adjusted correctly, I've rebuild several 700R4-4L60s for vehicles, friends and family. I tried swapping out the Transgo green spring for a TCI purple and it made no change, the pump pressure valve spring doesn't make that much pressure difference. Since it was 1,2 & R I figured I'd take a stab at the Reverse Low boost VALVE (RBV) . I was already running a stock style .296 valve. Since it's a 4WD I'm going to spend time in manual first and second, so I've got to get the pressure back to reasonable, from 300 to around 200 plus. So to reduce the pressure in 1,2 & R I took .045 off the RBV piston, the nub that faces the spring. To my surprise it actually worked, it dropped the pressure by about 50 psi at max acceleration. I'm taking that as about 1 psi per thou off the RBV piston, really glad I mounted a transmission pressure guge and keep an eye on when driving around. I'm going to drive it for a while and see how the pressures look under different conditions and trans temperatures, I might still take a little more off. Just wanted to pass on what I learned from the experience. |
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#273 |
Registered User
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 201
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Oh, if you order a replacement Boost Valve or Reverse Low Boost Valve get a bright light, some magnification glasses and give them a once over. Manufacturers ship the piston and sleeve loose in the same package and 50% of the time they bang together causing damage and preventing free movement which can kill clutches and pumps.
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#274 |
Registered User
Join Date: Jul 2017
Location: Texas
Posts: 403
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Re: 700R4 build thread.
This looks like fun, rebuilding your own transmission. But it wouldn't be fun if it didn't work right. Or if it died after 8 months of use.
I'll do it someday when I have a backup truck. |
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#275 |
Registered User
Join Date: Oct 2014
Location: somewhere . . .
Posts: 948
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Re: 700R4 build thread.
Cool thread . . .
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dont want to hear excuses, i want to hear solution(s) |
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